Two-stage first class absorption heat pump taking triple effect as first stage

Abstract

The invention provides a two-stage first class absorption heat pump taking triple effect as a first stage, which belongs to the technical fields of waste heat utilization and heat pump/refrigeration. The two-stage first class absorption heat pump comprises a heat pump with three heat supply ends consisting of a first absorber, a first generator, a second generator, a third generator, a second absorber, a fourth generator, a condenser, an evaporator, a first solution pump, a second solution pump or/and a third solution pump, a first throttle valve, a second throttle valve, a third throttle valve, a first solution heat exchanger, a second solution heat exchanger, a third solution heat exchanger, a fourth solution heat exchanger or/and a fifth solution heat exchanger; a heat pump with four power supply ends is formed by adding a second condenser and a fourth throttle valve; and the first generator provides driving steam for the second generator, the second generator driving steam for the third generator, the third generator provides refrigerant steam for the second absorber or/and the second condenser, the first absorber or/and the second condenser provides/provide a first-stage heat load, the fourth generator provides refrigerant steam for the condenser, and the second absorber and the condenser provide a second-stage heat load.

Description

Technical field: [0001] The invention belongs to the technical field of low-temperature waste heat utilization and heat pump / refrigeration. Background technique: [0002] Under the premise of meeting the heat demand of the heated medium, it is the primary principle that should be followed to make the performance index of the absorption heat pump / refrigeration unit as high as possible. Due to the diversification of the parameters of the refrigerated medium, the heated medium and the driving heat medium of the waste heat medium, heat pump processes with different working parameter ranges are required, that is, heat pump / refrigeration units with different thermodynamic parameters and thermodynamic performance are required to meet specific needs. . [0003] Among the absorption heat pumps, the three-effect first-type absorption heat pump has the advantage of high performance index, but it also has obvious shortcomings—it cannot have a wide heating temperature range and high hea...

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Problems solved by technology

[0004] The situation similar to this but different is that when the temperature range of the heated medium is wide and varied, the heat pump process using the above three heating ends has such a problem: when the temperature of the heated medium is low, the first The heat supply load of the two heat pump processes decreases accordingly, resulting in a decrease in the amount of refrigerant vapor in the entire heat pump process, and the performance index of the heat pump unit basically remains unchanged; at this time, the first heat pump process cannot exert its low heating temperature and performance The advantage of high index

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