A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating
In many public buildings in northern China, direct expansion air conditioning systems are used for cooling, and the hot water from district heating networks is often used for heating, which requires two types of terminals. A multi-connected air conditioner with refrigerant and water using hot water...
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| Format: | Article |
| Language: | zho |
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Journal of Refrigeration Magazines Agency Co., Ltd.
2025-01-01
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| Series: | Zhileng xuebao |
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| Online Access: | http://www.zhilengxuebao.com/thesisDetails?columnId=67630373&Fpath=home&index=0 |
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| author | 查富海 王 源 李先庭 国德防 顾 超 |
| author_facet | 查富海 王 源 李先庭 国德防 顾 超 |
| author_sort | 查富海 |
| collection | DOAJ |
| description | In many public buildings in northern China, direct expansion air conditioning systems are used for cooling, and the hot water from district heating networks is often used for heating, which requires two types of terminals. A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating is proposed in this study. Three-fluid heat exchangers are used in the indoor units of the system, which can use hot water from district heating system or heat pumps for room heating, achieving flexible switching between direct expansion air conditioning system and district heating system. Taking an office building in Beijing as an example, the air conditioning system is selected in the summer designed condition. The simulation model of the system is established, and the heating effect of the system during the heating season and transition season is analyzed. The results show that the user side water temperature required for the system during the heating season is less than 54 ℃; when using direct expansion system during the transition season for heating, the unit capacity is higher than the peak heating load during the transition season, and the energy efficiency exceeds 3.5 within 49% of the operating time. The system proposed in this article utilizes one terminal to ensure summer cooling and winter heating needs, and can use direct expansion system for heating after district heating system shutdown, simplifying the existing system form and improving heating comfort. |
| format | Article |
| id | doaj-art-48c5dff54b144fee82110ca79f0b1cef |
| institution | DOAJ |
| issn | 0253-4339 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-48c5dff54b144fee82110ca79f0b1cef2025-08-20T02:47:18ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392025-01-0167630373A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating查富海王 源李先庭国德防顾 超In many public buildings in northern China, direct expansion air conditioning systems are used for cooling, and the hot water from district heating networks is often used for heating, which requires two types of terminals. A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating is proposed in this study. Three-fluid heat exchangers are used in the indoor units of the system, which can use hot water from district heating system or heat pumps for room heating, achieving flexible switching between direct expansion air conditioning system and district heating system. Taking an office building in Beijing as an example, the air conditioning system is selected in the summer designed condition. The simulation model of the system is established, and the heating effect of the system during the heating season and transition season is analyzed. The results show that the user side water temperature required for the system during the heating season is less than 54 ℃; when using direct expansion system during the transition season for heating, the unit capacity is higher than the peak heating load during the transition season, and the energy efficiency exceeds 3.5 within 49% of the operating time. The system proposed in this article utilizes one terminal to ensure summer cooling and winter heating needs, and can use direct expansion system for heating after district heating system shutdown, simplifying the existing system form and improving heating comfort.http://www.zhilengxuebao.com/thesisDetails?columnId=67630373&Fpath=home&index=0multi-connected air conditioner with refrigerant and waterthree-fluid heat exchangerair conditioning systemdistrict heating systemroom heating |
| spellingShingle | 查富海 王 源 李先庭 国德防 顾 超 A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating Zhileng xuebao multi-connected air conditioner with refrigerant and water three-fluid heat exchanger air conditioning system district heating system room heating |
| title | A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating |
| title_full | A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating |
| title_fullStr | A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating |
| title_full_unstemmed | A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating |
| title_short | A multi-connected air conditioner with refrigerant and water using hot water from district heating system for direct heating |
| title_sort | multi connected air conditioner with refrigerant and water using hot water from district heating system for direct heating |
| topic | multi-connected air conditioner with refrigerant and water three-fluid heat exchanger air conditioning system district heating system room heating |
| url | http://www.zhilengxuebao.com/thesisDetails?columnId=67630373&Fpath=home&index=0 |
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