Advanced exergy analysis of vapor compression systems using low-GWP refrigerants and variable-frequency compressor
This study investigates the performance of a vapor compression refrigeration system equipped with three different expansion devices (capillary tube, thermostatic valve and an electronic valve) along with a variable-frequency compressor. The primary objective is to optimize system efficiency and iden...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | International Journal of Thermofluids |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202725003209 |
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| author | Rahul Deharkar Parth Prajapati Bansi D. Raja Vivek K. Patel |
| author_facet | Rahul Deharkar Parth Prajapati Bansi D. Raja Vivek K. Patel |
| author_sort | Rahul Deharkar |
| collection | DOAJ |
| description | This study investigates the performance of a vapor compression refrigeration system equipped with three different expansion devices (capillary tube, thermostatic valve and an electronic valve) along with a variable-frequency compressor. The primary objective is to optimize system efficiency and identify a viable alternative to the high-global warming potential (GWP) refrigerant R134a. Conventional exergy analysis reveals that the electronic expansion valve minimizes exergy destruction across all alternative refrigerants compared to both a capillary tube and a thermostatic valve. Further insights are gained through advanced analysis, indicating that the R1234yf system exhibits 3.53 % lower exergy destruction than the R134a system. Notably, the evaporator emerges as the most sensitive component across all refrigerants, contributing the highest average exergy loss (0.88 kW) which can be substantially reduced to 0.67 kW (23.57 %) through pressure ratio optimization. These findings strongly suggest that the low-GWP refrigerant R1234yf presents the most promising alternative to R134a, offering both improved efficiency and reduced environmental impact. |
| format | Article |
| id | doaj-art-927eb5d0803b4bc3b2fd2b9f0a396526 |
| institution | Kabale University |
| issn | 2666-2027 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Thermofluids |
| spelling | doaj-art-927eb5d0803b4bc3b2fd2b9f0a3965262025-08-24T05:14:39ZengElsevierInternational Journal of Thermofluids2666-20272025-09-012910137410.1016/j.ijft.2025.101374Advanced exergy analysis of vapor compression systems using low-GWP refrigerants and variable-frequency compressorRahul Deharkar0Parth Prajapati1Bansi D. Raja2Vivek K. Patel3Department of Mechanical Engineering, Pandit Deendayal Energy University, Gandhinagar, Gujarat, IndiaDepartment of Mechanical Engineering, Pandit Deendayal Energy University, Gandhinagar, Gujarat, IndiaDepartment of Mechanical Engineering, Indus University, Ahmedabad, Gujarat, IndiaDepartment of Mechanical Engineering, Pandit Deendayal Energy University, Gandhinagar, Gujarat, India; Corresponding author.This study investigates the performance of a vapor compression refrigeration system equipped with three different expansion devices (capillary tube, thermostatic valve and an electronic valve) along with a variable-frequency compressor. The primary objective is to optimize system efficiency and identify a viable alternative to the high-global warming potential (GWP) refrigerant R134a. Conventional exergy analysis reveals that the electronic expansion valve minimizes exergy destruction across all alternative refrigerants compared to both a capillary tube and a thermostatic valve. Further insights are gained through advanced analysis, indicating that the R1234yf system exhibits 3.53 % lower exergy destruction than the R134a system. Notably, the evaporator emerges as the most sensitive component across all refrigerants, contributing the highest average exergy loss (0.88 kW) which can be substantially reduced to 0.67 kW (23.57 %) through pressure ratio optimization. These findings strongly suggest that the low-GWP refrigerant R1234yf presents the most promising alternative to R134a, offering both improved efficiency and reduced environmental impact.http://www.sciencedirect.com/science/article/pii/S2666202725003209Vapor compression refrigeration systemExergy distractionAdvanced exergy analysisOptimization |
| spellingShingle | Rahul Deharkar Parth Prajapati Bansi D. Raja Vivek K. Patel Advanced exergy analysis of vapor compression systems using low-GWP refrigerants and variable-frequency compressor International Journal of Thermofluids Vapor compression refrigeration system Exergy distraction Advanced exergy analysis Optimization |
| title | Advanced exergy analysis of vapor compression systems using low-GWP refrigerants and variable-frequency compressor |
| title_full | Advanced exergy analysis of vapor compression systems using low-GWP refrigerants and variable-frequency compressor |
| title_fullStr | Advanced exergy analysis of vapor compression systems using low-GWP refrigerants and variable-frequency compressor |
| title_full_unstemmed | Advanced exergy analysis of vapor compression systems using low-GWP refrigerants and variable-frequency compressor |
| title_short | Advanced exergy analysis of vapor compression systems using low-GWP refrigerants and variable-frequency compressor |
| title_sort | advanced exergy analysis of vapor compression systems using low gwp refrigerants and variable frequency compressor |
| topic | Vapor compression refrigeration system Exergy distraction Advanced exergy analysis Optimization |
| url | http://www.sciencedirect.com/science/article/pii/S2666202725003209 |
| work_keys_str_mv | AT rahuldeharkar advancedexergyanalysisofvaporcompressionsystemsusinglowgwprefrigerantsandvariablefrequencycompressor AT parthprajapati advancedexergyanalysisofvaporcompressionsystemsusinglowgwprefrigerantsandvariablefrequencycompressor AT bansidraja advancedexergyanalysisofvaporcompressionsystemsusinglowgwprefrigerantsandvariablefrequencycompressor AT vivekkpatel advancedexergyanalysisofvaporcompressionsystemsusinglowgwprefrigerantsandvariablefrequencycompressor |