THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Zhongcheng Sun

,

Zhixia He

,

Mingzhi Yu

RESEARCH ON HEAT TRANSFER CHARACTERISTICS AND BOREHOLE FIELD LAYOUT OF GROUND HEAT EXCHANGERS TO ALLEVIATE THERMAL ACCUMULATION WITH GROUNDWATER ADVECTION

ABSTRACT
The heat transfer performance of ground heat exchanger is significant to the ground source heat pump. The soil thermal parameters, the groundwater advection and the different borehole field layout are important factors to affect the performance of ground heat exchanger. Therefore, the influence of groundwater advection velocity, soil physical parameters and different borehole field layout on the soil temperature distribution and evolution around the ground heat exchanger has been analyzed and studied with unbalanced seasonal thermal load based on the moving finite line heat source model with groundwater advection. The results show that the heat accumulation is easy to occur as the time develops when the groundwater advection is taken into consideration. No matter what type of geological condition is employed, a reasonable borehole field layout can effectively avoid heat accumulation problems under the condition of keeping the same amount boreholes without changing the original ground area. The borehole field layout dispersed along the center line of the advection and concentrated in the advection downstream relatively can effectively reduce the heat accumulation.
KEYWORDS
ground heat exchanger, groundwater advection, borehole field layout, heat transfer, heat accumulation
PAPER SUBMITTED: 2020-08-22
PAPER REVISED: 2020-12-17
PAPER ACCEPTED: 2021-03-06
PUBLISHED ONLINE: 2021-05-16
DOI REFERENCE: https://doi.org/10.2298/TSCI200822164S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 4, PAGES [2781 - 2794]
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Research on heat transfer characteristics and borehole field layout of ground heat exchangers to alleviate thermal accumulation with groundwater advection

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence