1000MW超超临界直接空冷机组初始温差值的优化设计  

Design Optimization on Initial Temperature Difference of a 1 000 MW Ultra-supercritical Direct Air-cooled Unit

作　　者：韩中合[1] 马务[1] 王智[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,保定071003

出　　处：《动力工程学报》2013年第1期66-70,共5页Journal of Chinese Society of Power Engineering

摘　　要：以空冷系统年总费用为目标函数,对某1 000MW超超临界直接空冷机组进行了变工况计算,比较了不同初始温差值tI和迎面风速下机组的年总费用,分析了机组最佳tI随煤价、凝汽器管束价格和环境温度的变化情况.结果表明:机组的tI取32K,迎面风速为2.2m/s时,机组的年总费用最低;煤价对年总费用的影响最明显,当煤价较高时,可以采取较低的tI,以提高机组热效率,降低煤耗.Taking the total annual cost of an air-cooled system as the target function, variable condition cal- culation was conducted to a 1000 MW ultra-supercritical direct air-cooled unit to compare its total annual costs at different ti values and face velocities, and analyze the change of optimal tl value of the unit with prices of coal and condenser tube bundle and the ambient temperature. Results show that when the ti value is 32 K and the face velocity is 2.2 m/s, the total annual cost of the unit is the lowest. Coal price has the most significanl influence on the total annual cost. When the coal price is relatively high, it is suggested that a low t1 value be adopted so as to improve thermal efficiency and reduce coal consumption of the unit.

关 键 词：直接空冷系统 初始温差 年总费用 优化 

分 类 号：TK247[动力工程及工程热物理—动力机械及工程]