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热泵已成为分散供热及小范围集中供热的主要形式之一.为此,本文以某330MW热电联产机组为例,研究热电联产机组相比热泵供热、锅炉供热的节能效应.通过改变热泵COP值、机组电负荷率及热电比,获得不同工况下热电联产系统的节煤率.结果表明,对于某一特定工况,热电联产的节煤率随热泵COP值的增大而减小,随机组电负荷率的增大而增大,随热电比的增大而增大;在电负荷率较大、热电比较高、热泵COP较低时,热电联产机组才具备节能效果.“,”Heat pump heating has become one of the main forms of decentralized and small central heating.Therefore,this paper studies the energy-saving effect of 300 MW heat and power cogeneration unit compared with heat pump and boiler heating.Coal saving rate of cogeneration system is obtained under different conditions through the variable COP,electrical load rate and heat-to-electric ratio.It was found that the cogeneration unit coal saving rate decreases with the increase of value of COP,and increases with electrical load rate and heat-to-electric ratio,in some working conditions.In the condition of bigger electrical load rate,higher heat-to-electric ration and lower value of COP,cogeneration units have energy saving effect.