热电联产机组供热能耗影响因素研究

Study on Factors Affecting Heating Energy Consumption of Cogeneration Unit

为了研究不同因素对热电联产机组真实供热能耗影响的差异,采用参比机组法计算几种不同容量和类型的热电联产机组的供热煤耗率,进而研究了热网循环水泵、给水泵、供热蝶阀对供热煤耗率的影响。研究表明:与采用小汽轮机驱动相比,热网循环水泵采用电机驱动时,机组供热煤耗率将上升,最大值为1.21 kg/GJ;给水泵采用电机驱动时,机组供热煤耗率可能上升或下降,上升值最大为0.77 kg/GJ,下降值最大为0.99 kg/GJ;与采用供热蝶阀相比,不采用蝶阀时,机组供热煤耗率会下降,下降值最大为12.29 kg/GJ。

To research the influence of different factors on the real heating energy consumption of cogen⁃eration units,the reference unit method was used to calculate the heating coal consumption rate of several different capacity and types of cogeneration units,furthermore,the influence of circulating water pump,feed water pump and heating butterfly valve in the heating network on heating coal consumption rate was studied.Results show that when the circulating water pump in the heating network is driven by motor,compared with that driven by small steam turbine,the heating coal consumption rate of the unit will in⁃crease,and the maximum increasing value is 1.21 kg/GJ;when the feed water pump is driven by motor,the heating coal consumption rate of the unit may increase or decrease,the maximum increasing value is 0.77 kg/GJ and the maximum decreasing value is 0.99 kg/GJ;compared with the heating butterfly valve,when the butterfly valve is not used,the heating coal consumption rate of the unit will be reduced,and the maximum decreasing value is 12.29 kg/GJ.