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根据南方供暖现状,提出将吸收式热泵纳入抽凝机组冷端,利用废热实现区域供暖的设计方案。通过对某300MW抽凝式机组分别进行纯凝与供热模式的变工况计算,将本方案与南方地区现有的电空调供热、纯凝机组发电方式进行比较,得出不同热负荷下的供热与发电节煤量,求得总节煤量。同时提出节煤率的概念,作为评价本方案节能性的指标,并得出节煤率随热负荷变化关系。最后,从电厂收益和投资回收期分析了纳入热泵后的电厂经济性,并将热泵供热方式与空调供热方式的居民花费做了比较,得出采用本设计方案对电厂与居民均具有良好经济效益的结论。
According to the status quo of heating in the south, the paper put forward that the absorption heat pump should be incorporated into the cold side of the condensing unit, and the design of district heating should be realized by using waste heat. By comparing the condensing and heating modes of a 300MW condensing condensing unit with the changing conditions, this scheme is compared with the existing power generation mode of heating and condensing units in the electric air-conditioners in the south of China. The results show that under different thermal loads The amount of heat and power generation coal, get the total amount of coal. At the same time, the concept of coal saving rate is put forward as an index to evaluate the energy saving of the scheme and the relationship between coal saving rate and heat load is obtained. Finally, the economic efficiency of the power plant after heat pump is analyzed based on the benefit of the plant and the payback period. The comparison between the heat pump heating method and the residential heating method is made. The results show that the power plant and the residents are good Conclusion of economic benefits.