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Proceedings of the International Conference on NATIONAL DEVELOPMENT OF GEOTHERMAL ENERGY USE and International Course/EGEC Busiess Seminar on ORGANIZATION OF SUCCESSFUL DEVELEOPMENT OF A GEOTHERMAL PROJECT, K. Popovski, A.Vranovska, S. Popovska Vasilevska, Editors above 450°C could yield enough high- enthalpy steam to generate 40-50 MW of electric power. This exceeds by an order of magnitude the power typically obtained from conventional geothermal wells. This would mean that much more energy could be obtained from presently exploited high- temperature geothermal fields from a smaller number of wells. CONCLUSION Geothermal energy is a renewable en- ergy source that has been utilised econo- mically in many parts of the world for decades. A great potential for an extensive increase in worldwide geothermal utilisa- tion has been proven. This is a reliable energy source which serves both direct use applications and electricity generation. Geothermal energy is independent of weather conditions and has an inherent storage capability which makes it especi- ally suitable for supplying base load power in an economical way, and can thus serve as a partner with energy sources which are only available intermittently. The rene- wable energy sources can contribute sig- nificantly to the mitigation of climate change and more so by working as part- ners rather than competing with each other. Presently, the geothermal utilisation sector growing most rapidly is heat pump appli-cations. This development is expected to continue in the future making heat pumps the major direct utilisation sector. The main reason for this is that geothermal heat pumps can be installed economically all over the world. One of the strongest arguments for putting more emphasis on the development of geo-thermal resources worldwide is the limited environmental impact compared to most other energy sources. The geothermal exploitation techniques are being rapidly developed and the under- standing of the reservoirs has improved considerably over the past years. Com- bined heat and power plants are gaining increased popularity, improving the overall efficiency of the geothermal utilisation. Also, low-temperature power generation with binary plants has opened up the pos- sibilities of producing electricity in coun- tries which do not have high-temperature fields. Enhanced Geothermal Systems (EGS) technologies, where heat is ex- tracted from deeper parts of the reservoir than conventional systems, are under development. If EGS can be proven eco- nomical at commercial scales, the deve- lopment potential of geothermal energy will be limitless in many countries of the world. A project for drilling down to 5 km into a reservoir with supercritical hydrous fluids at 450-600°C is under preparation (IDDP). If this project succeeds, the power obtained from conventional geothermal fields can be increased by an order of magnitude. This would mean that much more energy could be obtained from presently producing high-temperature geo- thermal fields from a smaller number of wells. REFERENCES Baumgärtner J., Menzel, H., Hauffe, P., 2007: The geox GmbH Project in Landau. The First Geothermal Power Project in Palati- nate / Upper Rhine Valley, at First Euro- pean Geothermal Review, Geothermal Energy for Electric Power Production, Mainz, Germany. Beardsmore, G., 2007. The burgeoning Aus- tralian geothermal industry. Geo-Heat Center Bull. 28/3, 20-26. Bertani, R., 2003. What is Geothermal Potential? IGA News, 53, 1-3. Bertani, R., 2005: World geothermal power generation in the period 2001-2005. Geothermics, 34, 651-690. Bertani, R., 2007: World geothermal power generation in 2007. Proceedings of the Eu- ropean Geothermal Congress 2007, Un- terhaching, Germany, 30 May – 1 June 2007. Cataldi, R., 1999: Geothermal energy deve- lopment in Europe to year 2020: prospects or hopes? Technica Poszukiwan Geologic- zncyhc, 4-5, 48-59. 16PDF Image | GEOTHERMAL ENERGY: AN OVERVIEW ON RESOURCES AND POTENTIAL
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