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Calculation of Borehole Thermal Resistance

Javed, Saqib LU and Spitler, Jeffrey D (2016) In Woodhead Publishing Series in Energy p.63-95
Abstract
The borehole thermal resistance – that is, the thermal resistance between the fluid in the U-tube and the borehole wall – is a key performance characteristic of a closed-loop borehole ground heat exchanger. Lower borehole thermal resistance leads to better system performance. Since the original identification of the concept borehole thermal resistance by Mogensen (1983), there have been numerous methods proposed for calculating this. In this chapter, we present methods for calculating local borehole thermal resistance and effective borehole thermal resistance which account for short-circuiting between the upward and downward-flowing legs of the ground heat exchanger. We also compare a wide range of simple, relatively easy-to-calculate... (More)
The borehole thermal resistance – that is, the thermal resistance between the fluid in the U-tube and the borehole wall – is a key performance characteristic of a closed-loop borehole ground heat exchanger. Lower borehole thermal resistance leads to better system performance. Since the original identification of the concept borehole thermal resistance by Mogensen (1983), there have been numerous methods proposed for calculating this. In this chapter, we present methods for calculating local borehole thermal resistance and effective borehole thermal resistance which account for short-circuiting between the upward and downward-flowing legs of the ground heat exchanger. We also compare a wide range of simple, relatively easy-to-calculate methods to a detailed reference method and recommend suitable simplified methods. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Borehole thermal resistance, Grout resistance, Local Resistance, Effective resistance
in
Woodhead Publishing Series in Energy
editor
Rees, Simon
pages
63 - 95
publisher
Elsevier under the Woodhead Publishing imprint
ISBN
978-0-08-100311-4
DOI
10.1016/B978-0-08-100311-4.00003-0
language
English
LU publication?
yes
id
81e4e2f3-3509-4227-a57a-8e9dd2dd1f28
date added to LUP
2016-07-23 13:24:28
date last changed
2016-08-12 08:24:02
@misc{81e4e2f3-3509-4227-a57a-8e9dd2dd1f28,
  abstract     = {The borehole thermal resistance – that is, the thermal resistance between the fluid in the U-tube and the borehole wall – is a key performance characteristic of a closed-loop borehole ground heat exchanger. Lower borehole thermal resistance leads to better system performance. Since the original identification of the concept borehole thermal resistance by Mogensen (1983), there have been numerous methods proposed for calculating this. In this chapter, we present methods for calculating local borehole thermal resistance and effective borehole thermal resistance which account for short-circuiting between the upward and downward-flowing legs of the ground heat exchanger. We also compare a wide range of simple, relatively easy-to-calculate methods to a detailed reference method and recommend suitable simplified methods.},
  author       = {Javed, Saqib and Spitler, Jeffrey D},
  editor       = {Rees, Simon},
  isbn         = {978-0-08-100311-4},
  keyword      = {Borehole thermal resistance,Grout resistance,Local Resistance,Effective resistance},
  language     = {eng},
  pages        = {63--95},
  publisher    = {ARRAY(0xb463068)},
  series       = {Woodhead Publishing Series in Energy},
  title        = {Calculation of Borehole Thermal Resistance},
  url          = {http://dx.doi.org/10.1016/B978-0-08-100311-4.00003-0},
  year         = {2016},
}