| Abstract |
Although historical books showed some records of existence of hot spring in Foyukou of Beijing 1,500 years ago, geothermal development started only in the past 50 year. Preliminary geothermal investigation and exploration were carried out in Xiaotangshan hot spring area in 1950s, in order to ensure the construction of local sanatorium. Then there was an attempt to find new geothermal area in 1960s, but was not successful. From the beginning of 1970s, geothermal exploration started in Beijing Urban area accompanying geological and geophysical survey. One year later, artesian geothermal water flowed out from the first group of wells within 1,000 m of depth. Geothermal was utilized in bathing, health care, space heating, greenhouse and fish farming. In 1980s, several new geothermal fields were found relying on analogue geological setting. At that time, reinjection and corrosion tests were carried out. And the management of geothermal resources was also started. In 1990s, along with the restructuring the economy from socialist planned economy to market economy, individual investors emphasized geothermal development in tourism and health aspects. It set off a new upsurge of geothermal development. In the beginning of 21st century, on one hand, some new models in newest design, comprehensive utilization and cascade use have appeared under market competition. On the other hand, total exploitation of geothermal water has been kept stable, but total energy utilization has significantly increased. |