Deep geothermal energy

Renewable energies except solar electric or thermal (seeforums dedicated below): wind turbines, energy from the sea, hydraulic and hydroelectricity, biomass, biogas, deep geothermal energy ...
moinsdewatt
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by moinsdewatt » 21/12/14, 13:53

700 MW of new geothermal installations in 2014.
World total to date becomes 12.7 GW.



Gthermal Energy in 2014: 700 MW (megawatts) of new additions

December 18, 2014 evwind

Geothermal power in 2014 witnessed continued growth, more countries developing projects, and an increase in on-line capacity of between 4% and 5% for the third year in a row.

With 700 MW (megawatts) of new additions, the global market reached upwards of 12.7 GW (gigawatts) of geothermal power operational throughout 24 countries.

By comparison the global industry added about 600 MW in 2013.
...........


http://www.evwind.es/2014/12/18/geother ... ions/49523
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by moinsdewatt » 01/10/15, 17:15

Deep geothermal energy: green light for commercial operation of the Soultz site

September 24, 2015 Laurent Radisson actu-environment.com

A decree, published on September 24 in the Official Journal, grants for 25 years the concession of geothermal deposits, known as the “Soultz concession” (Bas-Rhin), to the European economic interest group “Heat mining”. This concession is granted with the aim of exploiting the deep geological resources at high temperature for the production of heat and electricity.


The concession covers an area of ​​23 km2, which is fully within the scope of the exclusive exploration permit renewed by decree on July 16, 2014. It relates to the municipalities of Kutzenhausen, Memmelshoffen, Retschwiller, Schoenenbourg, Soultz- Sous-Forêts, Hoffen, Merckwiller-Péchelbronnn, Surbourg and Betschdorf.

According to the specifications annexed to the decree, the minimum annual gross production commitments are 70.000 megawatt hours (MWh) of heat and 11.000 MWh of electricity over the first ten years. If production falls below these thresholds, for two consecutive years, while the intrinsic productivity of the deposit remains unchanged, the ministry in charge of mines may terminate the concession and reallocate it without compensating the concessionaire.

Experiment launched in 1987

The Soultz site, together with Bouilllante in Guadeloupe, is the two historic French deep geothermal sites. It was the subject of a scientific experiment launched in 1987 and carried by industrialists (Groupe ES, EDF, EnBW, Bestec, etc.) with the support of French (Ademe) and German (BMU) public establishments. "The Soultz-sous-Forêts pilot site has confirmed the very important energy potential of the Alsatian subsoil and has made it possible to envisage an exploitation beyond the framework of scientific research", notes the investigating commissioner in the opinion favorable to the request concession that he handed over in October 2014.

The French Government announced in February 2013 its desire to relaunch high temperature geothermal energy by granting new exclusive research permits. Deep geothermal professionals announced in June 2014 the launch of a turnkey offer and an innovative insurance fund to cover geothermal risk.

http://www.actu-environnement.com/ae/ne ... 25317.php4
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by moinsdewatt » 17/10/15, 13:25

Geothermal energy: the State authorizes a Fonroche project near Strasbourg

AFP 16 Oct 2015

The prefect of Bas-Rhin announced Friday that he had authorized a high-temperature geothermal drilling project at Eckbolsheim west of Strasbourg, which had initially received an unfavorable opinion from the public inquiry.

This project, led by Fonroche Géothermie, had received an unfavorable opinion from the investigating commissioner in August due to its proximity to another project of the Electricité de Strasbourg group (ES, subsidiary of EDF) in Mittelhausbergen (Bas-Rhin), abandoned since .

On the favorable opinion of the Departmental Council for the Environment and Technological Risks (Coderst), "the Prefect of Bas-Rhin (Stéphane Fratacci) decided to authorize the project, by imposing on the operator technical obligations of a nature to be controlled. the risks associated with this activity, "the prefecture said in a statement.

The Council considered that "the provisions provided for by the mining code" were "taken into account by the Fonroche company" and considered that the Mittelhausbergen project having been abandoned, "the main reservation made by the investigating commissioner" had been lifted.

The Eckbolsheim project will be accompanied by technical obligations in order to "prevent the risk of micro-seismicity, to limit and permanently control the fluid injection pressure", specified the prefecture.

"A monitoring network will be installed and work will be stopped without delay as soon as any difficulties arise. Checks will be carried out at all stages of drilling, before continuing operations," she added.

A monitoring commission associating the services of the State, elected officials, Eurometropolis of Strasbourg, associations and operator has been created to provide information to the public "in real time".

Fonroche last year applied for work authorization (DAOT) to carry out four boreholes and production tests in the Bas-Rhin, to assess the characteristics of the high temperature geothermal resource.

To date, the company has given up two of its projects but remains involved in two others, in Eckbolsheim and Vendenheim north of Strasbourg.

High temperature geothermal energy (over 150 degrees) involves taking naturally warm water from a great depth and extracting the heat from it to generate electricity or heat.

Alsace is considered a region with high potential for this source of energy, which the government wants to develop.

At the end of September, the prefect had authorized deep geothermal drilling in the basement of Illkirch-Graffenstaden, on the outskirts of Strasbourg, designed by the ES group, which aims to supply a future district heating network and industrial installations.


http://www.connaissancedesenergies.org/ ... urg-151016
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by moinsdewatt » 07/06/16, 21:19

A deep geothermal power plant inaugurated in Alsace

June 07, 2016

The Minister of the Environment and Energy Ségolène Royal inaugurated the deep geothermal power plant on Tuesday in Rittershoffen north of Strasbourg, a project presented as a world first that will supply steam to a factory of the food group Roquette.

This plant will be responsible for drawing hot water at 165 degrees at 2.600 m deep to supply steam to a factory located 15 km away, that of the Roquette family group specializing in the recovery of vegetable raw materials, in Beinheim.

Coupled with a wood-fired boiler that already equips the site, the Rittershoffen geothermal installation will increase the share of renewable energies in the energy consumption of the Roquette industrial site to 75%, one of the five world leaders in starch processing .

Realized by the group ES (Electricité de Strasbourg), a subsidiary of EDF, the installation releases a power of 24 megawatts, enough to produce the energy that would heat 27.000 homes.

The project represented an investment of 55 million euros.

It consists in drawing the water which is trapped in the characteristic faults in the basement of the Rhine valley. The borehole descends to a depth of 2.600 meters, so as to capture the resource at its required temperature of 165 degrees. The water brought back to the surface goes back into the earth through another well. Previously, it goes through a heat exchanger in the power plant. This takes the calories to heat the water that circulates through a buried pipe to Roquette. Reached the factory at 160 degrees, it operates the production facilities via a steam generator. At the exit, it carries out the opposite path, up to the Rittershoffen reinjection well.

"The Rittershoffen project brings us to strengthen our commitment in all renewable energies", hydraulic, solar, wind, says Jean-Bernard Lévy, CEO of EDF,

According to him, "the technology is now mastered and respectful of the environment, without fracturing" of the basement.

The EDF group already has other projects in Alsace aimed at "replicating the Rittershoffen project, in Wissembourg a few kilometers from here, and Illkirch" near Strasbourg, said Mr. Lévy.

Image


http://www.lalsace.fr/actualite/2016/06 ... -en-alsace

Aerial view in New Factory:

Image

http://www.usinenouvelle.com/article/ec ... en.N395927
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Re: Deep geothermal energy




by lilian07 » 08/06/16, 11:28

Nice initiative, but this factory is only temporary because stocks will eventually run out more or less quickly depending on the characteristics of the surrounding environment, as it is clearly stated in this post. However according to the circumstances, this factory can function more than 50 years and starting from the known technical elements of the construction (wood boiler, reinjection and drawing ...) the investment will certainly be profitable, since our company is very efficient in calculating the more or less immediate profitability of a financial system.

Most of the temperature gradient comes from the radioactive decay of the isotopes of the "soil" medium, this flux is however tiny, between 50 and 250 mW / m2 of soil on average ... insufficient to see the multiplication of factories. of this kind but sufficient to see the temperature gradient rise by 1 ° every 33m of depth. This also suggests that this weak energy flow ends up causing the temperature to rise irreparably to a point of equilibrium and which suggests that the ground isolates this weak flow well, which no longer disappears below 6m to 10m.

The problem with our underground, is that it is unknown is very heterogeneous which makes it a medium little prospect and unprofitable in the current state of the price of fossil fuels.
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Re: Deep geothermal energy




by Did67 » 08/06/16, 18:52

The second photo is the Roquette factory in Beinheim.

The drilling is much more modest! See : http://www.industrie-techno.com/comment ... rmie.14001
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Re: Deep geothermal energy




by moinsdewatt » 08/06/16, 20:35

Did67 wrote:The second photo is the Roquette factory in Beinheim.

The drilling is much more modest! See : http://www.industrie-techno.com/comment ... rmie.14001


Thank you for this precision and insight!
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Re: Deep geothermal energy




by Did67 » 08/06/16, 22:27

Elsewhere, there is a thread that encourages us not to gobble up anything on the internet!

So let's read - same econology - with active neurons ...
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Re: Deep geothermal energy




by chatelot16 » 08/06/16, 23:37

it should not be imagined that deep geothermal energy is possible anywhere or by digging deep enough ... the ground is poor conductor of heat and the thermal flux is weak

real geothermal energy is when natural geology itself makes hot water concentrated in specific places ... iceland ... or in france thermal spring

drilling holes anywhere to search for hot water could be catastrophic: communicating the water table with deeper water salty or other oddity and not even hot

a little humor, deep geothermal energy is for belgians because at the bottom they are not so stupid
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Re: Deep geothermal energy




by Christophe » 09/06/16, 10:51

Yes, the areas are quite limited ... Alsace is a region which is rather favorable to deep geothermal energy but all of Alsace is not concerned.

I visited the pilot drilling at Soultz-sous-foret energies-renewable / geothermal-a-deep-sub-soultz drill-t1871.html in 2003!

It was a pilot unit at the time ... to test the technology, and according to my memories of this visit, the problems encountered were numerous ... at the time at least!

Unfortunately, it is a technology that is fully mastered by oil companies ... therefore with "oil" equipment prices (I think we were talking about 100 € at the time for a milling head). . it takes dozens to dig at 000 m) I think that it will therefore remain and for a long time to come, only marginal ...

ps: yes the geological risk exists, but it is not worse than with shale gas on the contrary ... and oil tankers are used to this kind of risk : Cheesy: nuclear-fossil-energy / non-conventional-schist-toreador-oil-in-idf-t10451.html
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