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==Overview== Geothermal energy exploitation in China started c. 1970. In the socialist planned economy geothermal exploration was handled by national bodies with public investments. Drilled productive wells were transferred free of charge to the final user. Since the mid-1980s, under the framework of privatization and liberalization of the economy, national investment in exploration has been reduced. No new plants have been commissioned in the period 2000–2005 (Zheng et al., 2005; Battocletti et al., 2000). The only electricity-producing fields are located in Tibet. According to the "2005 Chinese Geothermal Environment Bulletin" by China's Ministry of Land and Resources, the direct utilization of geothermal energy in China will reach 13.76 cubic meters per second, and the geothermal energy will reach 10,779 megawatts, ranking first in the world (). However such programme has not been started so far. The most important field is Yangbajain Geothermal Field, with eight double flash units for a total capacity of 24 MW, fueled from a water dominated shallow reservoir at 140 °C – 160 °C with 18 wells of average depth 200 m. The field extension is only 4 km2, although there are clear indications of a total thermal anomaly of 15 km2. The annual energy production is approximately 100 GW·h, about 30% of the needs of the Tibetan capital, Lhasa. A deep reservoir has been discovered beneath the shallow Yangbajing field. It is characterized by high temperatures (250–330 °C has been measured at 1,500–1,800 m depth). The field potential is estimated at about 50–90 MW. It is still un-exploited. A 2,500 m deep well has been drilled in 2004, reaching the deep reservoir at 1,000–1,300 m. Its evaluation is ongoing. Additional plants are installed in Langju, West Tibet (two double flash unit, 1 MW each, 80–180 °C) and a 1 MW binary power station (60–170 °C) is operating in Nagqu. Two small 300 kW plants are operating in Guangdong and Hunan. Taken from Ruggero Bertani's paper, " World Geothermal Generation 2001-2005: State of the Art", published in Proceedings of the World Geothermal Congress 2005, Antalya, Turkey, 24–29 April 2005. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Geothermal power in China」の詳細全文を読む スポンサード リンク
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