Thermodynamic analysis of a novel exhaust heat-driven non-adiabatic ejection-absorption refrigeration cycle using R290/oil mixture

• Published in: Energy conversion and management Vol. 149; pp. 244 - 253
• Main Authors: Li, Keqiao, Cai, Dehua, Liu, Yue, Jiang, Jingkai, Sun, Wei, He, Guogeng
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.10.2017; Elsevier Science Ltd
• Subjects: Absorbers; Absorption; Adiabatic; Adiabatic flow; Ejection; Ejection-absorption refrigeration; Enthalpy; Exhaust heat; Heat; Miniaturization; Non-adiabatic absorber; Oil; Pressure ratio; R290/oil; Refrigeration; Studies; Temperature effects; Thermodynamics; Exhaust heat; R290/oil; Ejection-absorption refrigeration; Non-adiabatic absorber
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/j.enconman.2017.07.021

A novel air-cooled non-adiabatic ejection-absorption refrigeration cycle using R290/refrigeration oil has been thermodynamically analyzed. Influences of the ejector and the non-adiabatic absorber applications on the system performance and other system operation parameters have been investigated. The simulation results will be of great help to the miniaturization and practical application of the air-cooled absorption refrigeration system. [Display omitted] •A novel air-cooled non-adiabatic ejection-absorption refrigeration cycle is proposed.•Influences of the ejector and the air-cooled non-adiabatic absorber applications on the system performance are investigated.•Variations of system performance and other system operation parameters are investigated.•R290/refrigeration oil mixture used as working pairs is analyzed. This paper thermodynamically analyzes a novel air-cooled non-adiabatic ejection-absorption refrigeration cycle with R290/oil mixture driven by exhaust heat. An ejector located at the upstream of the non-adiabatic absorber is employed to improve the cycle performance. Variations of COP, circulation ratio and component heat load of the system as a function of generating temperature, pressure ratio, absorption temperature, condensing temperature and evaporating temperature have been investigated in this work. The simulation results show that, compared with the conventional absorption refrigeration cycle, this non-adiabatic ejection-absorption refrigeration cycle has higher absorption efficiency, better performance, wider working condition range and lower total heat load and its COP can reach as high as 0.5297. The implementation of the ejector and the non-adiabatic absorber helps to realize the miniaturization and wider application of the absorption refrigeration system. In addition, R290/oil mixture is a kind of highly potential working pairs for absorption refrigeration.