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Book Chapter

Waste heat problems and solutions in geothermal energy

By
Ladislaus Rybach
Ladislaus Rybach
GEOWATT AG, Zürich, SwitzerlandInstitute of Geophysics, ETH Hönggerberg, Zürich, Switzerland
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Thomas Kohl
Thomas Kohl
GEOWATT AG, Zürich, SwitzerlandInstitute of Geophysics, ETH Hönggerberg, Zürich, Switzerland
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Published:
January 01, 2004

Abstract

All heat-power conversion systems produce waste heat, which can attain significant portions. This applies to geothermal power generation too; the waste heat fraction depends on the conversion technology. The more of the waste heat that can be utilized for some useful purpose (and consequently requiring less heat to be rejected), the better economy can be achieved, besides benign environmental effects. The best solution to avoid discharge to the atmosphere or to the hydrosphere is cascaded use. This consist of a chain of applications with stepwise decreasing temperatures, for example, from industrial uses through balneology down to fish farming. Constraints given by environmental legislation can lead to beneficiary solutions like in the case of warm tunnel waters in the Swiss Alps: these would need cooling ponds/towers before being permissible for discharge into local rivers. It is described by several specific examples how the tunnel waters can be used instead.

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Contents

Geological Society, London, Special Publications

Energy, Waste and the Environment: a Geochemical Perspective

R. Gieré
R. Gieré
Universität Freiburg, Germany
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P. Stille
P. Stille
ULP-École et Observatoire des Sciences de la Terre-CNRS, Strasbourg, France
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Geological Society of London
Volume
236
ISBN electronic:
9781862394841
Publication date:
January 01, 2004

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