Loveridge, FA orcid.org/0000-0002-6688-6305 and Cecinato, F (2016) Thermal performance of thermoactive continuous flight auger piles. Environmental Geotechnics, 3 (4). pp. 265-279.
Abstract
Foundation piles are being increasingly equipped with heat exchangers to efficiently harvest shallow geothermal energy. For buildings in urban areas, continuous flight auger (CFA) piles are common owing to their speed, cost-efficiency and low noise levels. To construct a thermoactive CFA pile usually requires separate central installation of the heat exchanger. However, the energy performance of this type of pile has not been investigated systematically, with most studies focused on rotary piles where the heat exchanger is attached to the reinforcing cage. In this work, insights are provided about the main influences on the energy efficiency of thermoactive CFA piles, with a focus on the implications of using CFA construction techniques rather than rotary boring. An innovative three-dimensional numerical model, able to capture the different aspects of transient heat transfer, is employed together with analytical methods to evaluate the transient and steady-state behaviour of energy piles in a number of design situations. Attention is given to understanding the role of possible pipe-to-pipe interaction, which cannot be systematically investigated with standard methods. Finally, practical guidelines on the optimal choice of design parameters to maximise the energy efficiency of CFA piles, without altering the geotechnical arrangements, are provided.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © ICE Publishing, all rights reserved. This is an author produced version of a paper published in Environmental Geotechnics. Uploaded in accordance with the publisher's self-archiving policy. |
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) |
Depositing User: | Symplectic Publications |
Date Deposited: | 16 Aug 2016 15:07 |
Last Modified: | 16 Jan 2018 16:13 |
Published Version: | http://dx.doi.org/10.1680/jenge.15.00023 |
Status: | Published |
Publisher: | ICE Publishing |
Identification Number: | 10.1680/jenge.15.00023 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:103496 |