Geothermal energy : settlement and water chemistry in Cork, Ireland

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Title: Geothermal energy : settlement and water chemistry in Cork, Ireland
Authors: Hemmingway, Phil
Long, Michael (Michael M.)
Permanent link: http://hdl.handle.net/10197/3725
Date: Jul-2011
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.
Funding Details: Irish Research Council for Science, Engineering and Technology
Type of material: Journal Article
Publisher: Institution of Engineers
Copyright (published version): 2011 ICE Publishing
Keywords: GeothermalOpen loopChemistryWaterSettlementSite investigation
Subject LCSH: Geothermal resources--Ireland--Cork
Renewable energy sources--Ireland--Cork
Water chemistry
DOI: 10.1680/ensu.1000024
Language: en
Status of Item: Peer reviewed
Appears in Collections:Urban Institute Ireland Research Collection
Biosystems and Food Engineering Research Collection
Civil Engineering Research Collection

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