采用[bmim]Zn_(2)Cl_(5)/NH_(3)和NaSCN/NH3为工质的两级复叠吸收式制冷稳态特性  

Energy and Exergy Analysis of a Novel Two-stage Cascade Absorption Refrigeration Using[bmim]Zn_(2)Cl_(5)/NH_(3) and NaSCN/NH_(3) as Working Fluids at Low Evaporating Temperature

作　　者：白杨[1] 李邹路 陈伟[1] 张斌[1] 马连湘[1] BAI Yang;LI Zoulu;CHEN Wei;ZHANG Bin;MA Lianxiang(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061

出　　处：《青岛科技大学学报（自然科学版）》2021年第3期85-93,共9页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金项目(51506104)。

摘　　要：提出了一种以[bmim]Zn_(2)Cl_(5)/NH_(3)和NaSCN/NH3为工质的新型两级复叠吸收式制冷(TCAR)。基于系统部件的质量守恒,能量守恒和[火用]方程,对TCAR系统的热性能进行了数值研究。计算并分析了热源温度和冷媒水入口温度关键性能参数的影响。结果显示:TCAR系统的热性能优于两级吸收式制冷(TAR)系统,性能系数(COP)略低于热驱动压缩吸收式制冷(HACR)系统,但TCAR系统的热源温度低于HACR系统,且TCAR系统的结构比HACR系统简单得多。计算并比较了每个部件的[火用]损,发现发生器、冷凝器以及吸收冷凝器的[火用]损最大。A novel two-stage cascade absorption refrigeration(TCAR)using[bmim]Zn_(2)Cl_(5)/NH_(3) and NaSCN/NH_(3) as working fluids was proposed,which can be driven only by heat sources,such as waste heat from industry buildings and solar energy.The thermal performance of the proposed TCAR system was numerically investigated by considering the mass conservation,energy conservation,and exergy equation of each component.The effects of the inlet temperatures of heat source,cooling water,and chilled water on seven important operating temperatures were calculated and analyzed.The variations of six performance parameters were simulated and discussed.The thermal performance of the TCAR system is better than that of the two-stage absorption refrigeration(TAR)system.The COP of TCAR is a little lower than that of the heat-driven compression-absorption refrigeration(HACR)system.However,the heat source temperature of TCAR system is lower than that of HACR system,and the structure of TCAR system is considerably simpler than that of HACR system.The exergy losses of each component were calculated and compared.The three largest exergy losses occurred in generator,condenser,and the cascade component of absorber and generator.

关 键 词：两级复叠吸收式制冷(TCAR) NaSCN/NH_(3) [bmim]Zn_(2)Cl_(5)/NH_(3) 性能系数(COP) [火用]分析 

分 类 号：TK101[动力工程及工程热物理—热能工程]