Cold dynamic cycle refrigeration apparatus

Abstract

This invention is about a cold dynamic cycle refrigeration apparatus, which makes up cold energy with cryogenic liquid refrigerant by liquid circulating pump boosting, after its temperature is increased via the cold regenerator, it flows through the expander to reduce pressure and temperature to provide the cold to the refrigeration apparatus, and then returns to the refrigerant tank via the cold regenerator, so as to form the cold dynamic cycle circuit of the refrigerant. This invention requires no circulation cooling water system as in a traditional steam compression refrigeration apparatus, so its maintenance and operation cost can be substantially reduced, with an apparatus of the same refrigerating capacity, it can save energy by more than 30% as compared with traditional ones, producing substantial economic, social and environmental protection benefits.

Claims

1. A cold dynamic cycle refrigeration system, comprising: a refrigerant tank, a liquid refrigerant in the refrigerant tank, a liquid circulating pump, and a cold regenerator, an expander, and a cold consuming apparatus connected via a refrigerant conduit, wherein the liquid circulating pump draws the liquid refrigerant from the refrigerant tank and delivers the liquid refrigerant to the cold regenerator, wherein the liquid refrigerant vaporizes to form a gaseous refrigerant, the expander receives the gaseous refrigerant from the cold regenerator and expands the gaseous refrigerant so that a temperature and a pressure of the gaseous refrigerant decreases, and the cold consuming apparatus receives the gaseous refrigerant from the expander and absorb a cold energy therefrom; and wherein the gaseous refrigerant from the cold consuming apparatus cycles through the cold regenerator to the refrigerant tank, and wherein the refrigerant is a single-component low boiling point refrigerating medium having a boiling point below −10° C. under standard state, or a mixed refrigerating medium containing the refrigerating medium having the boiling point below −10° C. under standard state.

2. The system of claim 1, further comprising a throttle valve disposed in the refrigerant passage between the cold regenerator and the refrigerant tank.

3. The system of claim 1, further comprising a braking equipment disposed about the expander, wherein the braking equipment is a fan, a hydraulic pump, or a gas compressor.

4. The system of claim 1, wherein the refrigerant from the expander is fed to a second cold consuming apparatus and wherein an equal amount of liquid refrigerant is fed into the refrigerant tank.

5. The system of claim 3, wherein the refrigerant from the expander is fed to a second cold consuming apparatus and wherein an equal amount of liquid refrigerant is fed into the refrigerant tank.

6. The system of claim 2, further comprising a braking equipment disposed about the expander, wherein the braking equipment is a fan, a hydraulic pump, or a gas compressor.

7. The system of claim 2, wherein the refrigerant from the expander is fed to a second cold consuming apparatus and wherein an equal amount of liquid refrigerant is fed into the refrigerant tank.

8. The system of claim 1, wherein the refrigerant is liquid nitrogen.

9. The system of claim 1, wherein the expander and the cold generator are housed in a same insulated device.

Description

DESCRIPTION OF FIGURES

(1) FIG. 1 is a schematic diagram of a cold dynamic cycle refrigeration apparatus of this invention.

(2) In FIG. 1: 1—refrigerant tank, 2—liquid refrigerant, 3—liquid circulating pump, 4—cold regenerator, 5—gaseous refrigerant, 6—expander, 7—braking equipment, 8—cold consuming apparatus, 9—throttle valve.

EMBODIMENTS

(3) In the following, this invention is further described in detail in conjunction with figures and embodiments.

Embodiment 1

(4) As shown in FIG. 1, a cold dynamic cycle refrigeration apparatus, with the specific embodiment as follows:

(5) Liquid nitrogen is used as refrigerant.

(6) The liquid refrigerant 2 from refrigerant tank 1 is boosted by liquid circulating pump 3, to become gaseous refrigerant 5 via cold regenerator 4, then it flows via expander 6, cold consuming apparatus 8, cold regenerator 4 and throttle valve 10, and returns to the refrigerant tank 1, so as to form the cold dynamic cycle circuit of the refrigerating media.

(7) The braking equipment of the said expander is a hydraulic pump, as a booster pump of liquid nitrogen.

(8) The said cold regenerator 4 is a traditional plate-fin heat exchanger or micro channel heat exchanger.

(9) The said refrigerant tank 1 is an insulated vacuum container, and pearlite is used as insulation materials.

(10) The equipment and their backup systems, pipes, instruments, valves, cold insulation and bypass facilities with regulation functions not described in this invention shall be configured with mature technologies of generally known traditional refrigerating cycles.

(11) Safety and regulation and control facilities associated with the refrigerating cycle apparatus of this invention are provided, so that the apparatus can operate economically and safely with high thermal efficiency, to achieve the goal of energy conservation, consumption reduction and environmental protection.

(12) This invention has been made public with an optimum embodiment as above, however, it is not used to restrict this invention, all variations or decorations made by those familiar with this technology without deviating from the spirit and scope of this invention also falls into the scope of protection of this invention. Therefore, the scope of protection of this invention shall be that defined by the claims in this application.