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Open AccessArticle

Ground-Source Heat Pumps with Horizontal Heat Exchangers for Space Cooling in the Hot Tropical Climate of Thailand

1
Renewable Research Center, National Institute of Advanced Industrial Science and Technology, Japan 2-2-9 Machiikedai, Koriyama-shi, Fukushima-ken 963-0298, Japan
2
Department of Geology, Faculty of Science, Chulalongkorn University 254 Phayathai Rd, Patumwan, Bangkok 10330, Thailand
3
Mining Museum, Akita University, 43 Tegatahebino, Akita-shi, Akita-ken 010-0851, Japan
4
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, Bangkok 10330, Thailand
5
Research Unit Control of Emerging Micropollutants in Environment, Chulalongkorn University, Bangkok 10330, Thailand
6
Department of Mineral Resources (DMR) King Rama VI Road, Ratchatewi 10400, Bangkok
*
Author to whom correspondence should be addressed.
Energies 2019, 12(7), 1274; https://doi.org/10.3390/en12071274
Received: 25 February 2019 / Revised: 22 March 2019 / Accepted: 29 March 2019 / Published: 2 April 2019
The cooling of spaces in tropical regions, such as Southeast Asia, consumes a lot of energy. Additionally, rapid population and economic growth are resulting in an increasing demand for space cooling. The ground-source heat pump has been proven a reliable, cost-effective, safe, and environmentally-friendly alternative for cooling and heating spaces in various countries. In tropical countries, the presumption that the ground-source heat pump may not provide better thermal performance than the normal air-source heat pump arises because the difference between ground and atmospheric temperatures is essentially low. This paper reports the potential use of a ground-source heat pump with horizontal heat exchangers in a tropical country—Thailand. Daily operational data of two ground-source heat pumps and an air-source heat pump during a two-month operation are analyzed and compared. Life cycle cost analysis and CO2 emission estimation are adopted to evaluate the economic value of ground-source heat pump investment and potential CO2 reduction through the use of ground-source heat pumps, in comparison with the case for air-source heat pumps. It was found that the ground-source heat pumps consume 17.1% and 18.4% less electricity than the air-source heat pump during this period. Local production of heat pumps and heat exchangers, as well as rapid regional economic growth, can be positive factors for future ground-source heat pump application, not only in Thailand but also southeast Asian countries. View Full-Text
Keywords: ground source heat pump; tropical climate; horizontal heat exchanger ground source heat pump; tropical climate; horizontal heat exchanger
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Widiatmojo, A.; Chokchai, S.; Takashima, I.; Uchida, Y.; Yasukawa, K.; Chotpantarat, S.; Charusiri, P. Ground-Source Heat Pumps with Horizontal Heat Exchangers for Space Cooling in the Hot Tropical Climate of Thailand. Energies 2019, 12, 1274.

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