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Geothermal Energy in Switzerland
Geothermal heat flow density
The geothermal heat flow density (mW/m²) is a measurement
of the heat transmission by unit of time and by
unit of surface area. As shown on the map, the region
of Basel, the region of the Aare estuary, and a
region in eastern Switzerland have especially high
values.
Over the area of Switzerland, the total geothermal
heat flow is slightly above 3 GW, which corresponds
to 28 TWh per year. A sustainable use
of geothermal energy is limited to this value. Furthermore,
questions regarding usage rights arise since heat
extraction occurs across plots of land or political
borders.
The original map has been kindly placed at our
disposal by professeur Ladislaus Rybach, Swiss Federal
Institute of Technology, Zurich.
http://www.energie-atlas.ch/ge-CH.htm
Geothermal Drillholes
The Swiss geothermal mix has two main components:
1) shallow resources utilization (horizontal coils,
borehole heat exchangers/BHE, foundation piles,
groundwater wells;
2) use of deep resources (deep BHEs, aquifers by
singlet or doublet systems, tunnel waters). Heat
pumps (HP) are key components in practically all
utilization schemes. The BHE/HP system is especially
suitable for a country like Switzerland where construction
space is limited and land expensive.
http://www.geothermie.de/egec_geothernet/menu/frameset.htm
>> Swiss Geothermal Update 1995-2000
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Related GENI Resources
Links
EGEC
(European Geothermal Energy Council)
|