基于热力学第二定律的余热资源定量分析方法  

Quantitative Analysis of Waste Heat Resources Based on the Second Law of Thermodynamics

作　　者：周少祥[1] 邹文波[1] 胡三高[1] 梁双印[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《动力工程学报》2013年第10期803-807,共5页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(51376059)

摘　　要：应用热力学基本原理分析了余热回收的热量和热量的定量计算问题.基于能源利用的单耗分析理论,推导出基于第二定律的余热利用节煤量的定量计算公式,并对比分析了燃气轮机、水泥窑炉和电厂锅炉烟气余热回收及余热发电的节能特性.结果表明:余热回收的节能量不仅取决于余热的绝对量,还取决于其温度水平,温度水平越低,节能量越小.An analysis was performed to the quantitative calculation method for waste heat recovery and its exergy according to thermodynamic fundamentals. Based on the fuel specific consumption analysis of energy utilization, formulae were derived for quantitative calculation of coal saved by waste heat recovery using the second law of thermodynamics, while a comparative analysis of energy-saving potential through waste heat recovery and power generation made among gas turbine, cement plant and coal-fired power plant. Results show that the amount of energy economized by waste heat recovery depends on not only the absolute quantity of waste heat, but also the temperature level, i.e. the lower the temperature level, the less the coal saved.

关 键 词：余热资源 节煤量 单耗分析 熵产 

分 类 号：TK115[动力工程及工程热物理—热能工程]