660MW机组冷热电联产可行性分析

Feasibility Analysis of Refrigerant-Heat and Electricity Cogeneration for 660MW Unit

热电联产机组夏季热负荷较低,一定程度上影响了其经济运行和安全运行。针对这一现象,提出了利用溴化锂吸收式制冷机增加热电厂夏季热负荷这一设想。以某供热系统经过改造的超临界机组为研究对象,采用等效焓降法分析了冷热电联产方式的经济性。结果表明,该设想在技术上是可行的,在电动式制冷设备的制冷系数小于7.0时,冷热电联产经济效益显著。

It is of great significance to improve the economy and safety for heat-electricity cogeneration unit in summer owing to low thermal load. To this problem, the idea of increasing the thermal load of thermal power plant was proposed. For a supercritical unit with retrofitting its heating system, the economy under refrigerant-heat and electricity cogeneration was investigated based on the enthalpy drop method. The results show that the idea is feasibility on technology and the economic benefit of refrigerant-heat and electricity cogeneration is remarkable if the refrigeration coefficient of electric motor driven refrigeration machine is less than 7.0.