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Technology Status - NET Nowak Energie & Technologie AG

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● Market Opportunities<br />

Market Potential<br />

Like the energy of the sun, the energy within the earth is immense and has a<br />

lifetime measured in billions of years. However, geothermal energy is<br />

accessible in limited areas, and unlike the use of sunlight, tapping into local<br />

sources of the earth’s heat can result in a temporary decrease in the amount<br />

of energy locally available. Even with re-injection of the geothermal fluid, the<br />

heat content of the reservoir gradually declines. The recovery period for a<br />

geothermal resource depends on how it is used. Resources tapped for<br />

electricity generation could provide energy for 50 years or more if properly<br />

managed. Typically, the plant equipment reaches the end of its useful life<br />

before the resource is depleted. Continuous long-term use of geothermal<br />

energy for electricity generation would require the periodic construction of<br />

new plants at new sites, while previously-used reservoirs recover.<br />

About 0.2% of the surface in Europe has “very good suitability” for<br />

geothermal power (Iceland, Azores, Canaries, pre-Apennine belt of Tuscany<br />

and Latium, Aeolian islands, Aegean islands and Western Anatolia). About<br />

2.5% presents “good suitability” (areas on the border of the abovementioned<br />

regions, Massif Central, Rhine Graben, Campidano Graben,<br />

Pannonian Basin and the island of Lesbos). In these areas, several GW of<br />

geothermal power capacity could be installed in the coming decades and<br />

support rising power demand.<br />

The geothermal potential capacity over the next 30 years is more than ten<br />

times the capacity currently installed. The U.S. Geothermal Energy<br />

Association predicts for several world regions the potential capacity for the<br />

next 30 years as 22 GW in Central America, 10 GW in East Africa, 16 GW in<br />

Indonesia, 8 GW in the Philippines and 23 GW in the U.S. World potential<br />

capacity for geothermal power generation is estimated at 85 GW over the<br />

next 30 years, about 10 times current installed capacity.<br />

<strong>Technology</strong> Factors<br />

Geothermal power plants supply more than 10% of the national power in<br />

some countries, in those countries where geothermal resources are<br />

abundant and competitive. In addition to these large-scale, cost competitive<br />

applications, small-scale applications are approaching the cost range where<br />

geothermal can compete for special applications and/or power supply in<br />

remote areas. In these areas, geothermal plants might provide base-load<br />

electricity. Following are areas for market growth:<br />

6<br />

GEOTHERMAL POWER<br />

139

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