Direct-supply chilled-water radiant-floor cooling system coupled with an earth‒air heat exchanger system: A case study in a building
To date, the use of shallow geothermal energy to directly cool and dehumidify a building in summer via a direct-supply chilled-water radiant-floor cooling (DS-RFC) system coupled with an earth‒air heat exchanger (EAHE) system has not been investigated. In this study, a physical test was performed in...
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24016174 |
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| author | Jiaming Yang Huiqing Cao Zhenwei Wang Yue Liu Wei Song Jiankai Dong |
| author_facet | Jiaming Yang Huiqing Cao Zhenwei Wang Yue Liu Wei Song Jiankai Dong |
| author_sort | Jiaming Yang |
| collection | DOAJ |
| description | To date, the use of shallow geothermal energy to directly cool and dehumidify a building in summer via a direct-supply chilled-water radiant-floor cooling (DS-RFC) system coupled with an earth‒air heat exchanger (EAHE) system has not been investigated. In this study, a physical test was performed in a real-world application room, where the cooling and dehumidification characteristics of DS-RFC and EAHE systems were individually studied to evaluate their application potential. The changes in the indoor air temperature and humidity and in the soil temperature when the two systems were operated independently were quantitatively analyzed. Additionally, the effects of the coupled DS-RFC/EAHE system on the indoor environment were evaluated for three air-supply inlet locations. The results showed that the DS-RFC system had a superior cooling effect but almost no dehumidification ability; the change in the humidity ratio was less than 2.00 g/kg. The EAHE system had a superior dehumidification effect, where the change in the humidity ratio exceeded 5.00 g/kg. When the DS-RFC system was operating, different air-supply inlet positions significantly affected the change states of the indoor-air state parameters. The indoor temperature was primarily concentrated at 25–27 °C, and the relative humidity was 83–88 %. This study provides rational support for a building cooling model in which a DS-RFC system coupled with an EAHE system is supplied directly by shallow geothermal energy in summer. |
| format | Article |
| id | doaj-art-2631b6f13ad146d7ad9938b70347d0b3 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-2631b6f13ad146d7ad9938b70347d0b32025-01-08T04:52:34ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105586Direct-supply chilled-water radiant-floor cooling system coupled with an earth‒air heat exchanger system: A case study in a buildingJiaming Yang0Huiqing Cao1Zhenwei Wang2Yue Liu3Wei Song4Jiankai Dong5School of Architecture and Design, Harbin Institute of Technology, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin, 150090, PR China; School of Civil and Engineering, North China University of Technology, Beijing, 100144, PR ChinaSchool of Civil and Engineering, North China University of Technology, Beijing, 100144, PR ChinaSchool of Civil and Engineering, North China University of Technology, Beijing, 100144, PR ChinaKey Laboratory of Shallow Geothermal Energy, Ministry of Natural Resources of the People's Republic of China, Beijing, 100195, PR ChinaSchool of Civil and Engineering, North China University of Technology, Beijing, 100144, PR China; Corresponding author. No. 5 Jinyuanzhuang Road, Beijing, 100144, PR China.School of Architecture and Design, Harbin Institute of Technology, Key Laboratory of Cold Region Urban and Rural Human Settlement Environment Science and Technology, Ministry of Industry and Information Technology, Harbin, 150090, PR ChinaTo date, the use of shallow geothermal energy to directly cool and dehumidify a building in summer via a direct-supply chilled-water radiant-floor cooling (DS-RFC) system coupled with an earth‒air heat exchanger (EAHE) system has not been investigated. In this study, a physical test was performed in a real-world application room, where the cooling and dehumidification characteristics of DS-RFC and EAHE systems were individually studied to evaluate their application potential. The changes in the indoor air temperature and humidity and in the soil temperature when the two systems were operated independently were quantitatively analyzed. Additionally, the effects of the coupled DS-RFC/EAHE system on the indoor environment were evaluated for three air-supply inlet locations. The results showed that the DS-RFC system had a superior cooling effect but almost no dehumidification ability; the change in the humidity ratio was less than 2.00 g/kg. The EAHE system had a superior dehumidification effect, where the change in the humidity ratio exceeded 5.00 g/kg. When the DS-RFC system was operating, different air-supply inlet positions significantly affected the change states of the indoor-air state parameters. The indoor temperature was primarily concentrated at 25–27 °C, and the relative humidity was 83–88 %. This study provides rational support for a building cooling model in which a DS-RFC system coupled with an EAHE system is supplied directly by shallow geothermal energy in summer.http://www.sciencedirect.com/science/article/pii/S2214157X24016174Radiant-floor cooling systemShallow geothermal energyDirect-supply chilled waterearth‒air heat exchangerGround-source heat pump |
| spellingShingle | Jiaming Yang Huiqing Cao Zhenwei Wang Yue Liu Wei Song Jiankai Dong Direct-supply chilled-water radiant-floor cooling system coupled with an earth‒air heat exchanger system: A case study in a building Case Studies in Thermal Engineering Radiant-floor cooling system Shallow geothermal energy Direct-supply chilled water earth‒air heat exchanger Ground-source heat pump |
| title | Direct-supply chilled-water radiant-floor cooling system coupled with an earth‒air heat exchanger system: A case study in a building |
| title_full | Direct-supply chilled-water radiant-floor cooling system coupled with an earth‒air heat exchanger system: A case study in a building |
| title_fullStr | Direct-supply chilled-water radiant-floor cooling system coupled with an earth‒air heat exchanger system: A case study in a building |
| title_full_unstemmed | Direct-supply chilled-water radiant-floor cooling system coupled with an earth‒air heat exchanger system: A case study in a building |
| title_short | Direct-supply chilled-water radiant-floor cooling system coupled with an earth‒air heat exchanger system: A case study in a building |
| title_sort | direct supply chilled water radiant floor cooling system coupled with an earth air heat exchanger system a case study in a building |
| topic | Radiant-floor cooling system Shallow geothermal energy Direct-supply chilled water earth‒air heat exchanger Ground-source heat pump |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24016174 |
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