So here is my first contribution outside the nuclear
I think it's a really interesting choice
It has nothing to do with current techniques: heat sinks therefore exploitable resource limit in number
1-the earth's crust is composed largely of granite so this process is practically possible everywhere
2-The temperature increases on average by 3 ° C for 100 m of depth so it is about 250 ° C for 10 km temperature and sufficient pressure for the production of electricity
http://www.pointsdactu.org/article.php3?id_article=1304
this link is a study us (MIT) there are maps that show the approximate underground temperature for several depths in the united states
http://geothermal.inel.gov/publications ... energy.pdf
There is, however, a risk of causing earthquakes by injecting the water under pressure, as it happens when water is injected into a fault, the water becomes a lubricant and facilitates the movement of the rocks, but it also means anticipate much stronger earthquakes
correct me if im wrong
Deep geothermal energy
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The subject is very interesting and has been treated here several times:
energies-renewable / la-geothermie-en-Swiss-an-example-toward-France-t8123.html
energies-renewable / geothermal-a-deep-sub-soultz drill-t1871.html
energies-renewable / geothermal project-deep-in-soutz-sous-drill t3726.html
Etc. ..
The problem is that a facility like Soultz under Forests is 1 MW, it's not great considering the costs.
energies-renewable / la-geothermie-en-Swiss-an-example-toward-France-t8123.html
energies-renewable / geothermal-a-deep-sub-soultz drill-t1871.html
energies-renewable / geothermal project-deep-in-soutz-sous-drill t3726.html
Etc. ..
The problem is that a facility like Soultz under Forests is 1 MW, it's not great considering the costs.
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Re: Deep geothermal energy
GDF Suez: 2 new geothermal projects of 220 MW in Indonesia
One of Indonesia's leading independent power producers, IPR-GDF SUEZ Asia, announces it has signed 2 Power Purchase Agreements (PPAs) with a term of 30 years for two 220 MW geothermal projects, with PLN , the Indonesian utility company.
The Ministry of Finance of the Republic of Indonesia has issued a government guarantee letter for the two projects, dubbed Muara Laboh and Rajabasa, thus covering PLN's obligations under these contracts.
The two projects also sponsored by PT Supreme Energy and Sumitomo Corporation are expected to be built on the island of Sumatra. They will supply electricity to this region, which is experiencing strong growth in energy demand.
These two projects are included in the second accelerated energy program of the Indonesian government, of which nearly 4 500 MW will have to be of geothermal origin.
Signature of PPPs is a necessary prerequisite for commencing drilling for the exploration of geothermal resources. After confirming the presence of these resources, the parties will negotiate the project financing agreements as well as those relating to engineering, supply and construction (EPC).
Subject to the time required to complete these steps, the commissioning of these projects is planned in 2016.
IPR-GDF SUEZ Asia, which holds a 35% stake in these projects, has a gross capacity of 1 280 MW of operating assets and 815 MW of assets under construction. Last year, it also entered into a joint venture agreement with Marubeni Corporation and PT Supreme Energy to develop another geothermal project for 220 MW. Called Rantau Dedap, this project is located in the South of Sumatra province.
http://www.enerzine.com/4/13593+gdf-sue ... esie+.html
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Re: Deep geothermal energy
Hellisheiði geothermal power station (Iceland)
second largest geothermal power plant in the world, and the largest in the country.
http://fr.wikipedia.org/wiki/Centrale_g ... hei%C3%B0i
Other photos here: http://www.mannvit.com/GeothermalEnergy ... toGallery/?
second largest geothermal power plant in the world, and the largest in the country.
http://fr.wikipedia.org/wiki/Centrale_g ... hei%C3%B0i
Other photos here: http://www.mannvit.com/GeothermalEnergy ... toGallery/?
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Re: Deep geothermal energy
source: http://fr.wikipedia.org/wiki/Liste_des_ ... othermique
Edit modo: please put the image on our image host
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- chatelot16
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when nature has already built the steam boiler, as in iceland it's easy ... and it does not hesitate to exploit it
but anywhere in France ... digging a hole in hot, dry rock ... poor heat conductor: low power recovered for very expensive deep drilling
send water where there is none? it can be play witch aprentis
do not believe that deep geothermal is available anywhere: it takes good geologist to find where it is possible
there are already a number of hot springs in France: there are certainly hot water tables that could be explored in large: less dangerous than digging anywhere
but anywhere in France ... digging a hole in hot, dry rock ... poor heat conductor: low power recovered for very expensive deep drilling
send water where there is none? it can be play witch aprentis
do not believe that deep geothermal is available anywhere: it takes good geologist to find where it is possible
there are already a number of hot springs in France: there are certainly hot water tables that could be explored in large: less dangerous than digging anywhere
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They forget to talk about the risk of progressive cooling of the geological layers (hot water tank without volcano to warm up where cold water is returned) on 10, at 30 years, which has already happened to some around the Paris region and therefore good for a duration depending on the size of the reservoir (complete chance), water circulation, often low, and the number of geothermal drilling on it.
Geothermal energy is good if you warm up the water in summer by injecting heated water in summer by a hot spring, like junk incinerator (made in Paris region) or solar collectors (which then do not need deep geothermal energy, just about 10m to 30m max, like a www.dlsc.ca ) or too much hot water from nuclear or thermal power plants !!
So it becomes perpetual, consuming nothing, polluting nothing, neither nuclear, nor CO2, nor particles, nor NO, and it is not necessary to do it very deep more, since we warm up the summer to Winter !!
Geothermal energy is good if you warm up the water in summer by injecting heated water in summer by a hot spring, like junk incinerator (made in Paris region) or solar collectors (which then do not need deep geothermal energy, just about 10m to 30m max, like a www.dlsc.ca ) or too much hot water from nuclear or thermal power plants !!
So it becomes perpetual, consuming nothing, polluting nothing, neither nuclear, nor CO2, nor particles, nor NO, and it is not necessary to do it very deep more, since we warm up the summer to Winter !!
Last edited by dedeleco the 17 / 03 / 12, 14: 01, 1 edited once.
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Deep geothermal Val Maubuée, drilling began
Early February 2011, drilling at a 2 depth 100 meters began in the Val Maubuée (77) agglomeration to set up the new geothermal installation that will supply its urban heat network.
Faced with the constant rise in prices of fossil fuels and driven by the desire to develop renewable energies, the elected officials of Val Maubuée wanted to develop geothermal energy. In 2009, they entrusted the management of the network and geothermal power plant to Géoval. This collective network, developed by the agglomeration the second most populated area of Marne-la-Vallée serves 4 964 equivalent housing in the municipalities of Lognes and Torcy since the 80 years.
"Drilling work on the first of the two geothermal wells is now on the verge of completion," said Géoval, a subsidiary of Dalkia, in a press release. The drilling of the second well will start in the next few days and will be completed in June.
While the new plant will supply heating and hot water to the connected buildings, 85% of energy needs will be provided by the development of geothermal energy, replacing the gas that previously supplied the grid. The annual volume of CO2 emissions thus saved by geothermal energy at Val Maubuée will be more than 9 000 tonnes. Moreover, the subscribers of the district heating network will benefit from a consequent reduction of the rate of their heating bill up to 30% according to the powers subscribed.
The cost of all the works is 15,37 million euros, financed by Géoval. Ademe, the Regional Council of Ile-de-France through the Heat Fund, and the ERDF (European Regional Development Fund) financially support this project up to 2,95 million euros.
Already operating 16 29 geothermal facilities operating in Ile-de-France, Dalkia indicates that this operation is the first geothermal deep for the group since 20 years. He also states that 10 new projects should see the day from here 2014.
http://www.enerzine.com/4/11668+geother ... bute+.html
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