Relay energy station type large-temperature-difference heat supply system and method

Abstract

The invention discloses a relay energy station type large-temperature-difference heat supply system and method. The relay energy station type large-temperature-difference heat supply system comprises a heat network water supply pipeline supplying heat to a user at a relay energy station, and a heat network water returning pipeline returning from the user. A large-temperature-difference heat supply device is connected between the water supply pipeline and the water returning pipeline. The relay energy station type large-temperature-difference heat supply system and method have the beneficial effects that heat network return water enters an evaporator and an absorber of a unit in a parallel manner to serve as a low-temperature heat source and a medium-temperature heat source of the heat supply unit, part of heat network return water emits heat in the evaporator, the temperature is reduced, then the heat network return water returns to a heat source station, and the supply water and return water temperature difference is increased; and the rest of heat network return water flows through the absorber and a condenser in series, and the heat of the low-temperature heat source and the heat of a drive heat source are sufficiently recycled to serve as a heat supply heat source to be combined into the heat network supply water to enter a heat user.

Description

technical field [0001] The invention belongs to the field of heat supply energy, in particular to a relay energy station type large temperature difference heat supply system and method. Background technique [0002] With the continuous development of the city scale, the urban central heating area continues to increase, exceeding the design flow achieved by the existing pipe network, resulting in a large transmission bottleneck. It is necessary to expand and transform the overall pipe network. However, the investment in the expansion and transformation of the overall pipe network is huge, the transformation is difficult, and the cycle is long. Faced with this problem, you can choose to add conventional heat station-type large temperature difference heat exchange units in each heat station. , which can greatly reduce the return water of the heating heating network, increase the temperature of the supply and return water, and realize a substantial increase in the heating capaci...

AI Technical Summary

Problems solved by technology

It is necessary to expand and transform the overall pipe network. However, the investment in the expansion and transformation of the overall pipe network is huge, the transformation is difficult, and the cycle is long. Faced with this problem, you can choose to add conventional heat station-type large temperature difference heat exchange units in each heat station. , which can greatly reduce the return water of the heating heating network, increase the temperature of the supply and return water, and realize a substantial increase in the heating capacity of the heating network without changing the existing pipe network. However, since most thermal stations have been built for a long time, the design is compact There is no remaining space to replace the large temperature difference units of conventional thermal power stations, and the replacement of a small number of thermal power stations cannot significantly reduce the return water temperature of the heating pipe network

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