Heat exchanger unit

Abstract

The invention provides a heat exchanger unit which comprises a hot water type absorption heat pump, a water-water heat exchanger, a primary side pipeline and a secondary side pipeline. The hot water type absorption heat pump comprises a generator, a condenser, an absorber and an evaporator. A water supply pipe of the primary side pipeline is sequentially communicated with the high-temperature side of the water-water heat exchanger, the evaporator and a water returning pipe of the primary side pipeline, and the water returning pipe of the primary side pipeline is connected to a heat source. A water supply pipe of the secondary side pipeline comprises a first branch and a second branch, the first branch is sequentially communicated with the absorber, the condenser and a water returning pipe of the secondary side pipeline, and the second branch is sequentially communicated with the low-temperature side of the water-water heat exchanger and the generator and then is combined with the water returning pipe of the secondary side pipeline. According to the heat exchanger unit, the water inlet resistance of a primary network is reduced, and the temperature of returning water of the primary network is reduced. Thus, the heat, recycled at the heat source, of the condenser is improved, and the efficiency of a combined heat and power generator central heat supplying system is improved.

Description

technical field [0001] The invention relates to the technical field of heating equipment, in particular to a heat exchange unit. Background technique [0002] Generally, urban heat supply adopts cogeneration centralized heating system, but the efficiency of cogeneration system is low due to the high return water temperature of the primary network in the existing heating system. At present, ZL2008101010645 proposes a heat exchange unit of an absorption heat pump, which can reduce the temperature of return water in each heat station of the heat network in turn, but when the water supply temperature of the primary network is low (100 ° C ~ 110 ° C), it can only The temperature of the return water in the primary network is reduced to above 30°C. Due to the insufficient cooling capacity of the return water in the primary network, the heat recovered from the condenser at the heat source is limited. ZL2011102465935 proposes another compound heat exchange unit, which adds an extern...

AI Technical Summary

Problems solved by technology

Although the compound heat exchange unit can further reduce the return water temperature of the primary network, it 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, an increase in cost, and an increase in the resistance of the primary network

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