Deep geothermal energy

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sicetaitsimple
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Re: Deep geothermal energy




by sicetaitsimple » 08/12/20, 10:54

Further to the Lessdewatt 22:04:2017 post above. Not easy, deep geothermal energy.


« Definitive stop ”of the geothermal power plant project in Strasbourg, after a series of earthquakes
"This project, located in an urbanized area, no longer offers the essential security guarantees and must therefore be stopped", argued the Bas-Rhin prefecture.

It was to be one of the emblematic projects of geothermal energy in France, but the plant built north of Strasbourg will not see the light of day, condemned Monday, December 7 by a prefectural decree after a series of earthquakes that sowed turmoil in the region. Alsatian metropolis. "This project, located in an urbanized area, no longer offers the essential security guarantees and must therefore be stopped", argued the Bas-Rhin prefecture.

With this decision, the local authorities aim to "avoid as much as possible any new seismic movement", while several "induced" earthquakes, that is to say linked to human activity, have been recorded since the end of October in the perimeter of the geothermal power plant developed by the Fonroche company in the municipalities of Reichstett and Vendenheim, north of the Strasbourg metropolitan area.


https://www.lemonde.fr/planete/article/ ... _3244.html
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izentrop
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Re: Deep geothermal energy




by izentrop » 01/03/22, 11:17

Once again, let's hope this will exceed the announcement effect...
A new technology to access almost unlimited ultra-deep geothermal energy
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Based on fusion research and well-established drilling practices, Quaise Energy has developed a radical new approach to ultra-deep or supercritical drilling. Instead of drill bits that wear out or even melt, they drill with microwaves. First, they use conventional rotary drilling to access bedrock. Then they use high power millimeter waves to reach great depths. These waves are fed by a gyrotron (in a simple way, an electron tube generating waves), purged under pressure with argon gas. The microwave beam is hot enough to evaporate the rock. This vaporized rock is pumped to the surface. Meanwhile, the heat vitrifies the side of the hole, essentially turning it into a glass pipe. At these depths, Quaise expects to find temperatures of around 500 degrees Celsius, well beyond the point where geothermal energy takes a leap forward in efficiency.

Compared to other renewable energies, geothermal energy has advantages from the point of view of land use, materials, metals, minerals and labour. It requires no fuel and produces no waste. Once developed, it will be quick to set up, anywhere on the globe, due to the easily accessible depths. Harnessing just 0,1% of the globe's internal heat, via geothermal energy, could meet the world's energy needs for more than 20 million years, according to Paul Woskov, a senior fusion research engineer at MIT.

This is how Quaise plans to take advantage of existing infrastructure such as coal-fired power plants. These facilities already have huge capacities to convert steam to electricity, as well as established commercial operators and experienced workforce.

In addition, they are connected to the electrical network. Quaise will simply replace current fossil heat sources with enough supercritical geothermal energy to spin the turbines indefinitely without ever needing a piece of coal. Geothermal energy can therefore decarbonize for industrial, agricultural and residential applications. There are more than 8500 coal-fired power plants in the world, totaling more than 2000 gigawatts of capacity, and they will all have to scale by 2050. The opportunity is clearly daunting.
https://trustmyscience.com/geothermie-s ... rofondeur/
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izentrop
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Re: Deep geothermal energy




by izentrop » 01/03/22, 16:03

Well it's not tomorrow the day before
Quaise is working on large-scale, field-deployable demonstration machines, which it says will start operating in 2024. It plans to have its first "super hot enhanced geothermal system" rated at 100 megawatts in operation by 2026.
https://newatlas.com/energy/quaise-deep ... ave-drill/

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Exnihiloest
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Re: Deep geothermal energy




by Exnihiloest » 01/03/22, 22:33

izentrop wrote:Well it's not tomorrow the day before...

It looks very interesting. We really have high temperatures at only 20 km depth? Everywhere ?
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izentrop
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Re: Deep geothermal energy




by izentrop » 02/03/22, 00:00

Exnihiloest wrote:
izentrop wrote:Well it's not tomorrow the day before...
It looks very interesting. We really have high temperatures at only 20 km depth? Everywhere ?
It would seem from what was discovered at 12.2 km https://www.bbc.com/future/article/2019 ... e-ever-dug

In any case, if it is realistic, here is a project like nuclear power which would make it possible to decarbonize the excess released into the atmosphere by humanity, while avoiding too abrupt an energy decrease...
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Christophe
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Re: Deep geothermal energy




by Christophe » 02/03/22, 10:02

Exnihiloest wrote:only 20 km deep


: Shock: : Shock: : Shock:

Otherwise I have never managed to melt a stone in my microwave oven... you yes? : Mrgreen:

I don't even know if a pebble heats up in a microwave... : Lol:
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Leo Maximus
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Re: Deep geothermal energy




by Leo Maximus » 02/03/22, 15:31

Christophe wrote:
Exnihiloest wrote:only 20 km deep


: Shock: : Shock: : Shock:

Otherwise I have never managed to melt a stone in my microwave oven... you yes? : Mrgreen:

I don't even know if a pebble heats up in a microwave... : Lol:

A terracotta mug gets very hot in a microwave.
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Leo Maximus
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Re: Deep geothermal energy




by Leo Maximus » 02/03/22, 15:39

We are trying to thermolyse water with deep geothermal energy. Water is injected and hydrogen is recovered.
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Christophe
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Re: Deep geothermal energy




by Christophe » 02/03/22, 18:21

Léo, we are talking about the drilling process...500°C are not enough to do the thermolysis...

But your idea is worth considering...
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Re: Deep geothermal energy




by Remundo » 02/03/22, 18:28

the thermolysis of water requires more than 2000°C and it is not easy to separate H2 and O2 at these temperatures...

on the other hand if we manage to have calories at 500°C, we can already make a lot of electricity.

The improvement of drilling techniques, then of thermal extraction from the depths of the earth, is an area to be developed.
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