加热器端差对机组煤耗影响的简易计算  

SIMPLE AND EASY CALCULATION FOR INFLUENCE OF HEATER'S TERMINAL TEMPERATURE DIFFERENCE UPON COAL CONSUMPTION OF 1000 MW UNIT

作　　者：王富兴[1] 田松峰[2] 麻东东[2] 房林铁[2] 

机构地区：[1]中石化天津分公司动力部,天津300000 [2]华北电力大学电站设备状态监测与控制教育部重点实验室,河北保定071003

出　　处：《热力发电》2011年第12期13-16,共4页Thermal Power Generation

摘　　要：以小扰动理论为基础,根据热力系统热经济性的基本方程,推导出定流量条件下加热器端差对机组煤耗影响的简易计算模型,并以1 000MW机组为例进行算例分析。结果表明,该模型能准确而快速地评价各级加热器端差变化对机组煤耗的影响,具有通用性。经与等效焓降法比较,计算结果基本一致。Taking the theory of small disturbance as the basis,and based on the basic equation of thermal economic efficiency in the thermodynamic system, a commonly used simple and easy calculation model has been deducted for the influence of heater＇s terminal temperature difference upon the coal consumption of unit under comstant flow rate condition. Taking a 1000 MW unit as example,the calculated result has been analysed, it shows that the said model can accurately and rapidly evaluate the influence of terminal temperature difference variation concerning the heater in each stage upon the coal consumption of said unit. The above- mentioned model boasts universality,compared with the equivalent enthalpy drop method,the calculated results are basically identical.

关 键 词：1 000 MW机组 加热器端差 热力系统 煤耗率 热经济性 

分 类 号：TK212[动力工程及工程热物理—动力机械及工程]