Imperial College London
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Dr David M. G. Taborda

Faculty of Engineering, Department of Civil and Environmental Engineering

Reader in Geomechanical Modelling
 
 
 
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Contact

 

+44 (0)20 7594 6033d.taborda Website

 
 
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Assistant

 

Ms Sue Feller +44 (0)20 7594 6077

 
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Location

 

432Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sailer:2017:10.1016/j.renene.2017.11.035,
author = {Sailer, E and Taborda, DMG and Zdravkovic},
doi = {10.1016/j.renene.2017.11.035},
journal = {Renewable Energy},
pages = {579--590},
title = {A new approach to estimating temperature fields around a group of vertical ground heat exchangers in two-dimensional analyses},
url = {http://dx.doi.org/10.1016/j.renene.2017.11.035},
volume = {118},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Vertical ground heat exchangers (VHEs), in the form of either Borehole Heat Exchanger (BHE) or thermo-active piles, are increasingly being deployed to provide low cost and sustainable heating and cooling to buildings. These are often installed within densely built urban environments, where adjacent foundation systems and underground structures can be affected by soil temperature changes induced by the heat exchangers. Therefore, they need to be considered in the geotechnical design of such structures, which typically involves carrying out two dimensional finite element plane strain analyses in order to assess their stability and performance. In such a scenario, it is common to model a line of heat exchangers as a planar source with one infinite dimension and a heat flux rate calculated by dividing the design extraction rate of a single heat exchanger by their spacing in the out-of-plane direction. This study shows that this approach largely overestimates the generated temperature field and proposes a simplified but accurate procedure to estimate the required heat flux to be applied to the planar heat sources in a 2D analysis. For this purpose, a correction factor, Full-size image (<1 K), is introduced which is shown to depend on geometric parameters and thermal ground properties.
AU  - Sailer,E
AU  - Taborda,DMG
AU  - Zdravkovic
DO  - 10.1016/j.renene.2017.11.035
EP  - 590
PY  - 2017///
SN  - 1879-0682
SP  - 579
TI  - A new approach to estimating temperature fields around a group of vertical ground heat exchangers in two-dimensional analyses
T2  - Renewable Energy
UR  - http://dx.doi.org/10.1016/j.renene.2017.11.035
UR  - http://hdl.handle.net/10044/1/53628
VL  - 118
ER  -
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