Low-enthalpy geothermal energy resources from groundwater in fluvioglacial gravels of buried valleys

被引：28

作者：

Allen, A ^{[1
]}

Milenic, D ^{[1
]}

机构：

[1] Natl Univ Ireland Univ Coll Cork, Dept Geol, Cork, Ireland

来源：

APPLIED ENERGY | 2003年 / 74卷 / 1-2期

关键词：

low enthalpy geothermal energy; buried valleys; 'heat island' effect; groundwater; gravels; space heating/cooling; heat pumps;

D O I：

10.1016/S0306-2619(02)00126-5

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Low-enthalpy geothermal energy can be generated from groundwater in gravels infilling buried valleys formed during the Pleistocene glaciation, when the sea level was significantly lower than at present. Where buried valleys underlie floodplains of present-day rivers, flowing through major cities, a 'heat island' effect can generate slightly enhanced temperatures in shallow groundwater. This groundwater can be utilised for space heating buildings by passing it through a heat pump, and the chilled water then used as a heat exchanger to satisfy cooling requirements of the building. For flow rates of 20 1 s(-1). and a temperature reduction of 8 degreesC in the heat pump, a 672 kW heating resource can be generated, sufficient to heat buildings of 11,000 m(2) floor area. A cooling resource of 336 kW is also available. Potentially, this geothermal resource could be utilised without the 'heat island' effect. Cost of the development is minimal and long-term economic benefits are significant. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：9 / 19

页数：11

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