Performance analysis of the ionic liquid [EMIM][DEP] in absorption refrigeration systems
This study investigates the performance of the absorption refrigeration systems using [EMIM][DEP]-based ([EMIM][DEP]/H2O, [EMIM][DEP]/C2H5OH, [EMIM][DEP]/CH3OH) and conventional solutions (LiBr/H₂O, LiCl/H₂O, H2O/NH3) subject to varying operating conditions. The analysis is carried out through numer...
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Elsevier
2025-06-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025014811 |
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| author | Kai-Shing Yang Jia-Wei Zheng Shi-Feng Zhuang Shih-Kuo Wu Chih-Hao Chen Kai-Hsiang Lin |
| author_facet | Kai-Shing Yang Jia-Wei Zheng Shi-Feng Zhuang Shih-Kuo Wu Chih-Hao Chen Kai-Hsiang Lin |
| author_sort | Kai-Shing Yang |
| collection | DOAJ |
| description | This study investigates the performance of the absorption refrigeration systems using [EMIM][DEP]-based ([EMIM][DEP]/H2O, [EMIM][DEP]/C2H5OH, [EMIM][DEP]/CH3OH) and conventional solutions (LiBr/H₂O, LiCl/H₂O, H2O/NH3) subject to varying operating conditions. The analysis is carried out through numerical simulations, employing the thermodynamic model specifically developed to represent the absorption cycle. While conventional absorbent/refrigerant pairs such as LiBr/H₂O and LiCl/H₂O yield the highest coefficients of performance (COP), [EMIM][DEP]-based solutions show considerable promise as potential replacements. In particular, [EMIM][DEP]/H2O and [EMIM][DEP]/C2H5OH solutions showed remarkable performance, revealing COPs within a comparable range. Besides, the [EMIM][DEP]/CH3OH solution demonstrates superior performance at generator temperatures exceeding 100 °C, suggesting its suitability for higher temperature applications. The overall COP of the absorption system using [EMIM][DEP]/CH3OH as the absorbent is found to be 1.4 % to 2.9 % higher compared to that of the systems using [EMIM][DEP]/H2O and [EMIM][DEP]/C2H5OH. As the temperature rises close to 130 °C, the performance of the system with [EMIM][DEP]/CH3OH solution becomes increasingly comparable to that of the LiBr/H2O system, thereby positioning [EMIM][DEP] as a viable and effective alternative to be implemented in the absorption systems. The results indicate that, despite a modest COP performance, [EMIM][DEP]-based pairs offer significant advantages over conventional working fluids (e.g. LiBr/H₂O and LiCl/H₂O), including intrinsic immunity to crystallization and favorable thermal stability across a broad temperature range (∼80 °C to 200 °C). In a whole, this study demonstrates the immense potential of using [EMIM][DEP]-based solutions in the development of an effective and sustainable absorption technology, particularly in scenarios where the system demands high operational temperatures. |
| format | Article |
| id | doaj-art-ede8d57331f94f4988d60b64c2244db2 |
| institution | OA Journals |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-ede8d57331f94f4988d60b64c2244db22025-08-20T01:57:08ZengElsevierResults in Engineering2590-12302025-06-012610541110.1016/j.rineng.2025.105411Performance analysis of the ionic liquid [EMIM][DEP] in absorption refrigeration systemsKai-Shing Yang0Jia-Wei Zheng1Shi-Feng Zhuang2Shih-Kuo Wu3Chih-Hao Chen4Kai-Hsiang Lin5Department Refrigeration and Air Conditioning and Energy Engineering of National Chin-Yi University of Technology, Taiping District, Taichung, 411, TaiwanGraduate Institute of Precision Manufacturing, National Chin-Yi University of Technology, Taiping District, Taichung, 411, TaiwanGreen Energy & Environment Research Laboratories, Industrial Technology Research Institute, Zhudong Township, Hsinchu 310, TaiwanGreen Energy & Environment Research Laboratories, Industrial Technology Research Institute, Zhudong Township, Hsinchu 310, TaiwanGreen Energy & Environment Research Laboratories, Industrial Technology Research Institute, Zhudong Township, Hsinchu 310, TaiwanDepartment of Mechanical Engineering of National Chung-Hsing University, South District 402, Taichung, Taiwan; Corresponding author.This study investigates the performance of the absorption refrigeration systems using [EMIM][DEP]-based ([EMIM][DEP]/H2O, [EMIM][DEP]/C2H5OH, [EMIM][DEP]/CH3OH) and conventional solutions (LiBr/H₂O, LiCl/H₂O, H2O/NH3) subject to varying operating conditions. The analysis is carried out through numerical simulations, employing the thermodynamic model specifically developed to represent the absorption cycle. While conventional absorbent/refrigerant pairs such as LiBr/H₂O and LiCl/H₂O yield the highest coefficients of performance (COP), [EMIM][DEP]-based solutions show considerable promise as potential replacements. In particular, [EMIM][DEP]/H2O and [EMIM][DEP]/C2H5OH solutions showed remarkable performance, revealing COPs within a comparable range. Besides, the [EMIM][DEP]/CH3OH solution demonstrates superior performance at generator temperatures exceeding 100 °C, suggesting its suitability for higher temperature applications. The overall COP of the absorption system using [EMIM][DEP]/CH3OH as the absorbent is found to be 1.4 % to 2.9 % higher compared to that of the systems using [EMIM][DEP]/H2O and [EMIM][DEP]/C2H5OH. As the temperature rises close to 130 °C, the performance of the system with [EMIM][DEP]/CH3OH solution becomes increasingly comparable to that of the LiBr/H2O system, thereby positioning [EMIM][DEP] as a viable and effective alternative to be implemented in the absorption systems. The results indicate that, despite a modest COP performance, [EMIM][DEP]-based pairs offer significant advantages over conventional working fluids (e.g. LiBr/H₂O and LiCl/H₂O), including intrinsic immunity to crystallization and favorable thermal stability across a broad temperature range (∼80 °C to 200 °C). In a whole, this study demonstrates the immense potential of using [EMIM][DEP]-based solutions in the development of an effective and sustainable absorption technology, particularly in scenarios where the system demands high operational temperatures.http://www.sciencedirect.com/science/article/pii/S2590123025014811Absorption refrigeration cycleIonic liquidCOPECOP |
| spellingShingle | Kai-Shing Yang Jia-Wei Zheng Shi-Feng Zhuang Shih-Kuo Wu Chih-Hao Chen Kai-Hsiang Lin Performance analysis of the ionic liquid [EMIM][DEP] in absorption refrigeration systems Results in Engineering Absorption refrigeration cycle Ionic liquid COP ECOP |
| title | Performance analysis of the ionic liquid [EMIM][DEP] in absorption refrigeration systems |
| title_full | Performance analysis of the ionic liquid [EMIM][DEP] in absorption refrigeration systems |
| title_fullStr | Performance analysis of the ionic liquid [EMIM][DEP] in absorption refrigeration systems |
| title_full_unstemmed | Performance analysis of the ionic liquid [EMIM][DEP] in absorption refrigeration systems |
| title_short | Performance analysis of the ionic liquid [EMIM][DEP] in absorption refrigeration systems |
| title_sort | performance analysis of the ionic liquid emim dep in absorption refrigeration systems |
| topic | Absorption refrigeration cycle Ionic liquid COP ECOP |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025014811 |
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