Performance analysis of double-effect absorption refrigeration systems using hydrofluoroolefin refrigerants and ionic liquid absorbents

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-04-15 DOI:10.1016/j.csite.2025.106141

Yonggyun Lee , Chanho Chu , Taeyoung Beom , Sangwon Kim , Jungtae Kim , Dong Kyu Kim

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引用次数: 0

Abstract

This study investigated the feasibility of double-effect absorption refrigeration systems (DEARS) using hydrofluoroolefin (HFO) refrigerants and ionic liquid (IL) absorbents as working fluid pairs. Enthalpy and vapor-liquid equilibrium (VLE) correlation equations were developed to facilitate thermodynamic modeling and system analysis. Among the examined pairs, R1234ze(Z) + [BMIM][SCN] and R1336mzz(Z) + [OMIM][BF4] were identified as promising candidates due to their significant concentration differences between weak and strong solutions (0.0998 and 0.0565, respectively). Performance evaluations demonstrated high coefficients of performance (COP), reaching 1.24 for R1234ze(Z) + [BMIM][SCN] and 1.46 for R1336mzz(Z) + [OMIM][BF4]. Further analysis of COP variations under different operating conditions reveals that both working fluid pairs exhibit performance improvements with increasing generator temperatures. The absorber temperatures significantly influenced system efficiency, where lower temperatures enhanced refrigerant separation and improved COP. Similarly, increasing the evaporator temperature improved COP by raising the saturation pressure, which enhanced refrigerant separation in the generator and overall system performance. These findings expanded the selection of environmentally friendly refrigerants for DEARS by incorporating ILs, contributing to the sustainable development of absorption refrigeration systems.

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.