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 ...
bagua
I learn econologic
I learn econologic
posts: 10
Registration: 28/10/09, 20:12

Deep geothermal energy




by bagua » 06/11/09, 17:02

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
0 x
Leo Maximus
Econologue expert
Econologue expert
posts: 2183
Registration: 07/11/06, 13:18
x 124




by Leo Maximus » 06/11/09, 18:25

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.
0 x
moinsdewatt
Econologue expert
Econologue expert
posts: 5111
Registration: 28/09/09, 17:35
Location: Isére
x 554

Re: Deep geothermal energy




by moinsdewatt » 11/03/12, 12:38

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
0 x
moinsdewatt
Econologue expert
Econologue expert
posts: 5111
Registration: 28/09/09, 17:35
Location: Isére
x 554

Re: Deep geothermal energy




by moinsdewatt » 11/03/12, 12:39

Hellisheiði geothermal power station (Iceland)

second largest geothermal power plant in the world, and the largest in the country.

Image

http://fr.wikipedia.org/wiki/Centrale_g ... hei%C3%B0i

Other photos here: http://www.mannvit.com/GeothermalEnergy ... toGallery/?

Image
0 x
moinsdewatt
Econologue expert
Econologue expert
posts: 5111
Registration: 28/09/09, 17:35
Location: Isére
x 554

Re: Deep geothermal energy




by moinsdewatt » 11/03/12, 12:39

Image

source: http://fr.wikipedia.org/wiki/Liste_des_ ... othermique

Edit modo: please put the image on our image host
0 x
User avatar
chatelot16
Econologue expert
Econologue expert
posts: 6960
Registration: 11/11/07, 17:33
Location: Angouleme
x 264




by chatelot16 » 11/03/12, 15:49

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
0 x
dedeleco
Econologue expert
Econologue expert
posts: 9211
Registration: 16/01/10, 01:19
x 10




by dedeleco » 11/03/12, 21:17

it takes good geologist to find where it is possible

and especially a rather close volcano not too old (massive central already 6000 years).
0 x
moinsdewatt
Econologue expert
Econologue expert
posts: 5111
Registration: 28/09/09, 17:35
Location: Isére
x 554




by moinsdewatt » 16/03/12, 12:16

dedeleco wrote:
it takes good geologist to find where it is possible

and especially a rather close volcano not too old (massive central already 6000 years).


Not necessarily !

Image
0 x
dedeleco
Econologue expert
Econologue expert
posts: 9211
Registration: 16/01/10, 01:19
x 10




by dedeleco » 16/03/12, 15:42

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 !!
Last edited by dedeleco the 17 / 03 / 12, 14: 01, 1 edited once.
0 x
moinsdewatt
Econologue expert
Econologue expert
posts: 5111
Registration: 28/09/09, 17:35
Location: Isére
x 554




by moinsdewatt » 17/03/12, 12:12

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.

Image

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.

Image

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
0 x

 


  • Similar topics
    Replies
    views
    Last message

Back to "hydraulic, wind, geothermal, marine energy, biogas ..."

Who is online ?

Users browsing this forum : No registered users and 264 guests