变热源有机朗肯循环系统的综合性能分析  

Comprehensive Performance Analysis of Organic Rankine Cycle System with Variable Heat Source

作　　者：李慧君[1] 蒋长辉 范伟[1] 王庆五[1] LI Huijun;JIANG Changhui;FAN Wei;WANG Qingwu(School of Energy,Power and Mechanical Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China)

机构地区：[1]华北电力大学能源动力与机械工程学院

出　　处：《动力工程学报》2022年第3期286-292,共7页Journal of Chinese Society of Power Engineering

基　　金：保定市科技支撑计划资助项目(2011ZG020)。

摘　　要：针对120~150℃的变温热源,以(火用)效率和净现值为目标函数建立了有机朗肯循环(ORC)系统的多目标优化模型。通过帕累托解集确定权重系数,同时建立综合目标函数F_(x);在给定条件下,分析了蒸发温度和热源参数对系统综合性能的影响。结果表明:R1234ze的综合性能优于R245fa和R134a;α法和帕累托解集确定的权重系数有差异,但各工质的优化指标对应的系统运行参数相似,误差不大;蒸发温度在361 K左右时,R1234ze和R134a对应的系统F_(x)值大小关系发生转变。For variable temperature heat source of 120~150℃,exergy efficiency and net present value(NPV)were used as objective functions to establish a multi-objective optimization model of ORC system.The weight coefficients were determined by the Pareto boundary solution,and the comprehensive objective function F_(x) was established.The influence of the evaporation temperature and heat source parameters on the comprehensive performance of the system was analyzed in the given conditions.Results show that the overall performance of R1234 ze is better than that of R245 fa and R134 a.The weight coefficients determined by theαmethod and the Pareto boundary solution are different,but the system operating parameters corresponding to the optimization indicators of each working fluid are similar,and the error is not large.When the evaporation temperature is around 361 K,the relationship between the system F_(x) values corresponding to R1234 ze and R134 a changes.

关 键 词：有机朗肯循环 综合目标函数 综合性能 帕累托边界 多目标 

分 类 号：TK115[动力工程及工程热物理—热能工程]