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

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  • Allen, Alistair
  • Milenic, Dejan

Abstract

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 l s-1, and a temperature reduction of 8 °C in the heat pump, a 672 kW heating resource can be generated, sufficient to heat buildings of 11,000 m2 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.

Suggested Citation

  • Allen, Alistair & Milenic, Dejan, 2003. "Low-enthalpy geothermal energy resources from groundwater in fluvioglacial gravels of buried valleys," Applied Energy, Elsevier, vol. 74(1-2), pages 9-19, January.
    • Handle: RePEc:eee:appene:v:74:y:2003:i:1-2:p:9-19
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    Citations

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    Cited by:

    1. Thomas Hermans & Frédéric Nguyen & Tanguy Robert & Andre Revil, 2014. "Geophysical Methods for Monitoring Temperature Changes in Shallow Low Enthalpy Geothermal Systems," Energies, MDPI, vol. 7(8), pages 1-36, August.
    2. De Schepper, Guillaume & Paulus, Claire & Bolly, Pierre-Yves & Hermans, Thomas & Lesparre, Nolwenn & Robert, Tanguy, 2019. "Assessment of short-term aquifer thermal energy storage for demand-side management perspectives: Experimental and numerical developments," Applied Energy, Elsevier, vol. 242(C), pages 534-546.
    3. Bayer, Peter & Attard, Guillaume & Blum, Philipp & Menberg, Kathrin, 2019. "The geothermal potential of cities," Renewable and Sustainable Energy Reviews, Elsevier, vol. 106(C), pages 17-30.
    4. Zimny, Jacek & Michalak, Piotr & Szczotka, Krzysztof, 2015. "Polish heat pump market between 2000 and 2013: European background, current state and development prospects," Renewable and Sustainable Energy Reviews, Elsevier, vol. 48(C), pages 791-812.

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