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Energy renovation strategies for office buildings using direct ground cooling systems

Arghand, Taha ; Javed, Saqib LU ; Trüschel, Anders and Dalenbäck, Jan olof (2021) In Science and Technology for the Built Environment
Abstract

Direct ground cooling systems (DGCS) can provide comfort cooling to buildings without the use of any refrigeration-based cooling methods. DGCS is an emerging technology, commonly used for new office buildings in cold climates. This study aims to evaluate the energy-saving possibilities of a DGCS compared to a conventional chiller system for an existing office building. A typical Swedish office building with a chiller-based cooling system and in need of an energy renovation is taken as a reference case. Various possible renovation measures are applied on the building and to the cooling system, and the results are evaluated in terms of borehole design and building energy demand. The results show that applying the DGCS substantially... (More)

Direct ground cooling systems (DGCS) can provide comfort cooling to buildings without the use of any refrigeration-based cooling methods. DGCS is an emerging technology, commonly used for new office buildings in cold climates. This study aims to evaluate the energy-saving possibilities of a DGCS compared to a conventional chiller system for an existing office building. A typical Swedish office building with a chiller-based cooling system and in need of an energy renovation is taken as a reference case. Various possible renovation measures are applied on the building and to the cooling system, and the results are evaluated in terms of borehole design and building energy demand. The results show that applying the DGCS substantially reduces the building’s purchased energy, as chiller electricity demand is eliminated. In addition, implementing the renovation measures to reduce the thermal demand of the building could further reduce purchased energy. The results suggest implementing the DGCS after performing the renovation measures. This may lead to a considerable reduction in the required borehole length and hence in the drilling costs. Results from this study provide useful inputs for designing boreholes in ground-coupled systems for new and existing office buildings.

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publishing date
type
Contribution to journal
publication status
epub
subject
in
Science and Technology for the Built Environment
pages
18 pages
publisher
Taylor & Francis
external identifiers
  • scopus:85102807602
ISSN
2374-4731
DOI
10.1080/23744731.2021.1890520
language
English
LU publication?
no
additional info
Publisher Copyright: © 2021 The Author(s). Published with license by Taylor & Francis Group, LLC. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
id
abc50980-12b2-44e8-ba19-696b0120f780
date added to LUP
2021-03-31 18:49:46
date last changed
2021-04-13 15:27:35
@article{abc50980-12b2-44e8-ba19-696b0120f780,
  abstract     = {<p>Direct ground cooling systems (DGCS) can provide comfort cooling to buildings without the use of any refrigeration-based cooling methods. DGCS is an emerging technology, commonly used for new office buildings in cold climates. This study aims to evaluate the energy-saving possibilities of a DGCS compared to a conventional chiller system for an existing office building. A typical Swedish office building with a chiller-based cooling system and in need of an energy renovation is taken as a reference case. Various possible renovation measures are applied on the building and to the cooling system, and the results are evaluated in terms of borehole design and building energy demand. The results show that applying the DGCS substantially reduces the building’s purchased energy, as chiller electricity demand is eliminated. In addition, implementing the renovation measures to reduce the thermal demand of the building could further reduce purchased energy. The results suggest implementing the DGCS after performing the renovation measures. This may lead to a considerable reduction in the required borehole length and hence in the drilling costs. Results from this study provide useful inputs for designing boreholes in ground-coupled systems for new and existing office buildings.</p>},
  author       = {Arghand, Taha and Javed, Saqib and Trüschel, Anders and Dalenbäck, Jan olof},
  issn         = {2374-4731},
  language     = {eng},
  month        = {03},
  publisher    = {Taylor & Francis},
  series       = {Science and Technology for the Built Environment},
  title        = {Energy renovation strategies for office buildings using direct ground cooling systems},
  url          = {http://dx.doi.org/10.1080/23744731.2021.1890520},
  doi          = {10.1080/23744731.2021.1890520},
  year         = {2021},
}