Geothermal energy: settlement and water chemistry in Cork, Ireland

Author:

Hemmingway Phil1,Long Mike2

Affiliation:

1. PhD Candidate, School of Architecture, Landscape and Civil Engineering, University College DublinDublinIreland

2. Senior Lecturer, School of Architecture, Landscape and Civil Engineering, University College DublinDublinIreland

Abstract

Detailed analysis of potential water chemistry and settlement issues associated with the installation of open-loop geothermal systems is infrequently carried out. This has led to the failure of several previously installed systems. Chemical analysis of water extracted from beneath the Cork docklands, Ireland has been performed by the authors in order to assess the suitability of the area for the exploitation of open-loop geothermal energy. The possibility of settlement induced by pumping of groundwater for open-loop systems has also been examined. Current market penetration of ground source heat pumps in Ireland is discussed to illustrate the infancy of the technology in Ireland relative to other European countries and to highlight the necessity of approaching the possible installation of such systems with the care required. Water extracted from beneath the docklands shows that significant water chemistry issues exist. Laboratory and field tests confirm that optimal concentration levels of several water chemistry characteristics are significantly exceeded; leading to the conclusion that open-loop exploitation in the area may not be suitable. In addition, settlement induced by pumping of water could potentially lead to a consolidation settlement in excess of 30 mm due primarily to the existence of highly compressible alluvium.

Publisher

Thomas Telford Ltd.

Subject

Civil and Structural Engineering

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

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3. A preliminary study of the effect of groundwater flow on the thermal front created by borehole heat exchangers;International Journal of Low-Carbon Technologies;2012-12-21

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