耦合跨临界有机朗肯循环和蒸气压缩制冷循环系统经济性分析  

Economic Analysis of a Combined Transcritical Organic Rankine Cycle with Vapor Compression Refrigeration Cycle System

作　　者：李晓平[1] 王晓琼[1] 杜美瑭 李友荣[1] 

机构地区：[1]重庆大学动力工程学院低品位能源利用技术及系统教育部重点实验室,重庆400044

出　　处：《工业加热》2014年第4期12-16,29,共6页Industrial Heating

基　　金：国家重点基础研究发展计划资助(2011CB710701)

摘　　要：提出了一种由烟气余热驱动的耦合跨临界有机朗肯循环(TORC)和蒸气压缩制冷循环(VCR)的冷电联产复合系统(PRCS),并以年净利润为评价指标、分别以R22、R134a和R290为循环工质对该复合系统进行了经济性分析。结果表明:在一定热源条件下,随着膨胀机进口压力的提高,年净利润先增大、后减小。当烟气温度较低、冷量需求不大时,采用R134a工质的系统年净利润最大;当烟气温度较高、冷量需求较大时,则R22更具优势。提高烟气进口温度和冷媒水出口温度、降低工质冷凝温度都可以有效提高系统经济性。In this paper, a novel power/refrigeration combined-system driven by the low-grade waste heat of the flue gas was proposed, which coupled a transcritieal organic Rankine cycle with a vapor compression refrigeration cycle. And a detailed economic analysis on this system with R22, R134a and R290 was performed by using annual net profit as evaluation criterion. Results show that the annual net profit increases first, and then decreases with the increase of the turbine inlet pressure. When both inlet temperature of the flue gas and the refrigeration capacity are low, R134a is recommended as the working fluid of the combined-system. Contrarily, R22 is more appropriate. The economic performance can be improved by increasing the inlet temperature of the flue gas and outlet temperature of refrigerant water, and decreasing the condensing temperature of the working fluid.

关 键 词：有机朗肯循环 复合系统 烟气余热 经济性分析 

分 类 号：TK115[动力工程及工程热物理—热能工程]