The Status of Geothermal Resource Development in Ireland

Since 2003 the CSA Group Ltd. have carried out surveys of geothermal resources across the island of Ireland. Data were gathered and geothermal models developed, a GISlinked geothermal database produced and a series of geothermal maps for different depths created. The status and utilisation of geothermal energy resources was reviewed and exploitation of geothermal resources was recommended. The studies on warm springs and groundwater temperature trends found that the warmest values are in the south and east. Ireland is well suited for ground source heat pumps utilization, due to its temperate climate and rainfall levels that ensure good conductivity and year round recharge. Subsurface temperature data were compiled from 81 boreholes up to 2,500m deep. These reviews of the Republic of Ireland and Northern Ireland, indicate a regional increase in temperatures at 500m depth from 18oC in the south to 30oC in the north. At 1,000m depth from 20¨C to 60¨C. At 2,500m from 30oC to 95oC to the north. At 5km depth they vary from 60oC in the south to 150oC in the north. These results indicate significant geothermal resources with the potential for commercial development. The reports can be viewed at www.csa.ie.