Di Donna, A, Cecinato, F, Loveridge, F orcid.org/0000-0002-6688-6305 et al. (1 more author) (2017) Energy performance of diaphragm walls used as heat exchangers. Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, 170 (3). pp. 232-245. ISSN 1353-2618
Abstract
The possibility of equipping diaphragm walls as ground heat exchangers to meet the full or partial heating and cooling demands of overlying or adjacent buildings has been explored in recent years. In this paper, the factors affecting the energy performance of diaphragm walls equipped as heat exchangers are investigated through finite element modelling. The numerical approach employed is first validated using available experimental data and then applied to perform parametric analyses. Parameters considered in the analysis include panel width, the ratio between the wall and excavation depths, heat transfer pipe spacing, concrete cover, heat-carrier fluid velocity, concrete thermal properties and the temperature difference between the air within the excavation and the soil behind the wall. The results indicate that increasing the number of pipes by reducing their spacing is the primary route to increasing energy efficiency in the short term. However, the thermal properties of the wall concrete and the temperature excess within the excavation space are also important, with the latter becoming the most significant in the medium to long term. This confirms the benefits of exploiting the retaining walls installed for railway tunnels and metro stations where additional sources of heat are available.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © ICE Publishing. This is an author produced version of a paper published in the Proceedings of the Institution of Civil Engineers - Geotechnical Engineering, published by ICE Publishing and available at: https://doi.org/10.1680/jgeen.16.00092. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Diaphragm walls & in situ test; Thermal effects; Renewable energy |
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) > Institute for Resilient Infrastructure (Leeds) |
Funding Information: | Funder Grant number Royal Academy of Engineering RF116 |
Depositing User: | Symplectic Publications |
Date Deposited: | 09 Nov 2016 10:45 |
Last Modified: | 30 Jun 2017 14:08 |
Published Version: | https://doi.org/10.1680/jgeen.16.00092 |
Status: | Published |
Publisher: | Thomas Telford (ICE Publishing) |
Identification Number: | 10.1680/jgeen.16.00092 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:107213 |