Absorption-compression-type dual-purpose second species heat pump system

Abstract

The invention discloses an absorption-compression-type dual-purpose second species heat pump system, which comprises a cryogen pipeline system and a solution pipeline system. The cryogen pipeline system comprises a condenser, a first cryogen pump, an evaporator, a compressor, and a second cryogen pump. The solution pipeline system comprises a generator, a second absorber, a first absorber, a first solution heat exchanger, a first throttling element, a second solution heat exchanger, a second throttling element, and a solution pump. Compared with a traditional dual-purpose absorption type second species heat pump system, the invention is characterized in that the gas state cryogen outlet of the evaporator is not directly connected with the gas state cryogen inlet of the second absorber, instead, is connected to the air inlet of the compressor, and the outlet vent of the compressor is connected to the gas state cryogen inlet of the second absorber, resulting in running features different from those of the traditional dual-purpose absorption type second species heat pump system, namely, the gas state cryogen is compressed by the compressor, so that the absorption pressure of the second absorber is directly improved, and both the pressure and the heat supply temperature of the first absorber are improved.

Description

technical field [0001] The invention relates to an absorption-compression double-effect second-type heat pump system, which belongs to the technical field of refrigeration and air-conditioning equipment. The system adds a compressor on the basis of the double-effect second-type absorption heat pump system. It has the characteristics of high heating temperature, flexible adjustment, strong feasibility, hybrid drive, and low-grade heat source can be used. It is easy to popularize and apply. Background technique [0002] The second type of heat pump system (or heating type heat pump) is a device driven by a low-grade heat source to obtain a high-grade heat source. wide advantages. When the heating temperature is required to be high, the double-effect second-type heat pump system can be used, that is, the heat released by the low-pressure absorber is used as the internal heat source to evaporate the liquid refrigerant under high pressure, and the refrigerant vapor generated is ...

AI Technical Summary

Problems solved by technology

However, due to the coupling relationship between the heat release temperature of the low-pressure stage generator and the evaporation pressure of the high-pressure stage absorber in the traditional double-effect second-type heat pump, the heating temperature of the high-pressure stage absorber is limited and cannot be adjusted flexibly. When the temperature is low, the temperature rise of the heat supply temperature of the high-pressure absorber also decreases, thus affecting its scope of application

Although adopting three-effect or even four-effect second-type heat pump systems can solve this problem, the complexity of the system structure and control will also increase, and the technical and economic performance will deteriorate. Therefore, increasing the number of effects is not an effective way to solve this problem.

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