结合ORC和ARC的中温余热回收系统  

A Medium Temperature Waste Heat Recovery System Combined With ORC and ARC

作　　者：雷欢[1,2] 杨金福[1] 唐长亮[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100049 [2]中国科学院大学,北京100190

出　　处：《工程热物理学报》2015年第10期2102-2106,共5页Journal of Engineering Thermophysics

基　　金：国家科技支撑项目(No.2012BAA11B00)

摘　　要：中温余热回收过程中传热温差大,系统(火用)效率较低,本文提出一种结合有机朗肯循环和单效吸收式制冷系统的中温烟气余热回收系统。利用热力学第一定律和第二定律对系统建立了数学模型,分析了新系统中有机朗肯循环蒸发温度、冷凝温度等参数对系统性能的影响。同时对系统各主要部件进行了(火用)分析,并与双效溴化锂吸收式制冷系统进行了比较,通过T-Q图分析了新系统及参考系统的换热过程。结果表明新系统的(火用)损失从139.19 kW降低到93.18 kW,(火用)损失减少机理在于换热温差降低。Large temperature difference exists in medium temperature waste heat recovery processes and system exergy efficiency is low.A medium temperature flue gas waste heat recovery system combined with organic Rankine cycle and single effect absorption refrigeration cycle is proposed.A mathematical model was built based on the first and second law of thermodynamics.The impacts of organic Rankine cycle evaporating temperature,condensing temperature and other parameters on system performance were analyzed.Exergy analysis of major system components were conducted and were compared with double effect lithium bromide absorption refrigeration system.The heat transfer processes in new system and reference system were both analyzed through T-Q diagram method.The result shows that：total system exergy losses were reduced from 139.19 kW to 93.18 kW;the mechanism of exergy losses reduction is the heat transfer temperature difference decrease.

关 键 词：有机朗肯循环 吸收式制冷循环 中温余热回收 (火用)损失 

分 类 号：TK123[动力工程及工程热物理—工程热物理]