Performance evaluation of coaxial-type GHEX in GSHP system installed in Korean residential building
DC Field | Value | Language |
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dc.contributor.author | Lee, Seokjae | - |
dc.contributor.author | Park, Sangwoo | - |
dc.contributor.author | Kang, Minkyu | - |
dc.contributor.author | Choi, Hangseok | - |
dc.date.accessioned | 2021-08-30T02:49:41Z | - |
dc.date.available | 2021-08-30T02:49:41Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2021-03-15 | - |
dc.identifier.issn | 0378-7788 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/49473 | - |
dc.description.abstract | A coaxial-type ground heat exchanger (GHEX) is a closed-loop GHEX with heat exchange pipes in a borehole, arranged in a concentric tube-in-tube configuration. A coaxial-type GHEX enlarges the heat exchange area and induces turbulent flow more actively than conventional closed-loop GHEXs owing to the annular space formed by outer and inner pipes. Therefore, it improves the thermal performance of conventional GHEXs. Herein, the thermal performance of the coaxial-type GHEX was evaluated, and then compared with that of the closed-loop vertical GHEX. The Ground source heat pump (GSHP) system connected with the coaxial-type GHEXs was designed with the ground loop heat exchanger design program (i.e., GLHE-Pro). In accordance with the design, the GSHP system was constructed in a building basement, with four coaxial-type GHEXs and a closed-loop vertical GHEX for comparison purpose. Then, a series of field experiments (i.e., thermal response tests (TRTs), thermal performance tests (TPTs), short-term heating COP tests, and energy saving tests) were conducted to compare the thermal performance of the coaxial-type GHEXs and the closed-loop vertical GHEX with or without the GSHP system. As a result, the coaxial-type GHEX had 20% and 6.7% better thermal performance in TRT and TPT, respectively, than the closed-loop vertical GHEX. In addition, geothermal energy showed more stable performance with the coaxial-type GHEX in the GSHP system, than with the closed-loop vertical GHEX. (c) 2021 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Performance evaluation of coaxial-type GHEX in GSHP system installed in Korean residential building | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Choi, Hangseok | - |
dc.identifier.doi | 10.1016/j.enbuild.2021.110734 | - |
dc.identifier.scopusid | 2-s2.0-85100082569 | - |
dc.identifier.wosid | 000620911200004 | - |
dc.identifier.bibliographicCitation | ENERGY AND BUILDINGS, v.235 | - |
dc.relation.isPartOf | ENERGY AND BUILDINGS | - |
dc.citation.title | ENERGY AND BUILDINGS | - |
dc.citation.volume | 235 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Construction & Building Technology | - |
dc.relation.journalResearchArea | Energy & Fuels | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalWebOfScienceCategory | Construction & Building Technology | - |
dc.relation.journalWebOfScienceCategory | Energy & Fuels | - |
dc.relation.journalWebOfScienceCategory | Engineering, Civil | - |
dc.subject.keywordAuthor | Ground heat exchanger (GHEX) | - |
dc.subject.keywordAuthor | Coaxial-type GHEX | - |
dc.subject.keywordAuthor | Ground source heat pump (GSHP) | - |
dc.subject.keywordAuthor | Thermal response test (TRT) | - |
dc.subject.keywordAuthor | Thermal performance test (TPT) | - |
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