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Influence on thermal response test by groundwater flow in vertical fractures in hard rock

Gehlin, S E A and Hellström, Göran LU (2003) In Renewable Energy 28(14). p.2221-2238
Abstract
In this paper different approaches to groundwater flow and its effect in the vicinity of a borehole ground heat exchanger are discussed. The common assumption that groundwater flow in hard rock may be modelled as a homogeneous flow in a medium with an effective porosity is confronted and models for heat transfer due to groundwater flow in fractures and fracture zones are presented especially from a thermal response test point of view. The results indicate that groundwater flow in fractures even at relatively low specific flow rates may cause significantly enhanced heat transfer, although a continuum approach with the same basic assumptions would suggest otherwise. (C) 2003 Elsevier Science Ltd. All rights reserved.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
groundwater, thermal conductivity, thermal response test, ground heat exchanger, borehole
in
Renewable Energy
volume
28
issue
14
pages
2221 - 2238
publisher
Elsevier
external identifiers
  • wos:000184107900006
  • scopus:0038269631
ISSN
0960-1481
DOI
language
English
LU publication?
yes
id
3d48fa56-f733-43f3-bfb1-bec52d0716cf (old id 306243)
date added to LUP
2007-09-03 10:02:03
date last changed
2018-06-17 03:46:58
@article{3d48fa56-f733-43f3-bfb1-bec52d0716cf,
  abstract     = {In this paper different approaches to groundwater flow and its effect in the vicinity of a borehole ground heat exchanger are discussed. The common assumption that groundwater flow in hard rock may be modelled as a homogeneous flow in a medium with an effective porosity is confronted and models for heat transfer due to groundwater flow in fractures and fracture zones are presented especially from a thermal response test point of view. The results indicate that groundwater flow in fractures even at relatively low specific flow rates may cause significantly enhanced heat transfer, although a continuum approach with the same basic assumptions would suggest otherwise. (C) 2003 Elsevier Science Ltd. All rights reserved.},
  author       = {Gehlin, S E A and Hellström, Göran},
  issn         = {0960-1481},
  keyword      = {groundwater,thermal conductivity,thermal response test,ground heat exchanger,borehole},
  language     = {eng},
  number       = {14},
  pages        = {2221--2238},
  publisher    = {Elsevier},
  series       = {Renewable Energy},
  title        = {Influence on thermal response test by groundwater flow in vertical fractures in hard rock},
  url          = {http://dx.doi.org/},
  volume       = {28},
  year         = {2003},
}