Technologies in use include dry steam power stations, flash steam power stations and binary cycle power stations. As of 2015, worldwide geothermal power capacity amounts to 12. International markets grew at an average annual rate of 5 percent over the last flash steam recovery system pdf years and global geothermal power capacity is expected to reach 14.
5 percent of that of conventional coal-fired plants. In the 20th century, demand for electricity led to the consideration of geothermal power as a generating source. It successfully lit four light bulbs. Later, in 1911, the world’s first commercial geothermal power station was built there. California, in the 1920s, but Italy was the world’s only industrial producer of geothermal electricity until 1958. Wairakei was the first station to use flash steam technology. United States at The Geysers in California.
This technology allows the use of much lower temperature resources than were previously recoverable. Geothermal electric stations have until recently been built exclusively where high temperature geothermal resources are available near the surface. Switzerland was shut down after it triggered earthquakes. Exhaust heat is wasted, unless it can be used directly and locally, for example in greenhouses, timber mills, and district heating.