Terrestrial Heat Worldwide

World-wide the terrestrial heat use rises continuously, both the heat production and the electricity production. The kind of production depends on the geological situation.

Weltweit steigt die Erdwärmenutzung kontinuierlich an, sowohl bei der Wärmeerzeugung als auch bei der Stromproduktion. Dabei ist die Art der Produktion von der geologischen Situation abhängig.
For the year 2006, totally 9 ' 000 MW of electrical achievement for the electricity production are installed and in 71 countries 28 ' 000 MW of thermal achievement for heat productionin are installed.

Over 99% of the earth is hotter than 1 ' 000° C, only one thousandth of the earth mass and just the upper 3km directly under the earth-crust is cooler than 100° C. The temperature in a depth of 10 - 20 meters in central euope is about 12° C. Above this depth temperature is affected by the climate. In deeper layers, geothermal regularities are taking place, i.e. the temperature raises approx. about 1° C every 33 meters. World-wide the use of geothermal energy increases rapidly.

In the year 2005 the installed achievement for heat production reached approximately 28 ' 000 MW. With the production of electricity an upswing can be determined, which leds to the today's value of 8 ' 900 MW. At present, plants areunder construction in ten countries, which will produce shortly altogether over 500 MW; until 2010 they will exceed a value of 10 ' 000 MW.

The USA and the Philippines have, with installed achievements of approximately 2 ' 000 MW each, a leading role of all countries achieving electricity with terrestrial heat, followed by Mexico and Indonesia, before Italy, the european leading country with about 700 MW.

International Overview of the Geothermal-Usage
for Electricity production 2005
(Source: Bertani 2006)

Leading Countries	installed achievement (MWel)	electricity- production (GWh/a)
USA	2'564	17'917
Philippines	1'930	9'253
Mexiko	953	6'282
Indonesia	797	6'085
Italy	791	5'340
Japan	535	3'467
NewZealand	435	2'774
Iceland	202	1'406
Costa Rica	163	1'145
El Salvador	151	967
Kenia	129	1'088
Others	283	1'062
Total	8'933	56'786

International Overview of the Geothermal-Usage
for Heat production in 2005
(Source: Lund et al. 2005)

Leading Countries	Installed Achievement (MWth)	Heat- production (GWh/a)
USA	7'817	8'678
Sweden	3'840	10'001
China	3'687	12'605
Iceland	1'791	6'615
Türky	1'177	5'451
Danemark	821	1'211
Hungary	694	2'206
Italy	607	2'099
Switzerland	582	1'175
Germany	505	808
Canada	461	707
Norway	450	643
Others	5'393	20'423
Total	27'825	72'622

Geothermal Plant in Iceland

Terrestrial Heat Worldwide

International Overview of the Geothermal-Usage for Electricity production 2005 (Source: Bertani 2006)

International Overview of the Geothermal-Usage for Heat production in 2005 (Source: Lund et al. 2005)

International Overview of the Geothermal-Usage
for Electricity production 2005
(Source: Bertani 2006)

International Overview of the Geothermal-Usage
for Heat production in 2005
(Source: Lund et al. 2005)