Shafagh, I, Rees, S orcid.org/0000-0003-4869-1632, Mardaras, IU et al. (2 more authors) (2020) A Model of a Diaphragm Wall Ground Heat Exchanger. Energies, 13 (2). 300. ISSN 1996-1073
Abstract
Ground thermal energy is a sustainable source that can substantially reduce our dependency on conventional fuels for heating and cooling of buildings. To exploit this source, foundation sub-structures with embedded heat exchanger pipes are employed. Diaphragm wall heat exchangers are one such form of ground heat exchangers, where part of the wall is exposed to the basement area of the building on one side, while the other side and the further depth of the wall face the surrounding ground. To assess the thermal performance of diaphragm wall heat exchangers, a model that takes the wall geometry and boundary conditions at the pipe, basement, and ground surfaces into account is required. This paper describes the development of such a model using a weighting factor approach, known as Dynamic Thermal Networks (DTN), that allows representation of the three-dimensional geometry, required boundary conditions, and heterogeneous material properties. The model is validated using data from an extended series of thermal response test measurements at two full-scale diaphragm wall heat exchanger installations in Barcelona, Spain. Validation studies are presented in terms of comparisons between the predicted and measured fluid temperatures and heat transfer rates. The model was found to predict the dynamics of thermal response over a range of operating conditions with good accuracy and using very modest computational resources.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | geothermal; ground heat exchanger; diaphragm wall; screen wall; model validation |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Funding Information: | Funder Grant number EU - European Union 656889 |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Jan 2020 12:43 |
Last Modified: | 25 Jun 2023 22:06 |
Published Version: | https://www.mdpi.com/1996-1073/13/2/300 |
Status: | Published |
Publisher: | MDPI |
Identification Number: | 10.3390/en13020300 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:155432 |