Numerical simulations on potential application of ground source heat pumps with vertical ground heat exchangers in Bangkok and Hanoi
Southeast Asian countries have experienced fast economic growth for several decades. This rapid growth has been accompanied by an increased energy demand per capita. Ground source heat pumps could be a solution to improve energy efficiency. However, there are several concerns with the introduction o...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Energy Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484721010866 |
| _version_ | 1819098028364005376 |
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| author | Arif Widiatmojo Youhei Uchida Hikari Fujii Hiroyuki Kosukegawa Isao Takashima Yutaro Shimada Srilert Chotpantarat Punya Charusiri Trong Thang Tran |
| author_facet | Arif Widiatmojo Youhei Uchida Hikari Fujii Hiroyuki Kosukegawa Isao Takashima Yutaro Shimada Srilert Chotpantarat Punya Charusiri Trong Thang Tran |
| author_sort | Arif Widiatmojo |
| collection | DOAJ |
| description | Southeast Asian countries have experienced fast economic growth for several decades. This rapid growth has been accompanied by an increased energy demand per capita. Ground source heat pumps could be a solution to improve energy efficiency. However, there are several concerns with the introduction of this technology. Unlike in four-season countries, where a seasonal balance between cooling and heating demand exists, the use of ground source heat pumps in Southeast Asia is primarily for cooling. The temperature difference between the ground and air is also small. In this paper, we evaluate the first thermal response test results ever performed in Southeast Asia at sites in Bangkok and Hanoi. Borehole heat exchanger models were established on the basis of the apparent thermal conductivities according to the thermal response test results. The borehole heat exchanger models were then used to evaluate the five-year performance of a ground source heat pump in a typical small-sized detached office building under specific climatic conditions. The increasing borehole heat exchanger temperature is unavoidable because of the absence of heat extraction. Consequently, the coefficient of performance decreasing, along with the increasing power consumption, over time. Yet, the results indicating that the ground source heat pump can still provide good thermal performance. We also evaluated the effect of the number of boreholes on the ground source heat pump performance. The results indicate that the maximum coefficient of performance can be relatively improved by 16.1% and 14.9% in Bangkok and Hanoi, respectively, using 10 instead of 6 boreholes. |
| first_indexed | 2024-12-22T00:24:28Z |
| format | Article |
| id | doaj.art-6c7673bf525e433aa49413d616de7f9d |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-12-22T00:24:28Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-6c7673bf525e433aa49413d616de7f9d2022-12-21T18:45:06ZengElsevierEnergy Reports2352-48472021-11-01769326944Numerical simulations on potential application of ground source heat pumps with vertical ground heat exchangers in Bangkok and HanoiArif Widiatmojo0Youhei Uchida1Hikari Fujii2Hiroyuki Kosukegawa3Isao Takashima4Yutaro Shimada5Srilert Chotpantarat6Punya Charusiri7Trong Thang Tran8Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, Japan; Corresponding author.Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, JapanGraduate School of International Resource Sciences, Akita University, JapanGraduate School of International Resource Sciences, Akita University, JapanMining Museum, Akita University, JapanDepartment of Transdisciplinary Science and Engineering, School of Environment and Society, Tokyo Institute of Technology, JapanDepartment of Geology, Faculty of Science, Chulalongkorn University, 254 Phayathai Rd, Patumwan, Thailand; Research Program on Controls of Hazardous Contaminants in Raw Water Resources for Water Scarcity Resilience, Center of Excellence on Hazardous Substance Management (HSM), Chulalongkorn University, Thailand; Research Unit Control of Emerging Micropollutants in Environment, Chulalongkorn University, ThailandDepartment of Mineral Resources, Thailand; MESA Research Unit, Chulalongkorn University, Bangkok 10330, ThailandVietnam Institute of Geosciences and Mineral Resources, 67 Chien Thang Street, Hanoi, Viet NamSoutheast Asian countries have experienced fast economic growth for several decades. This rapid growth has been accompanied by an increased energy demand per capita. Ground source heat pumps could be a solution to improve energy efficiency. However, there are several concerns with the introduction of this technology. Unlike in four-season countries, where a seasonal balance between cooling and heating demand exists, the use of ground source heat pumps in Southeast Asia is primarily for cooling. The temperature difference between the ground and air is also small. In this paper, we evaluate the first thermal response test results ever performed in Southeast Asia at sites in Bangkok and Hanoi. Borehole heat exchanger models were established on the basis of the apparent thermal conductivities according to the thermal response test results. The borehole heat exchanger models were then used to evaluate the five-year performance of a ground source heat pump in a typical small-sized detached office building under specific climatic conditions. The increasing borehole heat exchanger temperature is unavoidable because of the absence of heat extraction. Consequently, the coefficient of performance decreasing, along with the increasing power consumption, over time. Yet, the results indicating that the ground source heat pump can still provide good thermal performance. We also evaluated the effect of the number of boreholes on the ground source heat pump performance. The results indicate that the maximum coefficient of performance can be relatively improved by 16.1% and 14.9% in Bangkok and Hanoi, respectively, using 10 instead of 6 boreholes.http://www.sciencedirect.com/science/article/pii/S2352484721010866Ground source heat pumpSoutheast AsiaSpace coolingThermal response test |
| spellingShingle | Arif Widiatmojo Youhei Uchida Hikari Fujii Hiroyuki Kosukegawa Isao Takashima Yutaro Shimada Srilert Chotpantarat Punya Charusiri Trong Thang Tran Numerical simulations on potential application of ground source heat pumps with vertical ground heat exchangers in Bangkok and Hanoi Energy Reports Ground source heat pump Southeast Asia Space cooling Thermal response test |
| title | Numerical simulations on potential application of ground source heat pumps with vertical ground heat exchangers in Bangkok and Hanoi |
| title_full | Numerical simulations on potential application of ground source heat pumps with vertical ground heat exchangers in Bangkok and Hanoi |
| title_fullStr | Numerical simulations on potential application of ground source heat pumps with vertical ground heat exchangers in Bangkok and Hanoi |
| title_full_unstemmed | Numerical simulations on potential application of ground source heat pumps with vertical ground heat exchangers in Bangkok and Hanoi |
| title_short | Numerical simulations on potential application of ground source heat pumps with vertical ground heat exchangers in Bangkok and Hanoi |
| title_sort | numerical simulations on potential application of ground source heat pumps with vertical ground heat exchangers in bangkok and hanoi |
| topic | Ground source heat pump Southeast Asia Space cooling Thermal response test |
| url | http://www.sciencedirect.com/science/article/pii/S2352484721010866 |
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