1.热电联产的发展及界定1.1热电联产的发展热电联产时火力发电厂将汽轮机中作完一部分功的蒸汽抽出供给用热户,使本应排至凝汽器需要放弃的蒸汽凝结热得以利用而不予废弃,使火力发电厂的全厂热效率可以大大提高,根据不同的供汽参数热效率由30%～40%在最大供热情况下提高到80%～90%。热电联产已是成熟的技术,几十年来在原苏联、北欧等 1. The development and definition of cogeneration 1.1 The development of cogeneration The cogeneration of thermal power plant will steam turbine as part of the work out of the steam supply to the heat so that the condenser should be discharged to give up steam condensation Heat can be used without abandonment, so that thermal power plant thermal efficiency of the plant can be greatly improved, according to the different steam supply parameters of thermal efficiency from 30% to 40% in the case of maximum heating increased to 80% to 90%. Combined heat and power is already a mature technology, for decades in the former Soviet Union, Northern Europe and so on