Research article
16 February 2010

Numerical groundwater flow and heat transport modelling of open-loop ground source heat systems in the London Chalk

Author: M. Gropius
Publication: Quarterly Journal of Engineering Geology and Hydrogeology
Volume 43
Pages 23 - 32

Abstract

The Greater London Authority's planning requirement for 10% of building energy to be obtained from renewable sources has led to extensive development of open-loop ground source heat systems in central London. Such systems are used for building heating and cooling with varying energy loads and balances over an annual cycle. Numerical groundwater flow and heat transport modelling is an essential tool for predicting the hydraulic and thermal impacts of proposed open-loop ground source heat schemes on existing licensed abstractions, other open-loop ground source heat systems, or other potential receptors, such as surface water ecosystems. Numerical models can be used to predict whether thermal interference is likely to reduce the efficiency of a system over time, and can be used to investigate possible alternative solutions. This paper focuses on the role of numerical heat transport modelling in the London Chalk aquifer. Conceptual models and numerical modelling strategies for the fractured Chalk aquifer are discussed. Case studies are presented and the results are discussed in relation to improvement of numerical modelling results and reliability of numerical model predictions on sustainable long-term ground source heat scheme performance, and assessment of their impact on other groundwater users.

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cover image Quarterly Journal of Engineering Geology and Hydrogeology
Quarterly Journal of Engineering Geology and Hydrogeology
Volume 43Number 1February 2010
Pages: 23 - 32

History

Received: 28 October 2008
Accepted: 12 June 2009
Published: February 2010
Published online: 16 February 2010

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M. Gropius
Zenith International, Bath BA1 2AB, UK
Present address: Kopenhagener Str. 57, 10437 Berlin, Germany

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