Refrigeration cycle system combining ammonia absorption and injection, and operation method

Abstract

The invention discloses a refrigeration cycle system combining ammonia absorption and injection. The refrigeration cycle system comprises an evaporator, a sub-cooler, a condenser, an absorber, a solution heat exchanger, a low-pressure generator, a rectifier, a fractional condenser, a high-pressure generator, an injector, a liquid reservoir and a solution pump; in the system disclosed by the invention, the generators work under low generation pressure at low heat source temperature, so that the ammonia concentration decreases at the end of the generation, the deflation ratio of the generators is improved, and low solution circulating ratio is obtained; then, condensate ammonia liquor pressurized through the solution pump is heated and vaporized into high-pressure saturated steam as the working steam of the injector; the injector is used for injecting the ammonia steam from the top of a rectifying tower, so that the ammonia steam is condensed in the condenser after the pressure of the rectifying tower is increased to the condensing pressure; the requirements of the generators for the heat source temperature are reduced greatly, and the problem of low working performance of the traditional single-stage ammonia absorption type refrigeration cycle system at low heat source temperature is solved; and the refrigeration cycle system is of great significance in driving ammonia absorption type refrigeration cycle with solar energy.

Description

technical field [0001] The invention relates to the technical field of refrigerating cycles, in particular to a refrigerating cycle system and an operating method for combining ammonia water absorption and spraying. Background technique [0002] The traditional ammonia absorption refrigeration cycle system on the market is composed of generators, condensers, evaporators, absorbers, circulation pumps, throttle valves and other components. agent, the two constitute a working fluid pair. The concentrated ammonia solution is heated in the generator, and a certain flow of refrigerant vapor is separated and enters the condenser. The refrigerant vapor is cooled in the condenser and condenses into a liquid state; the liquid refrigerant enters the evaporator after throttling and reducing pressure. , absorb heat and evaporate in the evaporator, resulting in a cooling effect, the refrigerant changes from liquid to gas, and then enters the absorber; in addition, the dilute solution flo...

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Problems solved by technology

However, the coefficient of performance is low, especially under the condition that the heat collection temperature of common solar collectors does not exceed 100°C, the application is limited to a certain extent

The reason is that driven by the lower temperature of the heat source, the range of deflation of the generator under the generation pressure (regardless of the flow resistance between the equipment, that is, the condensation pressure) is small or even impossible to complete the deflation, resulting in the conventional single-stage ammonia water absorption refrigeration cycle system Poor or even non-working performance

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