举个例子,哈瓦那人地热试验工厂][1]研究在澳大利亚从2003年到2013年。它作为一个[1兆瓦核电站][2]的库珀盆地,在澳大利亚的中部地区。The heat source rock, with a temperature of 264 °C was in excess of 4600 m depth. The project cost AUD 105 million and was ultimately deemed uneconomic. The project involved drilling a number of holes to approximately 4600 m depth, injecting some with vast quantities of water and then collecting the steam generated via another set of holes drilled to 4600 m depth and using the steam to power a turbine to generate electricity. The problems with the project were: - The depth of drilling required - it was deep and expensive. - Acquisition of sufficient supplies of water in a arid location. - The site location was too remote from locations that might have been able to use any generated electricity. The establishment of electricity transmission lines would have been very expensive. - Having to deal with unfavorable geology, such as fracture zones at shallower depths where the injected water would be lost. In the picture below, the red areas are the only parts of Australia which has hot rocks to a depth of 5 km that could provide geothermal energy. The area is very small compared to the rest of the continent. Some rocks are deeper. [![enter image description here][3]][3] [1]: https://www.geothermal-energy.org/pdf/IGAstandard/NZGW/2013/Mills_Final.pdf [2]: https://reneweconomy.com.au/geodynamics-writes-cooper-basin-geothermal-assets-40047/ [3]: https://i.stack.imgur.com/wZKQy.png