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An enhanced geothermal system (EGS) generates geothermal electricity without the need for natural convective hydrothermal resources. Until recently, geothermal power systems have exploited only resources where naturally occurring heat, water, and rock permeability are sufficient to allow energy extraction. However, by far the most geothermal energy within reach of conventional techniques is in dry and impermeable rock. EGS technologies enhance and/or create geothermal resources in this hot dry rock (HDR) through a variety of stimulation methods, including 'hydraulic stimulation'.

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  • Enhanced geothermal system (en)
  • Sistemi geotermici migliorati (it)
  • Геотермальная циркуляционная система (ru)
  • 增強型地熱系統 (zh)
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  • An enhanced geothermal system (EGS) generates geothermal electricity without the need for natural convective hydrothermal resources. Until recently, geothermal power systems have exploited only resources where naturally occurring heat, water, and rock permeability are sufficient to allow energy extraction. However, by far the most geothermal energy within reach of conventional techniques is in dry and impermeable rock. EGS technologies enhance and/or create geothermal resources in this hot dry rock (HDR) through a variety of stimulation methods, including 'hydraulic stimulation'. (en)
  • Геотерма́льная циркуляцио́нная систе́ма (ГЦС) — система для извлечения тепловой энергии из недр Земли с целью её использования для теплоснабжения или производства электроэнергии. От традиционных геотермальных систем отличается тем, что отработанный теплоноситель закачивается обратно под землю. (ru)
  • 增強型地熱系統(英語:Enhanced Geothermal System,EGS)應用於地下水源不足,或是流通性較差的地熱來源,於一端注入冷水並吸收地底的熱量後,由另一端抽出。「增強型地熱系統」(EGS)除了可以擴大地熱能的應用範疇,開發難以直接取出地下水源的場域,並可作為傳統型直接抽出地下水的地熱來源,在營運後期增進產能的方式。 (zh)
  • ʈI Sistemi geotermici migliorati (in inglese Enhanced geothermal systems, in breve EGS) sono sistemi di terza generazione che incrementano il rendimento delle centrali geotermoelettriche nella produzione di energia elettrica a partire da vapore naturale. La tecnica consiste nel pompare acqua attraverso fenditure e porosità naturali delle rocce in corrispondenza di serbatoi o giacimenti geotermici cioè punti della crosta terrestre in cui esistono temperature elevate ad una profondità facilmente accessibile. Oltre a pompare acqua si aumenta anche la permeabilità del suolo con opportuni scavi e perforazioni (a seconda dell'accessibilità, o meno, dell'uomo al fronte dell'opera) attraverso cui viene pompata acqua sotto pressione. In questi siti, in cui già può essere prodotta energia elettrica (it)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/EGS_diagram.svg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Geothermal_energy_methods.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Map_of_64_EGS_sites_around_the_world.png
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