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dc.contributor.author이승원-
dc.date.accessioned2019-03-12T02:21:06Z-
dc.date.available2019-03-12T02:21:06Z-
dc.date.issued2016-10-
dc.identifier.citationENERGY AND BUILDINGS, v. 129, Page. 344-356en_US
dc.identifier.issn0378-7788-
dc.identifier.issn1872-6178-
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0378778816306831?via%3Dihub-
dc.identifier.urihttps://repository.hanyang.ac.kr/handle/20.500.11754/100709-
dc.description.abstractRecently, the energy pile has been introduced as a viable alternative to the conventional closed-loop vertical ground heat exchanger (GHEX). The energy pile contains a heat exchange pipe inside the pile foundation and allows a circulation of working fluid through the pipe inducing heat exchange with the ground formation. In this paper, a series of thermal performance tests was conducted on two coil-type cast-in-place energy piles with different coil pitches, 200 mm and 500 mm, to evaluate the effect of coil pitch on the heat exchange performance of energy piles. Thermal performance tests were carried out by applying intermittent (8 h operating-16h pause) artificial cooling and heating loads with the aid of a constant-temperature water bath. The experimental result indicated that the heat exchange rate per pile length was not directly proportional to the installed pipe length because the tight coil pitch caused thermal interference between each pipe loop. In addition, a parametric study was conducted by computational fluid-dynamic (CFD) simulations to assess the effect of coil pitch and thermal interference on the thermal performance. The CFD model was verified by comparing the numerical simulation results with the field test data. Finally, an optimum coil pitch in the test bed condition was proposed considering the thermal performance and the economic feasibility of coil-type cast-in-place energy piles. (C) 2016 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipThis research was supported by the National Research Foundation of Korea Government (NRF-2014R1A2A2A01007883) and by the Korea Institute of Energy Technology Evaluation and Planning (KETEP), Ministry of Knowledge Economy (Grant No. 20153030111110).en_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE SAen_US
dc.subjectCast-in-place energy pileen_US
dc.subjectThermal performance testen_US
dc.subjectCoil-type ground heat exchangeren_US
dc.subjectComputational fluid dynamic analysisen_US
dc.subjectHeat exchange efficiencyen_US
dc.subjectOptimum coil pitchen_US
dc.titleInfluence of coil pitch on thermal performance of coil-type cast-in-place energy pilesen_US
dc.typeArticleen_US
dc.relation.volume129-
dc.identifier.doi10.1016/j.enbuild.2016.08.005-
dc.relation.page344-356-
dc.relation.journalENERGY AND BUILDINGS-
dc.contributor.googleauthorPark, Sangwoo-
dc.contributor.googleauthorLee, Seokjae-
dc.contributor.googleauthorLee, Dongseop-
dc.contributor.googleauthorLee, Sean S.-
dc.contributor.googleauthorChoi, Hangseok-
dc.relation.code2016007202-
dc.sector.campusS-
dc.sector.daehakCOLLEGE OF ENGINEERING[S]-
dc.sector.departmentDEPARTMENT OF EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING-
dc.identifier.pidseanlee-
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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