Low-temperature heat supply terminal increased double-generator absorption heat pump

Abstract

The invention relates to a double-generator absorption heat pump which increases a low-temperature heat supply end, which belongs to the technical field of heat pump / refrigeration. A condenser and a throttle valve are increased in a two-stage heat pump which supplies refrigerant vapor to an absorber through an absorber-evaporator and a low pressure generator, wherein the increased condenser is provided with a pipeline which is communicated with an evaporator and the absorber-evaporator through the increased throttle valve; an increased refrigerant vapor channel of the low pressure generator is communicated with the increased condenser; and the increased condenser is provided with a heated medium pipeline which is communicated with the outside. Or an absorber, a solution pump and a solution heat exchanger are increased in the two-stage heat pump which supplies refrigerant vapor to the absorber through the absorber-evaporator and the low pressure generator, wherein the low pressure generator is provided with a pipeline which is communicated with the increased absorber through the increased solution heat exchanger; the increased absorber is provided with a pipeline which is communicated with the absorber-evaporator through the solution heat exchanger and the solution pump; the absorber-evaporator is communicated with the low pressure generator through the solution pump and the solution heat exchanger; the increased refrigerant vapor channel of the evaporator is communicated with the increased absorber; and the increased absorber is provided with a heated medium pipeline which is communicated with the outside. The increased condenser or the increased absorber is taken as the low-temperature heat supply end of a composite heat pump, so that the performance index of a unit is improved and waste heat can be more fully utilized for refrigeration.

Description

Technical field: [0001] The invention belongs to the technical field of low-temperature waste heat utilization and heat pump / refrigeration. Background technique: [0002] For a certain waste heat resource, the performance index of low-order heat pumps is high but the heating temperature is low, and the performance index of high-order heat pumps is low but the heating temperature is high; Compared with heat pumps, the waste heat temperature required by the former is higher than that of the latter; in addition, the performance index between different stages of heat pumps is jumping and incoherent. In this way, the use of a single-stage heat pump has certain limitations, and a single-stage heat pump often cannot meet the heat demand of heat users or cannot fully utilize waste heat resources. When the temperature demand of the heated medium is inconsistent with the heating range corresponding to a certain number of heat pumps, a joint heating system composed of different stages...

AI Technical Summary

Problems solved by technology

However, as a unit with a single stage, when the initial temperature of the heated medium is relatively low and the temperature range is wide, although the unit can meet the heat demand of the heated medium, the initial temperature of the heated medium For the heating section, the performance index of the unit is relatively low compared to the use of low-level heat pump processes to complete the heat supply of the heating section.

However, when the waste heat is used for refrigeration, the initial temperature of the waste heat is relatively high and the temperature drop of the waste heat is large, although the unit can deeply use the heat release of the waste heat medium to cool, but for the initial temperature range of the waste heat medium, The benefit of the unit using this temperature range for cooling is relatively low

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