多背压凝汽器的变传热系数熵产分析  

ENTROPY GENERATION ANALYSIS OF A MULTI-BACKPRESSURE CONDENSER AT VARIATION OF HEAT TRANSFER

作　　者：徐志明[1] 甘云华[1] 杨善让[1] 

机构地区：[1]东北电力学院,吉林吉林132012

出　　处：《热力发电》2003年第3期15-18,共4页Thermal Power Generation

摘　　要：考虑传热系数随凝汽器结构和冷却水入口温度而变化的事实 ,经理论分析及推导 ,给出了多背压凝汽器熵产生数的计算式 ,并分析了凝汽器各级传热面积和循环倍率对熵产生数的影响。以多背压凝汽器的熵产生数为目标函数 ,得出了多背压凝汽器的最优结构。Considering the fact that the heat transfer coefficient is variating along with condenser's structure and the temperature of inlet cooling water, a calculating formula of entropy generation number for multi-backpressure condensers is given through theoritical analysis and deduction, and the influence of heat transfer surface and circulation ratio in every stage of the condenser upon the entropy generation number has been analysed. Taking the entropy generation number of a multi-backpressure condenser as the target function, the optimum structure of a multi-backpressure condenser has been obtained.

关 键 词：多背压凝汽器 熵产生数 循环倍率 变传热系数 熵产分析 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]