Azeotrope to azeotrope-like composition containing 1-chloro-3,3,3-trifluoropropene and 1,1,1,3,3-pentafluoropropane

Abstract

The problem to be solved by the present invention is to provide a novel mixed refrigerant that can be an alternative for HCFC-123, has a low ODP and a low GWP, has a COP equal to that of HCFC-123, and has a refrigerating capacity and gas density higher than those of single refrigerants, such as HCFO-1233zd(E) and HFC-245fa, which are being considered as alternative refrigerants for HCFC-123. A composition comprising a refrigerant, wherein the refrigerant comprises HCFO-1233zd(E) and HFC-245fa, and has a mass ratio of HCFO-1233zd(E) to HFC-245fa of 18:82 to 49:51 is provided as a means for solving the above problem.

Claims

1. A composition consisting of a refrigerant and a refrigerant oil, wherein the refrigerant consists of HCFO-1233zd(E) and HFC-245fa, and has a mass ratio of HCFO-1233zd(E) to HFC-245fa of 18:82 to 49:51.

2. A composition consisting of a refrigerant and a refrigerant oil, wherein the refrigerant consists of HCFO-1233zd(E) and HFC-245fa, and has a mass ratio of HCFO-1233zd(E) to HFC-245fa of 29:71 to 38:62.

3. A composition consisting of a refrigerant and a refrigerant oil, wherein the refrigerant is an azeotropic or azeotrope-like composition consisting of HCFO-1233zd(E) and HFC-245fa.

4. The composition according to claim 1, wherein the refrigerant oil is at least one member selected from the group consisting of polyalkylene glycol (PAG), polyol ester (POE), and polyvinyl ether (PVE).

5. A freezing method comprising the step of operating a refrigeration cycle using the composition according to claim 1.

6. A method for operating a large chiller refrigerator, comprising the step according to claim 5.

7. A freezing method comprising the step of operating a refrigeration cycle using the composition according to claim 1, wherein the refrigerant is used as an alternative refrigerant for 2,2-dichloro-1,1,1-trifluoroethane (HCFC-123).

8. A refrigerator comprising the composition according to claim 1.

9. The refrigerator according to claim 8, which is a large chiller refrigerator.

Description

EXAMPLES

(1) The present invention is described below with reference to Examples; however, the present invention is not limited thereto.

(2) The compositions of the present invention (Examples 1 to 4) shown in Table 1 were used as a working fluid in a cooling system (single-stage vapor-compression refrigeration cycle). Further, the compositions of Comparative Examples 1 to 6 shown in Table 1 were similarly used in the same cooling system.

(3) The operating conditions of the system were as follows: condenser temperature: 5 C., evaporator temperature: 45 C., degree of superheat: 2 K, and degree of supercooling: 8 K.

(4) The COP, refrigerating capacity (kJ/m.sup.3), and gas density were measured in each of the Examples and Comparative Examples. Table 2 shows values relative to the value (100) of HFC-245fa alone, which has the highest refrigerating capacity among HCFC-123, HCFO-1233zd(E), and HFC-245fa.

(5) TABLE-US-00001 TABLE 1 (Mass %) HCFO- HFC- HCFC- HFC- 1233zd (E) 245fa 123 365mfc Example 1 18 82 0 0 Example 2 29 71 0 0 Example 3 38 62 0 0 Example 4 49 51 0 0 Comparative 0 100 0 0 Example 1 Comparative 60 40 0 0 Example 2 Comparative 100 0 0 0 Example 3 Comparative 0 0 100 0 Example 4 Comparative 99.9 0 0 0.1 Example 5 Comparative 89 0 0 11 Example 6

(6) TABLE-US-00002 TABLE 2 Refrigerating Gas COP capacity density Example 1 100 104 105 Example 2 100 105 107 Example 3 100 105 107 Example 4 100 104 106 Comparative 100 100 100 Example 1 Comparative 100 102 103 Example 2 Comparative 100 88 86 Example 3 Comparative 101 69 69 Example 4 Comparative 101 88 87 Example 5 Comparative 101 82 81 Example 6

(7) The results demonstrate that the mixtures of HCFO123zd (E) and HFC-245fa in the composition ranges shown in Examples 1 to 4, that is, HCFO-1233zd(E)/HFC-245fa=18 to 49/51 to 82 mass %, had a COP equivalent to that of HCFC-123 used as a single refrigerant, and had a superior refrigerating capacity and gas density to those of HCFC-123, HCFO-1233zd(E), or HFC-245fa, each of which was used as a single refrigerant.

(8) Furthermore, the results of the Examples were superior to Comparative Example 2 (HCFO-1233zd(E)/HFC-245fa=60/40 mass %) in refrigerating capacity and gas density. It was revealed that, among the compositions comprising HCFO-1233zd(E) and HFC-245fa, the refrigerants having the compositions shown in the Examples were particularly excellent.