Influence of Different Refrigerants on Motor Cooling Process and System Performance of Compressor with Gas Bearings
Motor cooling is key to the reliable operation of centrifugal refrigeration compressors with gas bearings. A mathematical model of a centrifugal refrigeration compressor with gas bearings was devised, and the influences of different refrigerants on the motor cooling process and refrigeration system...
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| Format: | Article |
| Language: | zho |
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Journal of Refrigeration Magazines Agency Co., Ltd.
2023-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2023.06.110 |
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| author | Liu Yiteng Gao Yiming Liu Guangbin Song Junnan Gong Jieming |
| author_facet | Liu Yiteng Gao Yiming Liu Guangbin Song Junnan Gong Jieming |
| author_sort | Liu Yiteng |
| collection | DOAJ |
| description | Motor cooling is key to the reliable operation of centrifugal refrigeration compressors with gas bearings. A mathematical model of a centrifugal refrigeration compressor with gas bearings was devised, and the influences of different refrigerants on the motor cooling process and refrigeration system performance were analyzed. The results show that the internal temperature of the motor reaches the highest when R1234ze (E) is used, and the maximum temperature of the permanent magnet of the motor is 60–90 °C higher than that with R134a and R1234yf. When using the three refrigerants, the average winding temperature of the motor decreases with an increase in the cooling inlet temperature. When R134a and R1234yf are used, the maximum temperature of the permanent magnet decreases with an increase in the cooling inlet temperature. When R1234ze (E) is used, the maximum temperature of the permanent magnet first increases and then decreases with the increase in cooling inlet temperature. The maximum temperature is reached when the cooling inlet temperature is approximately 25 ℃. The outlet vapor quality of the motor cooling circuit decreases by approximately 3%–5% when the cooling inlet temperature increases by 4.5 °C. Compared with traditional systems, systems with motor cooling branches can control the motor temperature within a safer operating range. However, systems using R134a, R1234yf, and R1234ze (E) have COPs reduced by 1.23%–1.82%, 1.23%–1.65%, and 1.14%–1.17%, respectively. |
| format | Article |
| id | doaj-art-9d7986c0539e4beb9af6a9f888723db7 |
| institution | OA Journals |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2023-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-9d7986c0539e4beb9af6a9f888723db72025-08-20T02:03:00ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392023-01-014466501689Influence of Different Refrigerants on Motor Cooling Process and System Performance of Compressor with Gas BearingsLiu YitengGao YimingLiu GuangbinSong JunnanGong JiemingMotor cooling is key to the reliable operation of centrifugal refrigeration compressors with gas bearings. A mathematical model of a centrifugal refrigeration compressor with gas bearings was devised, and the influences of different refrigerants on the motor cooling process and refrigeration system performance were analyzed. The results show that the internal temperature of the motor reaches the highest when R1234ze (E) is used, and the maximum temperature of the permanent magnet of the motor is 60–90 °C higher than that with R134a and R1234yf. When using the three refrigerants, the average winding temperature of the motor decreases with an increase in the cooling inlet temperature. When R134a and R1234yf are used, the maximum temperature of the permanent magnet decreases with an increase in the cooling inlet temperature. When R1234ze (E) is used, the maximum temperature of the permanent magnet first increases and then decreases with the increase in cooling inlet temperature. The maximum temperature is reached when the cooling inlet temperature is approximately 25 ℃. The outlet vapor quality of the motor cooling circuit decreases by approximately 3%–5% when the cooling inlet temperature increases by 4.5 °C. Compared with traditional systems, systems with motor cooling branches can control the motor temperature within a safer operating range. However, systems using R134a, R1234yf, and R1234ze (E) have COPs reduced by 1.23%–1.82%, 1.23%–1.65%, and 1.14%–1.17%, respectively.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2023.06.110compressorgas bearingrefrigerantCOP |
| spellingShingle | Liu Yiteng Gao Yiming Liu Guangbin Song Junnan Gong Jieming Influence of Different Refrigerants on Motor Cooling Process and System Performance of Compressor with Gas Bearings Zhileng xuebao compressor gas bearing refrigerant COP |
| title | Influence of Different Refrigerants on Motor Cooling Process and System Performance of Compressor with Gas Bearings |
| title_full | Influence of Different Refrigerants on Motor Cooling Process and System Performance of Compressor with Gas Bearings |
| title_fullStr | Influence of Different Refrigerants on Motor Cooling Process and System Performance of Compressor with Gas Bearings |
| title_full_unstemmed | Influence of Different Refrigerants on Motor Cooling Process and System Performance of Compressor with Gas Bearings |
| title_short | Influence of Different Refrigerants on Motor Cooling Process and System Performance of Compressor with Gas Bearings |
| title_sort | influence of different refrigerants on motor cooling process and system performance of compressor with gas bearings |
| topic | compressor gas bearing refrigerant COP |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2023.06.110 |
| work_keys_str_mv | AT liuyiteng influenceofdifferentrefrigerantsonmotorcoolingprocessandsystemperformanceofcompressorwithgasbearings AT gaoyiming influenceofdifferentrefrigerantsonmotorcoolingprocessandsystemperformanceofcompressorwithgasbearings AT liuguangbin influenceofdifferentrefrigerantsonmotorcoolingprocessandsystemperformanceofcompressorwithgasbearings AT songjunnan influenceofdifferentrefrigerantsonmotorcoolingprocessandsystemperformanceofcompressorwithgasbearings AT gongjieming influenceofdifferentrefrigerantsonmotorcoolingprocessandsystemperformanceofcompressorwithgasbearings |