加热器端差对1000MW机组热经济性影响的数学模型研究  

Calculation Mode on the Influence of Terminal Temperature Difference on Heat Economy of 1 000MW Unit

作　　者：周振起[1] 李晓东[1] 王涛[1] 李昕东[2] 

机构地区：[1]东北电力大学能源与动力工程学院,吉林132012 [2]山西电力职业技术学院,太原030001

出　　处：《汽轮机技术》2013年第2期89-92,共4页Turbine Technology

摘　　要：在凝汽系数法基本理论的基础上定义了凝汽系数变动率的概念。采用凝汽系数法,从反平衡的角度出发,针对不同型式的加热器,通过严密的数学推导,得出了加热器端差对经济性影响的凝汽系数模型。以超超临界参数1 000MW机组为研究对象,运用所建立的凝汽系数模型定量分析了表面式加热器端差对该机组热经济性的影响,并将凝汽系数法模型与等效热降法模型的计算结果进行了对比,结果表明,凝汽系数法具有模型简捷、结果准确的特点。Basing on the exhaust coefficient calculation method which is anti - balance method, a important conception, which is called as rate of change in exhaust coefficient, is defined in the paper. Exhaust coefficient calculation mode for different heater types on terminal temperature difference of heater is defined and recommended by strict deduction and demonstration. Taking introduced 1000MW unit for example, the paper analyzes the influence of terminal temperature difference on heat economy of unit by exhaust coefficient calculation mode and the results of exhaust coefficient calculation mode is compared with the results of positive balance method; The result shows that the exhaust coefficient calculation method is rapid, convenient and accurate.

关 键 词：加热器 端差 1000MW机组 凝汽系数法 定量计算 热经济性 

分 类 号：TK284.1[动力工程及工程热物理—动力机械及工程]