Geophysical Concepts, Applications and Limitations

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2.5 Geothermal energy use for seasonal storage

Slide 34

Use of geothermal energy

Lindal-Diagram

Geothermal use depend

on the temperature of the

geothermal reservoir

Slide 35

3. Use of geothermal energy

3.1 Direct use

http://geothermal.marin.org/GEOpresentation/sld072.htm

Slide 36

3. Use of geothermal energy

3.2 Heating and cooling

http://geothermal.marin.org/GEOpresentation/sld089.htm

Slide 37

3. Use of geothermal energy

3.3 Electric power generation

http://geothermal.marin.org/GEOpresentation/sld036.htm

Carnot thermodynamic efficiency

η = W/Qtherm= 1 - Tcold/Thot

Slide 38

Economic and regulatory aspects for the use of geothermal energy in Germany

http://www.uni-kassel.de/fb14/geohydraulik/Lehre/Geophysik_Geothermie/Vortraege_2007/

Angebotspotential_Schmidmeier.ppt

Slide 39

Ecological aspects of geothermal energy

5.1 Energy potential of a geothermal reservoir

(meaning it is basically a regenerative energy source)

5.2 Regeneration of a geothermal reservoir (sustainability)

5.2.1 Regeneration in a fissured rock system with convective heat

transport

5.2.2 Pure heat conduction in a solid rock system

(requires complicated numerical modeling of the flow and heat

transport in a reservoir)

Slide 40

Risks of the use of geothermal energy

6.1 Risks of seismic events

http://www.uni-kassel.de/fb14/geohydraulik/Lehre/

Geophysik_Geothermie/Vortraege_2009/

Boos_Basel_Projekt.ppt

6.2 Risks at buildings due to vertical deformations

of the earth’s surface or from drilling

http://www.uni-kassel.de/fb14/geohydraulik/Lehre/

Geophysik_Geothermie/Vortraege_2009/

Seeliger_Staufen_Projekt.ppt

6.3 Economic risks

http://www.uni-kassel.de/fb14/geohydraulik/Lehre/Geophysik_Geothermie/

Vortraege_2007/Angebotspotential_Schmidmeier.ppt

Basel

Staufen

Aachen

Slide 41

Potential of geothermal energy for Germany

Geothermal temperatures underneath Germany at depths of 1000m and 2000m

Slide 42

7. Potential of geothermal energy for Germany