 Improved underground heat exchanger by using no-dig method for space heating and coolingYasuhiro Hamada, Makoto Nakamura, Hisashi Saitoh, Hideki Kubota and Kiyoshi Ochifuji Renewable Energy, 2007, vol. 32, issue 3, 480-495 Abstract: This paper describes experiments and analyses on an improved underground heat exchanger by using a no-dig method for the purpose of the cost reduction of a space heating and cooling system using underground thermal energy. First, the improved underground heat exchanger was installed on the campus of Hokkaido University, and it was shown that a ground source heat pump system utilizing the heat exchanger was sufficient for space heating and cooling. Second, evaluation program of the heat exchanger was developed, and the program was verified to give good predictions by comparing with experimental results. As a result of system simulations, an energy reduction for a system installation relative to a conventional vertical earth heat exchanger reached 78%. The primary energy reduction rate including the system installation and operation relative to a typical air source heat pump was 29%. Keywords: No-dig method; Underground thermal energy; Ground source heat pump; Space heating and cooling (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:32:y:2007:i:3:p:480-495 DOI: 10.1016/j.renene.2006.01.020 Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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