加热器上端差变化对机组煤耗影响的改进计算模型  

Improved Calculation Model of Influence of Heater Terminal Temperature Difference on Unit Coal Consumption

作　　者：闫顺林[1] 吴换英[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》2010年第2期56-59,78,共5页Electric Power Science and Engineering

摘　　要：定量分析加热器上端差对机组热经济性的影响是节能改造的一项重要工作,但以往建立的加热器上端差的耗差分析模型,只是推导到由端差变化而引起的加热器出口水焓变化。直接推导到加热器端差的变化,形式更鲜明,计算更方便。通过实例计算,验证了所建模型的正确性,为火电机组节能降耗的分析工作提供了一种工具,具有重要的实际意义。It is an important energy-saving work to analyze the influence of terminal temperature difference on thermal economy of unit. But in the past, consumption analysis model is derived by changes of water enthalpy of the export ofheater, and the model in this paper was derived directly by changes ofterminaltemperature difference.It was more clear-cut and convenient for computing. The models discussed in the paper were proved to be correct by the checking calculations. It provided a new tool with great practical importance for energy saving analysis of units.

关 键 词：加热器 端差 机组热经济性 煤耗 

分 类 号：TK284.1[动力工程及工程热物理—动力机械及工程]