结合ORC和VCR的中温余热回收系统性能分析  

Performance of a Medium-Temperature Waste Heat Refrigeration System with Combined ORC and VCR

作　　者：雷欢[1] 杨金福[1] 唐长亮[1] 韩东江[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100190

出　　处：《热能动力工程》2017年第1期7-12,共6页Journal of Engineering for Thermal Energy and Power

摘　　要：为了利用丰富的中低温余热进行制冷,本文提出了一种结合ORC(有机朗肯循环)和VCR(蒸汽压缩制冷循环)的制冷系统,并对新系统进行了热力学分析和火用损失分析。此外,对比分析了Cyclohexane、D4、n-octane及R141b四种工质的热力学性能与ORC蒸发温度、制冷剂蒸发温度及透平效率等参数对系统制冷性能的影响。结果表明:以Cyclohexane为ORC工质时,系统总制冷COP(性能系数)最高为1.262;ORC蒸发温度对制冷工质与有机工质的质量流量比有显著的影响;制冷剂蒸发温度对系统的制冷COP有显著的影响;制冷剂冷凝温度对系统制冷COP的影响比ORC冷凝温度大;ORC蒸发器、VCR冷凝器以及ORC冷凝器的火用损失占系统总火用损失的57.28%。In order to use medium and low temperature waste heat to produce cooling capacity,a medium temperature waste heat refrigeration systemwith combined organic Rankine cycle( ORC) and vapor compress refrigeration( VCR) was proposed. A mathematic model based on mass and energy conservation was built and thermodynamic analysis and exergy loss analysis on the system were conducted. The thermodynamic properties of four different working fluids:Cyclohexane,D4,n-octane and R141 b were studied. The effects of ORC generation temperature,refrigerant evaporation temperature,condensing temperature on the system refrigerating coefficient of performance( COP) were analyzed. The results showed that system with Cyclohexane as working fluid had the highest refrigerating COP to1. 262. ORC generation temperature,refrigerant evaporation temperature and refrigerant condensing temperature had significant impacts on system cooling performance. ORC generator,refrigerant condenser and ORC condenser were the largest components of exergy loss and the three components accounted for 57. 28% of the total system exergy losses.

关 键 词：有机朗肯循环 蒸汽压缩式制冷 炯 余热回 收 有机工质 

分 类 号：X706[环境科学与工程—环境工程]