Exergy analysis of large temperature difference series air conditioners in subway stations
In view of the large difference in the heat and humidity ratio of each air-conditioning zone in the subway, the unified cooling and dehumidification method is adopted, which changes the traditional connection mode of air-conditioning terminal in parallel. A cooling system of air-conditioning termina...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2020-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/25/e3sconf_caes2020_04067.pdf |
| _version_ | 1818963683862118400 |
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| author | jian Kong Xiang quan Bi Hai Lei He |
| author_facet | jian Kong Xiang quan Bi Hai Lei He |
| author_sort | jian Kong Xiang |
| collection | DOAJ |
| description | In view of the large difference in the heat and humidity ratio of each air-conditioning zone in the subway, the unified cooling and dehumidification method is adopted, which changes the traditional connection mode of air-conditioning terminal in parallel. A cooling system of air-conditioning terminal surface cooler in series, i.e. large temperature difference series cooling system, is applied to the subway station. The large temperature difference series cooling system is divided into three subsystems: cooling water system, chilled water system and end refrigeration system. The second law of thermodynamics, namely the law of exergy equilibrium and thermoeconomics, is used to analyze the feasibility and economy of the large temperature difference series system and its subsystems. After comparing energy consumption and economy with the conventional air conditioning system, it was found that the exergy efficiency of the chilled water system using the large temperature difference series cooling system was reduced. However, the exergy efficiency of the end refrigeration system in the subway equipment area has been significantly improved, saving electricity costs, and the investment can be recovered in 3.7 years, and the exergy cost has dropped significantly. The use of a large temperature difference series cooling system in a subway station can achieve the effect of energy saving and cost reduction. |
| first_indexed | 2024-12-20T12:49:07Z |
| format | Article |
| id | doaj.art-0794e5da7f8949b1b0cdf4e35676a175 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-20T12:49:07Z |
| publishDate | 2020-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-0794e5da7f8949b1b0cdf4e35676a1752022-12-21T19:40:12ZengEDP SciencesE3S Web of Conferences2267-12422020-01-011650406710.1051/e3sconf/202016504067e3sconf_caes2020_04067Exergy analysis of large temperature difference series air conditioners in subway stationsjian Kong Xiang0quan Bi Hai1Lei He2Department of HVAC, Southwest Jiao tong UniversityDepartment of HVAC, Southwest Jiao tong UniversityChina Railway First Survey and Design Institute Group Co., LtdIn view of the large difference in the heat and humidity ratio of each air-conditioning zone in the subway, the unified cooling and dehumidification method is adopted, which changes the traditional connection mode of air-conditioning terminal in parallel. A cooling system of air-conditioning terminal surface cooler in series, i.e. large temperature difference series cooling system, is applied to the subway station. The large temperature difference series cooling system is divided into three subsystems: cooling water system, chilled water system and end refrigeration system. The second law of thermodynamics, namely the law of exergy equilibrium and thermoeconomics, is used to analyze the feasibility and economy of the large temperature difference series system and its subsystems. After comparing energy consumption and economy with the conventional air conditioning system, it was found that the exergy efficiency of the chilled water system using the large temperature difference series cooling system was reduced. However, the exergy efficiency of the end refrigeration system in the subway equipment area has been significantly improved, saving electricity costs, and the investment can be recovered in 3.7 years, and the exergy cost has dropped significantly. The use of a large temperature difference series cooling system in a subway station can achieve the effect of energy saving and cost reduction.https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/25/e3sconf_caes2020_04067.pdf |
| spellingShingle | jian Kong Xiang quan Bi Hai Lei He Exergy analysis of large temperature difference series air conditioners in subway stations E3S Web of Conferences |
| title | Exergy analysis of large temperature difference series air conditioners in subway stations |
| title_full | Exergy analysis of large temperature difference series air conditioners in subway stations |
| title_fullStr | Exergy analysis of large temperature difference series air conditioners in subway stations |
| title_full_unstemmed | Exergy analysis of large temperature difference series air conditioners in subway stations |
| title_short | Exergy analysis of large temperature difference series air conditioners in subway stations |
| title_sort | exergy analysis of large temperature difference series air conditioners in subway stations |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2020/25/e3sconf_caes2020_04067.pdf |
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