Effect of tube-in-tube configuration on thermal performance of coaxial-type ground heat exchanger
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 | Oh, Kwanggeun | - |
dc.contributor.author | Choi, Hangseok | - |
dc.date.accessioned | 2022-12-09T15:59:46Z | - |
dc.date.available | 2022-12-09T15:59:46Z | - |
dc.date.created | 2022-12-08 | - |
dc.date.issued | 2022-09 | - |
dc.identifier.issn | 0960-1481 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/146610 | - |
dc.description.abstract | Among various types of ground heat exchangers (GHEXs or GHEs), a coaxial-type GHEX exhibits outstanding thermal performance owing to the geometric characteristics of the concentric tube-in-tube configuration. In this study, the unique configuration of the coaxial-type GHEX was investigated through parametric studies, which provided the energy efficient configuration. A computational fluid dynamics (CFD) model was developed and verified by using the field test results for the coaxial-type GHEX constructed in a test bed. Then, the parametric studies were conducted using the developed CFD model for various influential factors (i.e., flow rate of a circulating fluid, hydraulic diameter, and thermal conductivities of inner pipe and bentonite grout), which were selected considering the tube-in-tube configuration. The thermal performance of the coaxial-type GHEX increased with an increase in the flow rate of a circulating fluid and the thermal conductivity of bentonite grout. In addition, the inner pipes of the coaxial-type GHEX should be composed of materials with a thermal conductivity lower than 0.025 W/(m.K) to relieve thermal interference between the outer and inner pipes. Notably, it was concluded that the coaxial-type GHEX should be designed to secure the sufficient heat exchangeable area and retention capacity of the circulating fluid. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | PLACE ENERGY PILE | - |
dc.subject | RESPONSE TEST | - |
dc.subject | CONDUCTIVITY | - |
dc.subject | EFFICIENCY | - |
dc.title | Effect of tube-in-tube configuration on thermal performance of coaxial-type ground heat exchanger | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Choi, Hangseok | - |
dc.identifier.doi | 10.1016/j.renene.2022.07.088 | - |
dc.identifier.scopusid | 2-s2.0-85135691417 | - |
dc.identifier.wosid | 000860779500002 | - |
dc.identifier.bibliographicCitation | RENEWABLE ENERGY, v.197, pp.518 - 527 | - |
dc.relation.isPartOf | RENEWABLE ENERGY | - |
dc.citation.title | RENEWABLE ENERGY | - |
dc.citation.volume | 197 | - |
dc.citation.startPage | 518 | - |
dc.citation.endPage | 527 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Energy & Fuels | - |
dc.relation.journalWebOfScienceCategory | Green & Sustainable Science & Technology | - |
dc.relation.journalWebOfScienceCategory | Energy & Fuels | - |
dc.subject.keywordPlus | PLACE ENERGY PILE | - |
dc.subject.keywordPlus | RESPONSE TEST | - |
dc.subject.keywordPlus | CONDUCTIVITY | - |
dc.subject.keywordPlus | EFFICIENCY | - |
dc.subject.keywordAuthor | Coaxial -type ground heat exchanger (GHEX) | - |
dc.subject.keywordAuthor | Turbulent flow | - |
dc.subject.keywordAuthor | Thermal performance | - |
dc.subject.keywordAuthor | Computational fluid dynamic (CFD) model | - |
dc.subject.keywordAuthor | Parametric study | - |
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