Low-temperature geothermal potential of the flooded Gaspé Mines, Québec, Canada
- 作者：Jasmin Raymond ; René ; Therrien
- 关键词：Low-temperature geothermal resources ; Mine water ; Heat pump ; Pumping test ; Modelling ; Gaspé ; Mines ; Qué ; bec ; Canada
- 刊名：Geothermics
- 出版年：2008
- 期刊代码：23_03756505
- 类别：pw
- 出版时间：April 2008
- 卷：37
- 期：2
- 页码：189-210
- 文件大小：1274 K
摘要
The low-temperature geothermal potential of the flooded Gaspé Mines, near Murdochville, Québec, Canada, has been estimated from a long-term pumping test and numerical groundwater flow modelling. A former mining shaft was used to pump water for 3 weeks at a rate averaging 0.062 m3/s (3720 L/min). A mean recovery temperature equal to 6.7 °C and a maximum drawdown of 3.63 m were observed during this test. The observed drawdown was reproduced with a three-dimensional finite element model that simulates groundwater flow through the mine workings and surrounding rock mass. The model was then used to simulate longer-term pumping performed for heat recovery. Modelling results combined with a simplified energy balance calculation suggest that a sustainable energy extraction rate is attained at a pumping rate of 0.049 m3/s (2940 L/min), with a corresponding geothermal energy production potential of 765 kW, assuming a return water temperature of 3 °C. This energy could be extracted with heat pumps and used for space heating at the town's industrial park.