应用吸收式热泵提高热电厂经济效能研究

为了提高热电厂供热经济效能,以热泵原理的研究为基础,利用Thermoflow专业软件模拟一台亚临界600MW一次中间再热供热机组,直接以汽轮机0.4MPa,250℃抽汽作为热源向城市热网供热,供热量为440GJ/h。在此基础上对选用吸收式热泵技术回收低温余热供热的新系统进行模拟,以汽轮机0.4MPa,250℃抽汽作为吸收式热泵的驱动蒸汽,提高循环冷却水的品位供热。在供热量不变的情况下,模拟结果证实热电厂采用吸收式热泵的供热方法和传统直接以汽轮机抽汽为热源的供热方法相比,可以帮助电厂每年节省767966～1053453GJ的热量,节省标准煤26204～35945吨,同时减少排放温室气体CO269702～95613吨。说明吸收式热泵对于余热的回收可以产生巨大的经济效益和环境效益。

Study of the Application of an Absorption Heat Pump to Improve the Thermal Power Plant Economic Performance

In order to improve the economic efficiency of thermal power plant, according to the principle of heat pump, using Thermoflow professional software to simulate a subcritical 600MW once reheat heating unit, tur- bine 0.4MPa, 250℃ heating steam extraction as a heat source to the urban heating network, heat supply for 440GJ / h. On this basis to stimulate analog absorption heat pump heating system by using 0.4MPa, 250 ℃ steam ex- traction as absorption heat pump driven steam to improve the taste of the circulating cooling water. In the case of constant heat supply, the simulation results confirmed the thermal power plant using absorption heat pump heating method, compared to traditional methods of heating, which can help power plants each year to save 767966 .- 1053453GJ heat, 26204 - 35945 tons of standard coal and reduce 69702 - 95613 tons of greenhouse gas emissions.