A self-cascading vapor compression refrigeration cycle system with gas-gas ejector synergies

Abstract

A gas-gas ejector-assisted self-cascading vapor compression refrigeration cycle system, the compressor, the condenser and the first gas-liquid separator are connected in sequence, and the outlet of the first gas-liquid separator is divided into two paths: one path is saturated The refrigerant gas outlet is connected to the working fluid inlet of the gas-gas ejector; another saturated refrigerant liquid outlet, the first throttling mechanism and the second gas-liquid separator inlet are connected in sequence. The outlet of the second gas-liquid separator is also divided into two paths: one outlet of saturated refrigerant liquid is connected to the inlet of the second throttling mechanism; the other outlet of saturated refrigerant gas is connected to the injection fluid inlet of the gas-gas injector. The outlet of the gas-gas ejector, the condensing side of the evaporative condenser, the third throttling mechanism and the evaporator are connected in sequence, and the connection of the evaporator outlet is divided into two situations: the outlet of the second throttling mechanism is connected to the inlet of the evaporating condenser first, The outlet of the evaporation side of the evaporator condenser merges with the outlet of the evaporator, and finally returns to the compressor to complete the cycle; or, the outlet of the evaporator first merges with the outlet of the second throttling structure, and then returns to the compressor through the evaporation side of the evaporator condenser to complete cycle.

Description

technical field [0001] The invention belongs to the technical field of refrigeration, and in particular relates to a self-cascading vapor compression refrigeration cycle system with synergistic effect of a gas-gas ejector. Background technique [0002] The self-cascading refrigeration system is a refrigeration system that can realize multi-stage automatic cascade and obtain a lower evaporation temperature by using only one compressor and using the characteristics of non-azeotropic refrigerants. Compared with the cascade refrigeration system, the self-cascade refrigeration system has only one compressor and a set of circulation loop system. The structure is relatively simple, easy to maintain, and the cost is lower. Therefore, it has been used more and more in the field of low temperature in recent years. However, the energy efficiency of self-cascading refrigeration systems is often relatively low, and energy conservation and emission reduction has become the mainstream of s...

AI Technical Summary

Problems solved by technology

However, the energy efficiency of self-cascading refrigeration systems is often relatively low, and energy conservation and emission reduction are becoming the mainstream of society, so how to improve the energy efficiency of self-cascading refrigeration systems has become one of its main development directions

In the conventional self-cascading refrigeration system, there is only one separation process of the high and low boiling point components of the refrigerant, and the separation of the high and low boiling point components of the refrigerant is not sufficient

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