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Influential Factors on Thermal Performance of Energy Slabs Equipped with an Insulation Layer

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Abstract
The energy slab is a slab structure in a building that encases heat exchangers to utilize geothermal energy
for heating and cooling of the building. In the energy slabs, the presence of thermal insulation layers is
crucially important compared to those of the conventional Ground Heat Exchanger (GHEX). In this paper,
a computational fluid dynamics (CFD) model was developed by calibrating with the result of the in-situ
thermal performance test (TPT) to comprehensively assess the effect of influential factors on the thermal
performance of energy slabs. Note that the thermal conductivity of ground formations and the flow rate
of working fluid significantly influence the thermal performance of energy slabs. Especially in the energy
slabs, the existence of a thermal insulation layer with appropriate thermal properties is significantly
important to relieve the thermal interference induced by ambient air temperature. Considering the
performance of thermal insulation and economic feasibility, a PF (phenol foam) board is found to be the
suitable material for the energy slab considered in this paper.
Author(s)
박상우원종묵이석재최항석
Issued Date
2021
Type
Article
Keyword
Energy slabGround heat exchanger (GHEX)Thermal performance test (TPT)Computational fluid-dynamic (CFD) modelThermal insulation layer
DOI
10.1016/j.renene.2021.04.090
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9196
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_gale_infotracacademiconefile_A664845375&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Influential%20Factors%20on%20Thermal%20Performance%20of%20Energy%20Slabs%20Equipped%20with%20an%20Insulation%20Layer&offset=0&pcAvailability=true
Publisher
RENEWABLE ENERGY
Location
영국
Language
영어
ISSN
0960-1481
Citation Volume
174
Citation Number
1
Citation Start Page
823
Citation End Page
834
Appears in Collections:
Engineering > Civil and Environmental Engineering
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