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We found this useful and interesting video on geothermal energy from hot bedrock and wanted to share it with you today. This gives a very nice education on how geothermal energy is harvested from below.
Deep Heat from Per Byhring on Vimeo.
In some places, like Iceland and Tuscany in Italy, hot groundwater can be used directly to make electricity or district heating.
But even in Norway, radioactive elements heat the rock from within. If you could descend in an elevator, you would feel the heat rise around 25 degrees Celsius per kilometre down.
At a depth of five kilometres, the temperature can be over one hundred degrees, some places more.
Drilling at these depths is costly and demanding. Thanks to Norway´s offshore activities, the country has the technology and know how that is needed.
