多压凝汽器对机组热经济性影响的计算模型  

Computational Model of the Influence on Multi-pressure Condenser on Unit Thermal Efficiency

作　　者：闫顺林[1] 张俍[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《电力科学与工程》2013年第4期70-73,78,共5页Electric Power Science and Engineering

摘　　要：根据热力系统热平衡方程、比内功方程及发电标准煤耗率计算公式,导出了多压凝汽器对机组热经济性影响的计算模型;改进了多压凝汽器机组循环做功量的计算方法,使计算结果更为准确。计算实例表明,多压凝汽器有利于降低机组的标准煤耗率;三背压机组效率比双背压机组效率高;对凝汽更为合理的分配有利于降低机组煤耗。According to the heat balance equation, turbine power equation and generation standard coal consump-tion rate formula derives multi-pressure condenser unit thermal economic impact general-purpose computing model. Improves method of calculation of the multi-pressure condenser unit circulating amount of work done in the past, so the results are more accurate. Calculation examples show that the muhi-pressure condenser beneficial to reduce the unit standard coal consumption rate. Three backpressure unit efficiency is higher than the double back-pressure u-nit efficiency. Reduction of unit coal consumption is available to a more reasonable distribution of condensing steam.

关 键 词：多压凝汽器 热力系统 机组煤耗 热经济性 

分 类 号：TK262[动力工程及工程热物理—动力机械及工程]