Absorption heat pump unit, heat exchanger unit and heat supply system

Abstract

The invention relates to an absorption heat pump unit, a heat exchanger unit and a heat supply system. The absorption heat pump unit comprises a generator, a condenser, an absorber, an evaporator and a solution heat exchanger. The absorber at least comprises a first absorber body and a second absorber body, the evaporator at least comprises a first evaporator body and a second evaporator body, a solution outlet of the first absorber body is communicated with a solution inlet of the second absorber body, and a refrigerant water outlet of the first evaporator body is communicated with a refrigerant water inlet of the second evaporator body. The absorber bodies and the evaporator bodies are arranged, and therefore the overall heat power perfectness degree can be improved, and primary water return temperature can be lowered.

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to an absorption heat pump unit, a heat exchange unit and a heating system. Background technique [0002] The application of cogeneration central heating system in urban heating in northern my country is very common. Lowering the return water temperature of the primary network of the central heating system is conducive to recovering the condensation heat at the heat source of the cogeneration for heating, which can greatly improve the efficiency of the cogeneration system. [0003] The heat supply system in the prior art has adopted a heat exchange unit with an absorption heat pump, and the heat exchange unit with an absorption heat pump can reduce the return water temperature of the primary network at each thermal station of the heat network. However, a simple absorption circulation, single-stage heat pump heat exchange unit can only reduce the return water temperature of th...

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Problems solved by technology

However, the pure absorption cycle and single-stage heat pump heat exchange unit can only reduce the return water temperature of the primary network to above 30 °C when the water supply temperature of the primary network is low (such as 100 ° C ~ 110 ° C). The cooling capacity of the return water is insufficient, and the heat recovered from the condenser at the heat source is limited

[0004] At present, there is another compound heat exchange unit, which has an external series-connected compression heat pump unit, which can further reduce the return water temperature of the primary network, but requires an absorption heat pump and a compression heat pump to be connected in series, resulting in an increase in the volume of the unit. Big, rising cost, increasing primary network resistance

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