Numerical simulation and exergy analysis of a single-stage GM cryocooler
Improving the efficiency of the GM cryocoolers is of great importance for energy saving and CO2 emission reduction due to the large amount of cryocoolers installed in the emerging fields of semiconductor manufacture and High Temperature Superconductors (HTS) cooling. Previous studies mainly focused...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844023056876 |
| _version_ | 1797771348587577344 |
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| author | Qinyu Zhao Bo Wang Wei Chao Jun Cheng Yanrui Zhang Hua Zhang Zhihua Gan |
| author_facet | Qinyu Zhao Bo Wang Wei Chao Jun Cheng Yanrui Zhang Hua Zhang Zhihua Gan |
| author_sort | Qinyu Zhao |
| collection | DOAJ |
| description | Improving the efficiency of the GM cryocoolers is of great importance for energy saving and CO2 emission reduction due to the large amount of cryocoolers installed in the emerging fields of semiconductor manufacture and High Temperature Superconductors (HTS) cooling. Previous studies mainly focused on the losses analysis and optimization on the part of cold head, but the details of losses distribution in the parts of compressor and rotary valve were seldom carried out. In this paper, a numerical model of a single stage GM cryocooler including compressor, rotary valve and expander is built, and the feasibility of the model is verified by the experimental results. The losses characteristics of the whole cryocooler are studied based on the exergy analysis method with the help of the numerical model. The results indicate that the main losses are occurred in compressor and rotary valve, the value of exergy loss in compressor decrease with the cooling temperature, and accounts for more than 60% at all cooling temperature. The loss in rotary valve accounts for about 20% of the input electric power, and it does not significantly vary at different cooling temperatures. Pressure drop dominates the loss in the compressor and rotary valve. The insufficient heat exchange between the working gas and regenerative material is the main loss in regenerator, and the losses in regenerator increase significantly with the decrease of cooling temperature when the compressor and rotary valve are fixed. This study provides useful guides for the optimization of GM-type cryocoolers. |
| first_indexed | 2024-03-12T21:36:12Z |
| format | Article |
| id | doaj.art-27948d7cb5f94362aa9098320c5c6ec2 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-12T21:36:12Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-27948d7cb5f94362aa9098320c5c6ec22023-07-27T05:59:30ZengElsevierHeliyon2405-84402023-07-0197e18479Numerical simulation and exergy analysis of a single-stage GM cryocoolerQinyu Zhao0Bo Wang1Wei Chao2Jun Cheng3Yanrui Zhang4Hua Zhang5Zhihua Gan6School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, ChinaCryogenic Center, Hangzhou City University, Hangzhou 310015, China; Corresponding author.Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027, China; CSIC Pride (Nanjing) Cryogenic Technology Co., Ltd. Nanjing 211106, ChinaCryogenic Center, Hangzhou City University, Hangzhou 310015, ChinaCryogenic Center, Hangzhou City University, Hangzhou 310015, ChinaSchool of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; Corresponding author.Cryogenic Center, Hangzhou City University, Hangzhou 310015, China; Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Zhejiang University, Hangzhou 310027, ChinaImproving the efficiency of the GM cryocoolers is of great importance for energy saving and CO2 emission reduction due to the large amount of cryocoolers installed in the emerging fields of semiconductor manufacture and High Temperature Superconductors (HTS) cooling. Previous studies mainly focused on the losses analysis and optimization on the part of cold head, but the details of losses distribution in the parts of compressor and rotary valve were seldom carried out. In this paper, a numerical model of a single stage GM cryocooler including compressor, rotary valve and expander is built, and the feasibility of the model is verified by the experimental results. The losses characteristics of the whole cryocooler are studied based on the exergy analysis method with the help of the numerical model. The results indicate that the main losses are occurred in compressor and rotary valve, the value of exergy loss in compressor decrease with the cooling temperature, and accounts for more than 60% at all cooling temperature. The loss in rotary valve accounts for about 20% of the input electric power, and it does not significantly vary at different cooling temperatures. Pressure drop dominates the loss in the compressor and rotary valve. The insufficient heat exchange between the working gas and regenerative material is the main loss in regenerator, and the losses in regenerator increase significantly with the decrease of cooling temperature when the compressor and rotary valve are fixed. This study provides useful guides for the optimization of GM-type cryocoolers.http://www.sciencedirect.com/science/article/pii/S2405844023056876GM cryocoolerExergy analysisCompressorHigh efficiencyPressure dropInsufficient heat exchange |
| spellingShingle | Qinyu Zhao Bo Wang Wei Chao Jun Cheng Yanrui Zhang Hua Zhang Zhihua Gan Numerical simulation and exergy analysis of a single-stage GM cryocooler Heliyon GM cryocooler Exergy analysis Compressor High efficiency Pressure drop Insufficient heat exchange |
| title | Numerical simulation and exergy analysis of a single-stage GM cryocooler |
| title_full | Numerical simulation and exergy analysis of a single-stage GM cryocooler |
| title_fullStr | Numerical simulation and exergy analysis of a single-stage GM cryocooler |
| title_full_unstemmed | Numerical simulation and exergy analysis of a single-stage GM cryocooler |
| title_short | Numerical simulation and exergy analysis of a single-stage GM cryocooler |
| title_sort | numerical simulation and exergy analysis of a single stage gm cryocooler |
| topic | GM cryocooler Exergy analysis Compressor High efficiency Pressure drop Insufficient heat exchange |
| url | http://www.sciencedirect.com/science/article/pii/S2405844023056876 |
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