A low-grade heat source driven jet refrigeration system and refrigeration method

Abstract

The invention discloses a low-grade heat source-driven ejector refrigeration system and refrigeration method, comprising: the primary flow input end of the ejector is connected to the output end of the generator, and the secondary flow input end of the ejector is connected to the output end of the evaporator , the output end of the injector is divided into two paths, one is connected to the input end of the condenser, and the other is connected to the input end of the supercharger; the output end of the supercharger is connected to the input end of the generator, so The output end of the above-mentioned condenser is connected with the input end of the evaporator; the beneficial effect of the present invention is that since the system recycles the mixed flow, a large amount of heat in the mixed flow can be used again, so that the system's heat demand is reduced, and the heat source requirement It has also been reduced, which effectively reduces the high dependence of the ejector air conditioning system on heat and increases the stability of the system.

Description

technical field [0001] The invention relates to a low-grade heat source driving system, in particular to a low-grade heat source-driven spray refrigeration system and a refrigeration method. Background technique [0002] Ejector refrigeration systems are driven by the absorption of heat from a low-grade heat source and are widely used because of their simplicity and no moving parts. When the ejector is working, the refrigeration system is driven by a low-grade heat source, which provides a very promising way to solve the current energy shortage, but the ejector refrigeration has the problem of low heat source utilization, and its COP is generally lower than 0.3. The amount of heat required by the system is also greatly increased. After the low-grade heat source drives the ejector to do work, in order to enter the next cycle, it must be condensed through the heat dissipation of the condenser. In the existing refrigeration system, it is often to condense all the mixed flow o...

AI Technical Summary

Problems solved by technology

In the existing refrigeration system, it is often to condense all the mixed flow output by the ejector and then divide it or to condense part of the mixed flow output by the ejector and then divide it; The high-temperature steam that needs to be condensed does work, which wastes part of the work of the condenser and increases the heat dissipation of the condenser

[0003] Therefore, the cooling capacity and external dimensions of the condenser required by the above method are relatively large, which increases the cost and hinders popularization and application; at the same time, a large amount of heat lost through the condenser cannot be fully utilized, which also reduces the utilization efficiency of the heat source

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