Calculation of Borehole Thermal Resistance
(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:
https://lup.lub.lu.se/record/81e4e2f3-3509-4227-a57a-8e9dd2dd1f28
- author
- Javed, Saqib LU and Spitler, Jeffrey D
- organization
- publishing date
- 2016
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Borehole thermal resistance, Grout resistance, Local Resistance, Effective resistance
- host publication
- Advances in Ground-Source Heat Pump Systems.
- series title
- Woodhead Publishing Series in Energy
- editor
- Rees, Simon
- edition
- 1
- pages
- 63 - 95
- publisher
- Woodhead Publishing Limited
- external identifiers
-
- scopus:85008196465
- 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
- 2022-04-24 08:38:31
@inbook{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}},
booktitle = {{Advances in Ground-Source Heat Pump Systems.}},
editor = {{Rees, Simon}},
isbn = {{978-0-08-100311-4}},
keywords = {{Borehole thermal resistance; Grout resistance; Local Resistance; Effective resistance}},
language = {{eng}},
pages = {{63--95}},
publisher = {{Woodhead Publishing Limited}},
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}},
doi = {{10.1016/B978-0-08-100311-4.00003-0}},
year = {{2016}},
}