A Study on the Operational Condition of a Ground Source Heat Pump in Bangkok Based on a Field Experiment and Simulation

Yutaro Shimada; Youhei Uchida; Isao Takashima; Srilert Chotpantarat; Arif Widiatmojo; Sasimook Chokchai; Punya Charusiri; Hideaki Kurishima; Koji Tokimatsu

doi:10.3390/en13010274

Energies (Jan 2020)

A Study on the Operational Condition of a Ground Source Heat Pump in Bangkok Based on a Field Experiment and Simulation

Yutaro Shimada,
Youhei Uchida,
Isao Takashima,
Srilert Chotpantarat,
Arif Widiatmojo,
Sasimook Chokchai,
Punya Charusiri,
Hideaki Kurishima,
Koji Tokimatsu

Affiliations

Yutaro Shimada: Department of Transdisciplinary Science and Engineering, School of Environment and Society, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama-shi, Kanagawa 226-8503, Japan
Youhei Uchida: Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, 2-2-9 Machiikedai, Koriyama-shi, Fukushima 963-0298, Japan
Isao Takashima: The Mining Museum, Graduate School of Engineering and Resource Science, Akita University, 1-1 Tegatagakuen-machi, Akita 010-8502, Japan
Srilert Chotpantarat: Department of Geology, Faculty of Science, Chulalongkorn University, 254 Phayathai Rd, Pathumwan, Bangkok 10330, Thailand
Arif Widiatmojo: Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, 2-2-9 Machiikedai, Koriyama-shi, Fukushima 963-0298, Japan
Sasimook Chokchai: Department of Geology, Faculty of Science, Chulalongkorn University, 254 Phayathai Rd, Pathumwan, Bangkok 10330, Thailand
Punya Charusiri: Department of Mineral Resources (DMR), King Rama VI Rd, Ratchatewi, Bangkok 10440, Thailand
Hideaki Kurishima: School of Architecture, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
Koji Tokimatsu: Department of Transdisciplinary Science and Engineering, School of Environment and Society, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama-shi, Kanagawa 226-8503, Japan

DOI: https://doi.org/10.3390/en13010274
Journal volume & issue: Vol. 13, no. 1
p. 274

Abstract

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The deployment of highly efficient cooling equipment is expected to promote energy savings and greenhouse gas emissions reductions in the tropics. A ground source heat pump (GSHP) has high energy-savings potential for use in Bangkok, Thailand. This study aimed to elucidate the operational conditions of a GSHP when used in Bangkok which was expected to achieve a higher efficiency than an air source heat pump (ASHP) over the long term. An operational experiment on a pilot facility in Bangkok and a simulation over a three-year GSHP operation were conducted. As a result of the operational experiment and simulation, the proposed operational condition was that the 90th percentile value of the hourly heat pump (HP) inlet temperature did not exceed 5 °C above that of the hourly annual ambient temperature during the third year of operation. When a GSHP designed based on this condition was utilized for a small government building, the required number of boreholes were 24, 4, and 3 for air-conditioned areas of 200, 40, and 25 m2, respectively, which achieved 40% energy savings. Thus, a small-scale GSHP in Bangkok designed based on the proposed condition can achieve high efficiency within space limitations.

Published in Energies

ISSN: 1996-1073 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology
Website: http://www.mdpi.com/journal/energies

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