Heat pump heating system based on heating pipe network

Abstract

The invention relates to a heat pump heating system based on a heating pipe network. The heat pump heating system based on the heating pipe network comprises a refrigerant circulation loop, a heatingwater circulation loop and a new residential area water supply circulation loop, wherein hot water in the heating water circulation loop is output by a thermal power plant, flows through an old residential area heating pipe network, and finally flows back to the thermal power plant, and the heating water circulation loop provides heat for the new residential area water supply circulation loop in amanner of direct connection or indirect heat exchanger; and the refrigerant circulation loop is connected with the heating water circulation loop and the new residential area water supply circulationloop in a manner of heat exchange separately, so that heat in the heating water circulation loop is recovered, and the new residential area water supply circulation loop is heated. Compared with theprior art, according to the heat pump heating system based on the heating pipe network, waste heat in the heating pipe network is subjected to secondary recovery, and converted to high-temperature heat energy on the basis of the characteristics of the heat pump system, so that capacity expansion can be realized in the case of not changing the transportation and distribution capacity of the heatingpipe network, and the thermal comfort of a user while using can also be ensured; and moreover, the scheme is not limited by regions and weather.

Description

technical field [0001] The invention relates to the field of heat pump systems, in particular to a heat pump heating system based on a heating pipe network. Background technique [0002] At present, the schematic diagram of the urban heating pipe network commonly used in the northern heating system is as follows: figure 1 As shown, the thermal power plant uses waste heat to produce hot water for heating and transports it to the heat-using community for heating through the heating pipe network. After the heating is completed, the return water needs to be cooled by the cooling tower to below 15°C before entering the thermal power plant for heating. The system mainly has the following contradictions in actual use: on the one hand, the heating equipment in the old residential area is outdated, and the return water temperature is high (around 40-50°C), and the thermal power plant needs to be cooled to a lower temperature before reuse, resulting in a lot of energy waste. The util...

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Problems solved by technology

[0005] The purpose of the present invention is to make full use of the waste heat in the heating pipe network system, solve the problems of saturated transmission and distribution capacity of the current heating pipe network, difficulty in connecting new communities to the network, and low energy utilization rate of the original heating water, and further provide a non-regional And the technical scheme of heating capacity expansion based on the transmission and distribution capacity of the existing heating pipeline network under climate constraints

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