REVERSED SINGLE-WORKING-MEDIUM VAPOR COMBINED CYCLE

Abstract

The reversed single-working-medium vapor combined cycle of the present invitation belongs to the field of thermodynamics, refrigeration and heat pump. A reversed single-working-medium vapor combined cycle method consists of seven processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 4-5 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 5-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 5-6 of the M.sub.1 kg of working medium, a depressurization process 6-1 of the M.sub.1 kg of working medium.

Claims

1. A reversed single-working-medium vapor combined cycle method consisting of seven processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-releasing process to set the state (4) to (5) of the (M.sub.1+M.sub.2) kg of working medium, performing a depressurization process to set a state (5) to (2) of the M.sub.2 kg of working medium, performing a heat-releasing and condensation process to set a state (5) to (6) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (6) to (1) of the M.sub.1 kg of working medium.

2. A reversed single-working-medium vapor combined cycle method consisting of eight processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-releasing process to set a state (4) to (5) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (5) to (2) of the M.sub.2 kg of working medium, performing a pressurization process to set a state (4) to (6) of the M.sub.1 kg of working medium, performing a heat-releasing and condensation process to set the state (6) to (7) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (7) to (1) of the M.sub.1 kg of working medium.

3. A reversed single-working-medium vapor combined cycle method consisting of eight processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set a state (4) to (5) of the M.sub.2 kg of working medium, performing a heat-releasing process to set the state (5) to (6) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (6) to (2) of the M.sub.2 kg of working medium, performing a heat-releasing and condensation process to set a state (4) to (7) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (7) to (1) of the M.sub.1 kg of working medium.

4. A reversed single-working-medium vapor combined cycle method consisting of nine processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-absorption process to set a state (3) to (4) of the M.sub.2 kg of working medium, performing a pressurization process to set the state (4) to (5) of the M.sub.2 kg of working medium, performing a heat-releasing process to set the state (5) to (6) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (6) to (2) of the M.sub.2 kg of working medium, performing a pressurization process to set a state (3) to (7) of the M.sub.1 kg of working medium, performing a heat-releasing and condensation process to set the state (7) to (8) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (8) to (1) of the M.sub.1 kg of working medium.

5. A reversed single-working-medium vapor combined cycle method consisting of nine processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set a state (3) to (4) of the M.sub.2 kg of working medium, performing a heat-releasing process to set the state (4) to (5) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (5) to (2) of the M.sub.2 kg of working medium, performing a heat-absorption process to set a state (3) to (6) of the M.sub.1 kg of working medium, performing a pressurization process to set the state (6) to (7) of the M.sub.1 kg of working medium, performing a heat-releasing and condensation process to set the state (7) to (8) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (8) to (1) of the M.sub.1 kg of working medium.

6. A reversed single-working-medium vapor combined cycle method consisting of ten processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-absorption process to set a state (3) to (4) of the (M.sub.1+M.sub.2−X) kg of working medium, performing a pressurization process to set the state (4) to (5) of the (M.sub.1+M.sub.2−X) kg of working medium, performing a heat-releasing process to set the state (5) to (6) of the (M.sub.1+M.sub.2−X) kg of working medium, performing a pressurization process to set a state (3) to (6) of the X kg of working medium, performing a heat-releasing process to set a state (6) to (7) of the (M.sub.1+M.sub.2) kg of working medium, performing a depressurization process to set a state (7) to (2) of the M.sub.2 kg of working medium, performing a heat-releasing and condensation process to set a state (7) to (8) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (8) to (1) of the M.sub.1 kg of working medium.

7. A reversed single-working-medium vapor combined cycle method consisting of nine processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-releasing process to set the state (4) to (5) of the (M.sub.1+M.sub.2) kg of working medium, performing a depressurization process to set a state (5) to (a) of the M.sub.2 kg of working medium, performing a heat-absorption process to set the state (a) to (b) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (b) to (2) of the M.sub.2 kg of working medium, performing a heat-releasing and condensation process to set a state (5) to (6) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (6) to (1) of the M.sub.1 kg of working medium.

8. A reversed single-working-medium vapor combined cycle method consisting of ten processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-releasing process to set a state (4) to (5) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (5) to (a) of the M.sub.2 kg of working medium, performing a heat-absorption process to set the state (a) to (b) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (b) to (2) of the M.sub.2 kg of working medium, performing a pressurization process to set a state (4) to (6) of the M.sub.1 kg of working medium, performing a heat-releasing and condensation process to set the state (6) to (7) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (7) to (1) of the M.sub.1 kg of working medium.

9. A reversed single-working-medium vapor combined cycle method consisting of ten processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set a state (4) to (5) of the M.sub.2 kg of working medium, performing a heat-releasing process to set the state (5) to (6) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (6) to (a) of the M.sub.2 kg of working medium, performing a heat-absorption process to set the state (a) to (b) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (b) to (2) of the M.sub.2 kg of working medium, performing a heat-releasing and condensation process to set a state (4) to (7) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (7) to (1) of the M.sub.1 kg of working medium.

10. A reversed single-working-medium vapor combined cycle method consisting of eleven processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-absorption process to set the state (3) to (4) of the M.sub.2 kg of working medium, performing a pressurization process to set a state (4) to (5) of the M.sub.2 kg of working medium, performing a heat-releasing process to set the state (5) to (6) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (6) to (a) of the M.sub.2 kg of working medium, performing a heat-absorption process to set the state (a) to (b) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (b) to (2) of the M.sub.2 kg of working medium, performing a pressurization process to set a state (3) to (7) of the M.sub.1 kg of working medium, performing a heat-releasing and condensation process to set the state (7) to (8) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (8) to (1) of the M.sub.1 kg of working medium.

11. A reversed single-working-medium vapor combined cycle method consisting of eleven processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set a state (3) to (4) of the M.sub.2 kg of working medium, performing a heat-releasing process to set the state (4) to (5) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (5) to (a) of the M.sub.2 kg of working medium, performing a heat-absorption process to set the state (a) to (b) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (b) to (2) of the M.sub.2 kg of working medium, performing a heat-absorption process to set a state (3) to (6) of the M.sub.1 kg of working medium, performing a pressurization process to set the state (6) to (7) of the M.sub.1 kg of working medium, performing a heat-releasing and condensation process to set the state (7) to (8) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (8) to (1) of the M.sub.1 kg of working medium.

12. A reversed single-working-medium vapor combined cycle method consisting of twelve processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-absorption process to set a state (3) to (4) of the (M.sub.1+M.sub.2−X) kg of working medium, performing a pressurization process to set the state (4) to (5) of the (M.sub.1+M.sub.2−X) kg of working medium, performing a heat-releasing process to set the state (5) to (6) of the (M.sub.1+M.sub.2−X) kg of working medium, performing a pressurization process to set a state (3) to (6) of the X kg of working medium, performing a heat-releasing process to set a state (6) to (7) of the (M.sub.1+M.sub.2) kg of working medium, performing a depressurization process to set a state (7) to (a) of the M.sub.2 kg of working medium, performing a heat-absorption process to set the state (a) to (b) of the M.sub.2 kg of working medium, performing a depressurization process to set the state (b) to (2) of the M.sub.2 kg of working medium, performing a heat-releasing and condensation process to set a state (7) to (8) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (8) to (1) of the M.sub.1 kg of working medium.

13. A reversed single-working-medium vapor combined cycle method consisting of eleven processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-releasing process to set the state (4) to (5) of the (M.sub.1+M.sub.2) kg of working medium, performing a depressurization process to set a state (5) to (t) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set a state (t) to (2) of the M.sub.2 kg of working medium, performing a heat-releasing and condensation process to set a state (5) to (r) of the (M.sub.1+M) kg of working medium, performing a depressurization process to set a state (r) to (s) of the M kg of working medium, performing a heat-absorption and vaporization process to set the state (s) to (t) of the M kg of working medium, performing a heat-releasing process to set a state (r) to (6) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (6) to (1) of the M.sub.1 kg of working medium.

14. A reversed single-working-medium vapor combined cycle method consisting of twelve processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set the state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set the state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-releasing process to set the state (4) to (5) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set the state (5) to (t) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set a state (t) to (2) of the M.sub.2 kg of working medium, performing a pressurization process to set a state (4) to (6) of the (M.sub.1+M) kg of working medium, performing a heat-releasing and condensation process to set the state (6) to (r) of the (M.sub.1+M) kg of working medium, performing a depressurization process to set a state (r) to (s) of the M kg of working medium, performing a heat-absorption and vaporization process to set the state (s) to (t) of the M kg of working medium, performing a heat-releasing process to set a state (r) to (7) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (7) to (1) of the M.sub.1 kg of working medium.

15. A reversed single-working-medium vapor combined cycle method consisting of twelve processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set a state (4) to (5) of the (M.sub.2−M) kg of working medium, performing a heat-releasing process to set the state (5) to (6) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set the state (6) to (t) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set a state (t) to (2) of the M.sub.2 kg of working medium, performing a heat-releasing and condensation process to set a state (4) to (r) of the (M.sub.1+M) kg of working medium, performing a depressurization process to set a state (r) to (s) of the M kg of working medium, performing a heat-absorption and vaporization process to set the state (s) to (t) of the M kg of working medium, performing a heat-releasing process to set a state (r) to (7) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (7) to (1) of the M.sub.1 kg of working medium.

16. A reversed single-working-medium vapor combined cycle method consisting of thirteen processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-absorption process to set a state (3) to (4) of the (M.sub.2−M) kg of working medium, performing a pressurization process to set the state (4) to (5) of the (M.sub.2−M) kg of working medium, performing a heat-releasing process to set the state (5) to (6) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set the state (6) to (t) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set a state (t) to (2) of the M.sub.2 kg of working medium, performing a pressurization process to set a state (3) to (7) of the (M.sub.1+M) kg of working medium, performing a heat-releasing and condensation process to set the state (7) to (r) of the (M.sub.1+M) kg of working medium, performing a depressurization process to set a state (r) to (s) of the M kg of working medium, performing a heat-absorption and vaporization process to set the state (s) to (t) of the M kg of working medium, performing a heat-releasing process to set a state (r) to (8) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (8) to (1) of the M.sub.1 kg of working medium.

17. A reversed single-working-medium vapor combined cycle method consisting of thirteen processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a pressurization process to set the state (3) to (4) of the (M.sub.2−M) kg of working medium, performing a heat-releasing process to set the state (4) to (5) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set the state (5) to (t) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set a state (t) to (2) of the M.sub.2 kg of working medium, performing a heat-absorption process to set a state (3) to (6) of the (M.sub.1+M) kg of working medium, performing a pressurization process to set the state (6) to (7) of the (M.sub.1+M) kg of working medium, performing a heat-releasing and condensation process to set the state (7) to (r) of the (M.sub.1+M) kg of working medium, performing a depressurization process to set a state (r) to (s) of the M kg of working medium, performing a heat-absorption and vaporization process to set the state (s) to (t) of the M kg of working medium, performing a heat-releasing process to set a state (r) to (8) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (8) to (1) of the M.sub.1 kg of working medium.

18. A reversed single-working-medium vapor combined cycle method consisting of fourteen processes which are conducted with M.sub.1 kg of working medium and M.sub.2 kg of working medium separately or jointly: performing a heat-absorption and vaporization process to set a state (1) to (2) of the M.sub.1 kg of working medium, performing a heat-absorption process to set a state (2) to (3) of the (M.sub.1+M.sub.2) kg of working medium, performing a heat-absorption process to set a state (3) to (4) of the (M.sub.1+M.sub.2−X) kg of working medium, performing a pressurization process to set the state (4) to (5) of the (M.sub.1+M.sub.2−X) kg of working medium, performing a heat-releasing process to set the state (5) to (6) of the (M.sub.1+M.sub.2−X) kg of working medium, performing a pressurization process to set a state (3) to (6) of the X kg of working medium, performing a heat-releasing process to set a state (6) to (7) of the (M.sub.1+M.sub.2) kg of working medium, performing a depressurization process to set a state (7) to (t) of the (M.sub.2−M) kg of working medium, performing a depressurization process to set a state (t) to (2) of the M.sub.2 kg of working medium, performing a heat-releasing and condensation process to set a state (7) to (r) of the (M.sub.1+M) kg of working medium, performing a depressurization process to set a state (r) to (s) of the M kg of working medium, performing a heat-absorption and vaporization process to set the state (s) to (t) of the M kg of working medium, performing a heat-releasing process to set a state (r) to (8) of the M.sub.1 kg of working medium, performing a depressurization process to set the state (8) to (1) of the M.sub.1 kg of working medium.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0024] FIG. 1 is a type 1 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0025] FIG. 2 is a type 2 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0026] FIG. 3 is a type 3 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0027] FIG. 4 is a type 4 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0028] FIG. 5 is a type 5 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0029] FIG. 6 is a type 6 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0030] FIG. 7 is a type 7 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0031] FIG. 8 is a type 8 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0032] FIG. 9 is a type 9 example general flow chart of a single-working-medium combined cycle provided in the present invention.

[0033] FIG. 10 is a type 10 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0034] FIG. 11 is a type 11 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0035] FIG. 12 is a type 12 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0036] FIG. 13 is a type 13 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0037] FIG. 14 is a type 14 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0038] FIG. 15 is a type 15 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0039] FIG. 16 is a type 16 example general flow chart of a single-working-medium combined cycle provided in the present invention.

[0040] FIG. 17 is a type 17 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

[0041] FIG. 18 is a type 18 example general flow chart of a reversed single-working-medium vapor combined cycle provided in the present invention.

DETAILED DESCRIPTION

[0042] The first thing to note is that, in terms of the process description, it shall not be repeated under unnecessary circumstances, and the obvious process shall not be described. The detailed description of the present invention is as follows:

[0043] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 1 works as follows:

[0044] (1) From the perspective of the cycle's processes.

[0045] The working medium conducts seven processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 4-5 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 5-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 5-6 of the M.sub.1 kg of working medium, a depressurization process 6-1 of the M.sub.1 kg of working medium.

[0046] (2) From the perspective of energy conversion.

[0047] {circle around (1)} Heat-releasing processes. Generally, the heat released in the process 4-5 of the (M.sub.1+M.sub.2) kg of working medium is used to satisfy the heat demand of the heated medium, or to satisfy the heat demands of both the heated medium and the process 2-3 (regeneration). The heat released in the process 5-6 of the M.sub.1 kg of working medium is mainly used to satisfy the heat demand of the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, or to satisfy the heat demands of both the heated medium and the process 2-3.

[0048] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or a low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration.

[0049] {circle around (3)} Energy conversion processes. The process 3-4 of the (M.sub.1+M.sub.2) kg of working medium is generally achieved by a compressor and requires mechanical work. The process 5-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 6-1 of the M.sub.1 kg of working medium can be achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0050] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 2 works as follows:

[0051] (1) From the perspective of the cycle's processes.

[0052] The working medium conducts eight processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 4-5 of the M.sub.2 kg of working medium, a depressurization process 5-2 of the M.sub.2 kg of working medium, a pressurization process 4-6 of the M.sub.1 kg of working medium, a heat-releasing and condensation process 6-7 of the M.sub.1 kg of working medium, a depressurization process 7-1 of the M.sub.1 kg of working medium.

[0053] (2) From the perspective of energy conversion.

[0054] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 4-5 of the M.sub.2 kg of working medium and the process 6-7 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3.

[0055] {circle around (3)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration.

[0056] {circle around (3)} Energy conversion processes. The process 3-4 of the (M.sub.1+M.sub.2) kg of working medium and the process 4-6 of the M.sub.1 kg of working medium are generally achieved by compressors and require mechanical work. The process 5-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 7-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0057] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 3 works as follows:

[0058] (1) From the perspective of the cycle's processes.

[0059] The working medium conducts eight processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 4-5 of the M.sub.2 kg of working medium, a heat-releasing process 5-6 of the M.sub.2 kg of working medium, a depressurization process 6-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 4-7 of the M.sub.1 kg of working medium, a depressurization process 7-1 of the M.sub.1 kg of working medium.

[0060] (2) From the perspective of energy conversion.

[0061] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 5-6 of the M.sub.2 kg of working medium and the process 4-7 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3.

[0062] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration.

[0063] {circle around (3)} Energy conversion processes. The process 3-4 of the (M.sub.1+M.sub.2) kg of working medium and the process 4-5 of the M.sub.2 kg of working medium are generally achieved by compressors and require mechanical work. The process 6-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 7-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0064] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 4 works as follows:

[0065] (1) From the perspective of the cycle's processes.

[0066] The working medium conducts nine processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a heat-absorption process 3-4 of the M.sub.2 kg of working medium, a pressurization process 4-5 of the M.sub.2 kg of working medium, a heat-releasing process 5-6 of the M.sub.2 kg of working medium, a depressurization process 6-2 of the M.sub.2 kg of working medium, a pressurization process 3-7 of the M.sub.1 kg of working medium, a heat-releasing and condensation process 7-8 of the M.sub.1 kg of working medium, a depressurization process 8-1 of the M.sub.1 kg of working medium.

[0067] (2) From the perspective of energy conversion.

[0068] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 5-6 of the M.sub.2 kg of working medium and the process 7-8 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the M.sub.2 kg of working medium in process 3-4.

[0069] {circle around (3)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat demand of the M.sub.2 kg of working medium in process 3-4 can be met by the regeneration.

[0070] {circle around (3)} Energy conversion processes. The process 3-7 of the M.sub.1 kg of working medium and the process 4-5 of the M.sub.2 kg of working medium are generally achieved by compressors and require mechanical work. The process 6-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 8-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0071] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 5 works as follows:

[0072] (1) From the perspective of the cycle's processes.

[0073] The working medium conducts nine processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the M.sub.2 kg of working medium, a heat-releasing process 4-5 of the M.sub.2 kg of working medium, a depressurization process 5-2 of the M.sub.2 kg of working medium, a heat-absorption process 3-6 of the M.sub.1 kg of working medium, a pressurization process 6-7 of the M.sub.1 kg of working medium, a heat-releasing and condensation process 7-8 of the M.sub.1 kg of working medium, a depressurization process 8-1 of the M.sub.1 kg of working medium.

[0074] (2) From the perspective of energy conversion.

[0075] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 4-5 of the M.sub.2 kg of working medium and the process 7-8 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the M.sub.1 kg of working medium in process 3-6.

[0076] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat demand of the M.sub.1 kg of working medium in process 3-6 can be met by the regeneration.

[0077] {circle around (3)} Energy conversion processes. The process 6-7 of the M.sub.1 kg of working medium and the process 3-4 of the M.sub.2 kg of working medium are generally achieved by compressors and require mechanical work. The process 5-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 8-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0078] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 6 works as follows:

[0079] (1) From the perspective of the cycle's processes.

[0080] The working medium conducts ten processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a heat-absorption process 3-4 of the (M.sub.1+M.sub.2−X) kg of working medium, a pressurization process 4-5 of the (M.sub.1+M.sub.2−X) kg of working medium, a heat-releasing process 5-6 of the (M.sub.1+M.sub.2−X) kg of working medium, a pressurization process 3-6 of the X kg of working medium, a heat-releasing process 6-7 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 7-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 7-8 of the M.sub.1 kg of working medium, a depressurization process 8-1 of the M.sub.1 kg of working medium.

[0081] (2) From the perspective of energy conversion.

[0082] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 5-6 of the (M.sub.1+M.sub.2−X) kg of working medium, the process 6-7 of the (M.sub.1+M.sub.2) kg of working medium and the process 7-8 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the (M.sub.1+M.sub.2−X) kg of working medium in process 3-4.

[0083] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration. The heat absorbed in the process 3-4 of the (M.sub.1+M.sub.2−X) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration.

[0084] {circle around (3)} Energy conversion processes. The process 4-5 of the (M.sub.1+M.sub.2−X) kg of working medium and the process 3-6 of the X kg of working medium are generally achieved by compressors and require mechanical work. The process 7-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 8-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0085] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 7 works as follows:

[0086] (1) From the perspective of the cycle's processes.

[0087] The working medium conducts nine processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 4-5 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 5-a of the M.sub.2 kg of working medium, a heat-absorption process a-b of the M.sub.2 kg of working medium, a depressurization process b-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 5-6 of the M.sub.1 kg of working medium, a depressurization process 6-1 of the M.sub.1 kg of working medium.

[0088] (2) From the perspective of energy conversion.

[0089] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 4-5 of the (M.sub.1+M.sub.2) kg of working medium and the process 5-6 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the M.sub.2 kg of working medium in process a-b.

[0090] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process a-b of the M.sub.2 kg of working medium comes from regeneration, or the external heat sources.

[0091] {circle around (3)} Energy conversion processes. The process 3-4 of the (M.sub.1+M.sub.2) kg of working medium is generally completed by the compressor and requires mechanical energy. The process 5-a and process b-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 6-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0092] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 8 works as follows:

[0093] (1) From the perspective of the cycle's processes.

[0094] The working medium conducts ten processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 4-5 of the M.sub.2 kg of working medium, a depressurization process 5-a of the M.sub.2 kg of working medium, a heat-absorption process a-b of the M.sub.2 kg of working medium, a depressurization process b-2 of the M.sub.2 kg of working medium, a pressurization process 4-6 of the M.sub.1 kg of working medium, a heat-releasing and condensation process 6-7 of the M.sub.1 kg of working medium, a depressurization process 7-1 of the M.sub.1 kg of working medium.

[0095] (2) From the perspective of energy conversion.

[0096] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 4-5 of the M.sub.2 kg of working medium and the process 6-7 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the M.sub.2 kg of working medium in process a-b.

[0097] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process a-b of the M.sub.2 kg of working medium comes from regeneration, or the external heat sources.

[0098] {circle around (3)} Energy conversion processes. The process 3-4 of the (M.sub.1+M.sub.2) kg of working medium and the process 4-6 of the M.sub.1 kg of working medium are generally achieved by compressors and require mechanical work. The process 5-a and process b-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 7-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0099] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 9 works as follows:

[0100] (1) From the perspective of the cycle's processes.

[0101] The working medium conducts ten processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 4-5 of the M.sub.2 kg of working medium, a heat-releasing process 5-6 of the M.sub.2 kg of working medium, a depressurization process 6-a of the M.sub.2 kg of working medium, a heat-absorption process a-b of the M.sub.2 kg of working medium, a depressurization process b-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 4-7 of the M.sub.1 kg of working medium, a depressurization process 7-1 of the M.sub.1 kg of working medium.

[0102] (2) From the perspective of energy conversion.

[0103] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 5-6 of the M.sub.2 kg of working medium and the process 4-7 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the M.sub.2 kg of working medium in process a-b.

[0104] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process a-b of the M.sub.2 kg of working medium comes from regeneration, or the external heat sources.

[0105] {circle around (3)} Energy conversion processes. The process 3-4 of the (M.sub.1+M.sub.2) kg of working medium and the process 4-5 of the M.sub.2 kg of working medium are generally achieved by compressors and require mechanical work. The process 6-a and process b-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 7-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0106] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 10 works as follows:

[0107] (1) From the perspective of the cycle's processes.

[0108] The working medium conducts eleven processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a heat-absorption process 3-4 of the M.sub.2 kg of working medium, a pressurization process 4-5 of the M.sub.2 kg of working medium, a heat-releasing process 5-6 of the M.sub.2 kg of working medium, a depressurization process 6-a of the M.sub.2 kg of working medium, a heat-absorption process a-b of the M.sub.2 kg of working medium, a depressurization process b-2 of the M.sub.2 kg of working medium, a pressurization process 3-7 of the M.sub.1 kg of working medium, a heat-releasing and condensation process 7-8 of the M.sub.1 kg of working medium, a depressurization process 8-1 of the M.sub.1 kg of working medium.

[0109] (2) From the perspective of energy conversion.

[0110] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 5-6 of the M.sub.2 kg of working medium and the process 7-8 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the M.sub.2 kg of working medium in process a-b.

[0111] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process 3-4 of the M.sub.2 kg of working medium comes from regeneration. The heat absorbed in the process a-b of the M.sub.2 kg of working medium comes from regeneration, or the external heat sources.

[0112] {circle around (3)} Energy conversion processes. The process 3-7 of the M.sub.1 kg of working medium and the process 4-5 of the M.sub.2 kg of working medium are generally achieved by compressors and require mechanical work. The process 6-a and process b-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 8-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0113] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 11 works as follows:

[0114] (1) From the perspective of the cycle's processes.

[0115] The working medium conducts eleven processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the M.sub.2 kg of working medium, a heat-releasing process 4-5 of the M.sub.2 kg of working medium, a depressurization process 5-a of the M.sub.2 kg of working medium, a heat-absorption process a-b of the M.sub.2 kg of working medium, a depressurization process b-2 of the M.sub.2 kg of working medium, a heat-absorption process 3-6 of the M.sub.1 kg of working medium, a pressurization process 6-7 of the M.sub.1 kg of working medium, a heat-releasing and condensation process 7-8 of the M.sub.1 kg of working medium, a depressurization process 8-1 of the M.sub.1 kg of working medium.

[0116] (2) From the perspective of energy conversion.

[0117] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 4-5 of the M.sub.2 kg of working medium and the process 7-8 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3, the M.sub.1 kg of working medium in process 3-6 and the M.sub.2 kg of working medium in process a-b.

[0118] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process 3-6 of the M.sub.1 kg of working medium comes from regeneration. The heat absorbed in the process a-b of the M.sub.2 kg of working medium comes from regeneration, or the external heat sources.

[0119] {circle around (3)} Energy conversion processes. The process 6-7 of the M.sub.1 kg of working medium and the process 3-4 of the M.sub.2 kg of working medium are generally achieved by compressors and require mechanical work. The process 5-a and process b-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 8-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0120] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 12 works as follows:

[0121] (1) From the perspective of the cycle's processes.

[0122] The working medium conducts twelve processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a heat-absorption process 3-4 of the (M.sub.1+M.sub.2−X) kg of working medium, a pressurization process 4-5 of the (M.sub.1+M.sub.2−X) kg of working medium, a heat-releasing process 5-6 of the (M.sub.1+M.sub.2−X) kg of working medium, a pressurization process 3-6 of the X kg of working medium, a heat-releasing process 6-7 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 7-a of the M.sub.2 kg of working medium, a heat-absorption process a-b of the M.sub.2 kg of working medium, a depressurization process b-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 7-8 of the M.sub.1 kg of working medium, a depressurization process 8-1 of the M.sub.1 kg of working medium.

[0123] (2) From the perspective of energy conversion.

[0124] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 5-6 of the (M.sub.1+M.sub.2−X) kg of working medium, the process 6-7 of the (M.sub.1+M.sub.2) kg of working medium and the process 7-8 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3, the M.sub.1 kg of working medium in process 3-6 and the M.sub.2 kg of working medium in process a-b.

[0125] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process 3-4 of the (M.sub.1+M.sub.2−X) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process a-b of the M.sub.2 kg of working medium comes from regeneration, or the external heat sources.

[0126] {circle around (3)} Energy conversion processes. The process 4-5 of the (M.sub.1+M.sub.2−X) kg of working medium and the process 3-6 of the X kg of working medium are generally achieved by compressors and require mechanical work. The process 7-a and process b-2 of the M.sub.2 kg of working medium is achieved by an expander and provides mechanical work. The process 8-1 of the M.sub.1 kg of working medium is achieved by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0127] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 13 works as follows:

[0128] (1) From the perspective of the cycle's processes.

[0129] The working medium conducts eleven processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 4-5 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 5-t of the (M.sub.2−M) kg of working medium, a depressurization process t-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 5-r of the (M.sub.1+M) kg of working medium, a depressurization process r-s of the M kg of working medium, a heat-absorption vaporization process s-t of the M kg of working medium, a heat-releasing process r-6 of the M.sub.1 kg of working medium, a depressurization process 6-1 of the M.sub.1 kg of working medium.

[0130] (2) From the perspective of energy conversion.

[0131] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 4-5 of the (M.sub.1+M.sub.2) kg of working medium, the process 5-r of the (M.sub.1+M) kg of working medium and the r-6 process of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the M kg of working medium in process s-t.

[0132] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process s-t of the M kg of working medium comes from regeneration.

[0133] {circle around (3)} Energy conversion processes. The process 3-4 of the (M.sub.1+M.sub.2) kg of working medium is generally completed by the compressor and requires mechanical energy. The process 5-t of the (M.sub.1−M) kg of working medium and the process t-2 of the M.sub.2 kg of working medium are completed by the expander and provides mechanical energy. The process r-s of the M kg of working medium and the process 6-1 of the M.sub.1 kg of working medium are completed by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0134] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 14 works as follows:

[0135] (1) From the perspective of the cycle's processes.

[0136] The working medium conducts twelve processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a heat-releasing process 4-5 of the (M.sub.2−M) kg of working medium, a depressurization process 5-t of the (M.sub.2−M) kg of working medium, a depressurization process t-2 of the M.sub.2 kg of working medium, a pressurization process 4-6 of the (M.sub.1+M) kg of working medium, a heat-releasing and condensation process 6-r of the (M.sub.1+M) kg of working medium, a depressurization process r-s of the M kg of working medium, a heat-absorption vaporization process s-t of the M kg of working medium, a heat-releasing process r-7 of the M.sub.1 kg of working medium, a depressurization process 7-1 of the

[0137] M.sub.1 kg of working medium.

[0138] (2) From the perspective of energy conversion.

[0139] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 4-5 of the (M.sub.2−M) kg of working medium and the 6-r process of the (M.sub.1+M) kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the M kg of working medium in process s-t. The heat release of the M.sub.1 kg of working medium in process r-7 is generally used for heating the low temperature section of the (M.sub.1+M.sub.2) kg of working medium in process 2-3.

[0140] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorption in the process s-t of the M kg of working medium comes from regeneration.

[0141] {circle around (3)} Energy conversion processes. The process 3-4 of the (M.sub.1+M.sub.2) kg of working medium and the process 4-6 of the (M.sub.1+M) kg of working medium are generally achieved by compressors and require mechanical work. The process 5-t of the (M.sub.1−M) kg of working medium and the process t-2 of the M.sub.2 kg of working medium are completed by the expander and provides mechanical energy. The process r-s of the M kg of working medium and the process 7-1 of the M.sub.1 kg of working medium are completed by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0142] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 15 works as follows:

[0143] (1) From the perspective of the cycle's processes.

[0144] The working medium conducts twelve processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 4-5 of the (M.sub.2−M) kg of working medium, a heat-releasing process 5-6 of the (M.sub.2−M) kg of working medium, a depressurization process 6-t of the (M.sub.2−M) kg of working medium, a depressurization process t-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 4-r of the (M.sub.1+M) kg of working medium, a depressurization process r-s of the M kg of working medium, a heat-absorption vaporization process s-t of the M kg of working medium, a heat-releasing process r-7 of the M.sub.1 kg of working medium, a depressurization process 7-1 of the M.sub.1 kg of working medium.

[0145] (2) From the perspective of energy conversion.

[0146] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 5-6 of the (M.sub.2−M) kg of working medium, the process 4-r of the (M.sub.1+M) kg of working medium and the process r-7 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3 and the M kg of working medium in process s-t.

[0147] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process s-t of the M kg of working medium comes from regeneration.

[0148] {circle around (3)} Energy conversion processes. The process 3-4 of the (M.sub.1+M.sub.2) kg of working medium and the process 4-5 of the (M.sub.2−M) kg of working medium are generally achieved by compressors and require mechanical work. The process 6-t of the (M.sub.2−M) kg of working medium and the process t-2 of the M.sub.2 kg of working medium are completed by the expander and provides mechanical energy. The process r-s of the M kg of working medium and the process 7-1 of the M.sub.1 kg of working medium are completed by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0149] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 16 works as follows:

[0150] (1) From the perspective of the cycle's processes.

[0151] The working medium conducts thirteen processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a heat-absorption process 3-4 of the (M.sub.2−M) kg of working medium, a pressurization process 4-5 of the (M.sub.2−M) kg of working medium, a heat-releasing process 5-6 of the (M.sub.2−M) kg of working medium, a depressurization process 6-t of the (M.sub.2−M) kg of working medium, a depressurization process t-2 of the M.sub.2 kg of working medium, a pressurization process 3-7 of the (M.sub.1+M) kg of working medium, a heat-releasing and condensation process 7-r of the (M.sub.1+M) kg of working medium, a depressurization process r-s of the M kg of working medium, a heat-absorption vaporization process s-t of the M kg of working medium, a heat-releasing process r-8 of the M.sub.1 kg of working medium, a depressurization process 8-1 of the M.sub.1 kg of working medium.

[0152] (2) From the perspective of energy conversion.

[0153] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 5-6 of the (M.sub.2−M) kg of working medium, the process 7-r of the (M.sub.1+M) kg of working medium and the process r-8 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3, the (M.sub.2−M) kg of working medium in process 3-4 and the M kg of working medium in process s-t.

[0154] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process 3-4 of the (M.sub.2−M) kg of working medium comes from regeneration. The heat absorbed in the process s-t of the M kg of working medium comes from regeneration.

[0155] {circle around (3)} Energy conversion processes. The process 3-7 of the (M.sub.1+M) kg of working medium and the process 4-5 of the (M.sub.2−M) kg of working medium are generally achieved by compressors and require mechanical work. The process 6-t of the (M.sub.2−M) kg of working medium and the process t-2 of the M.sub.2 kg of working medium are completed by the expander and provides mechanical energy. The process r-s of the M kg of working medium and the process 8-1 of the M.sub.1 kg of working medium are completed by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0156] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 17 works as follows:

[0157] (1) From the perspective of the cycle's processes.

[0158] The working medium conducts thirteen processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a pressurization process 3-4 of the (M.sub.2−M) kg of working medium, a heat-releasing process 4-5 of the (M.sub.2−M) kg of working medium, a depressurization process 5-t of the (M.sub.2−M) kg of working medium, a depressurization process t-2 of the M.sub.2 kg of working medium, a heat-absorption process 3-6 of the (M.sub.1+M) kg of working medium, a pressurization process 6-7 of the (M.sub.1+M) kg of working medium, a heat-releasing and condensation process 7-r of the (M.sub.1+M) kg of working medium, a depressurization process r-s of the M kg of working medium, a heat-absorption vaporization process s-t of the M kg of working medium, a heat-releasing process r-8 of the M.sub.1 kg of working medium, a depressurization process 8-1 of the M.sub.1 kg of working medium.

[0159] (2) From the perspective of energy conversion.

[0160] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 4-5 of the (M.sub.2−M) kg of working medium, the process 7-r of the (M.sub.1+M) kg of working medium and the process r-8 of the M.sub.1 kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3, the (M.sub.1+M) kg of working medium in process 3-6 and the M kg of working medium in process s-t.

[0161] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process 3-6 of the (M.sub.1+M) kg of working medium comes from regeneration. The heat absorbed in the process s-t of the M kg of working medium comes from regeneration.

[0162] {circle around (3)} Energy conversion processes. The process 6-7 of the (M.sub.1+M) kg of working medium and the process 3-4 of the (M.sub.2−M) kg of working medium are generally achieved by compressors and require mechanical work. The process 5-t of the (M.sub.2−M) kg of working medium and the process t-2 of the M.sub.2 kg of working medium are completed by the expander and provides mechanical energy. The process r-s of the M kg of working medium and the process 8-1 of the M.sub.1 kg of working medium are completed by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0163] The T-s diagram of the reversed single-working-medium vapor combined cycle in FIG. 18 works as follows:

[0164] (1) From the perspective of the cycle's processes.

[0165] The working medium conducts fourteen processes: a heat-absorption vaporization process 1-2 of the M.sub.1 kg of working medium, a heat-absorption process 2-3 of the (M.sub.1+M.sub.2) kg of working medium, a heat-absorption process 3-4 of the (M.sub.1+M.sub.2−X) kg of working medium, a pressurization process 4-5 of the (M.sub.1+M.sub.2−X) kg of working medium, a heat-releasing process 5-6 of the (M.sub.1+M.sub.2−X) kg of working medium, a pressurization process 3-6 of the X kg of working medium, a heat-releasing process 6-7 of the (M.sub.1+M.sub.2) kg of working medium, a depressurization process 7-t of the (M.sub.2−M) kg of working medium, a depressurization process t-2 of the M.sub.2 kg of working medium, a heat-releasing and condensation process 7-r of the (M.sub.1+M) kg of working medium, a depressurization process r-s of the M kg of working medium, a heat-absorption vaporization process s-t of the M kg of working medium, a heat-releasing process r-8 of the M.sub.1 kg of working medium, a depressurization process 8-1 of the M.sub.1 kg of working medium.

[0166] (2) From the perspective of energy conversion.

[0167] {circle around (1)} Heat-releasing processes. Aiming at the heat released in the process 5-6 of the (M.sub.1+M.sub.2−X) kg of working medium, the process 6-7 of the (M.sub.1+M.sub.2) kg of working medium and the process 7-r of the (M.sub.1+M) kg of working medium, the relatively high-temperature parts are generally used to satisfy the heat demand of the heated medium, and the relatively low-temperature parts are generally used to satisfy the heat demands of the (M.sub.1+M.sub.2) kg of working medium in process 2-3, the (M.sub.1+M.sub.2−X) kg of working medium in process 3-4 and the M kg of working medium in process s-t.

[0168] {circle around (2)} Heat absorption processes. Generally, the M.sub.1 kg of working medium in the process 1-2 obtains the low-temperature heat load which is provided by the refrigerated medium or the low-temperature heat source. The heat absorbed in the process 2-3 of the (M.sub.1+M.sub.2) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process 3-4 of the (M.sub.1+M.sub.2−X) kg of working medium comes from the low-temperature heat load, or partly comes from the low-temperature heat load and partly comes from regeneration, or totally comes from regeneration. The heat absorbed in the process s-t of the M kg of working medium comes from regeneration.

[0169] {circle around (3)} Energy conversion processes. The process 4-5 of the (M.sub.1+M.sub.2−X) kg of working medium and the process 3-6 of the X kg of working medium are generally achieved by compressors and require mechanical work. The process 7-t of the (M.sub.2−M) kg of working medium and the process t-2 of the M.sub.2 kg of working medium are completed by the expander and provides mechanical energy. The process r-s of the M kg of working medium and the process 8-1 of the M.sub.1 kg of working medium are completed by a turbine or a throttle valve. The total expansion work output is less than the total pressurization work input, and the difference (the cycle's net work) is inputted from the outside. The reversed single-working-medium vapor combined cycle is completed.

[0170] The technical effects of the present invention: The reversed single-working-medium vapor combined cycle proposed by the present invention has the following effects and advantages:

[0171] (1) The present invention establishes a basic theory of the mechanical-energy-driven refrigeration and heating (energy quality difference utilization).

[0172] (2) The present invention eliminates or greatly reduces the exothermic load in the phase-change region, and correspondingly increases the exothermic load in the high-temperature region. Therefore, a reasonable coefficient of performance can be achieved.

[0173] (3) In the present invention, the ranges of the working medium's parameters are expanded greatly. Therefore, the high-efficiency and high-temperature heating can be achieved.

[0174] (4) The present invention provides a theoretical basis for reducing the operating pressure and improving the safety of the device.

[0175] (5) The present invention reduces the cycle's compression ratio, and leads to the convenience in selecting and manufacturing the cycle's core devices.

[0176] (6) The present invention possesses simple methods, reasonable processes and good applicability. It is a common technology to realize the effective utilization of energy grade differences.

[0177] (7) The present invention only uses a single working medium, which is easy to produce and store; The present invention can also reduce the operation cost and improve the flexibility of cycle regulation.

[0178] (8) The processes in the present invention are shared and reduced, which provides a theoretical basis for reducing equipment investment.

[0179] (9) In the high-temperature region or the variable temperature region, the temperature difference loss in heat transfer can be reduced, and the coefficient of performance can be improved.

[0180] (10) The present invention adopts the low-pressure and high-temperature operation mode in the high-temperature region; therefore, the contradiction among the coefficient of performance, the working medium's parameters and the material's temperature resistance and pressure resistance abilities, which is common in traditional refrigeration/heat pump devices, can be alleviated or solved.

[0181] (11) Under the precondition of achieving a high thermal efficiency, the present invention can operate at a low pressure. The present invention provides theoretical support for improving the safety of the device operation.

[0182] (12) The present invention possesses a wide range of applicable working media. The present invention can match energy supply with demand well. It is flexible to match the working medium and the working parameters.

[0183] (13) The present invention expands the range of thermodynamic cycles for mechanical-energy-driven refrigeration and heating, and is conducive to better realize the efficient utilization of mechanical energy in the fields of refrigeration, high-temperature heating and variable temperature heating.