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Abundant Power from Universal Geothermal Energy
Technology Review (MIT) ^ | August 1, 2006 | By Kevin Bullis

Posted on 08/01/2006 11:15:01 AM PDT by aculeus

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To: aculeus
Imagine that only a fraction of a percent comes out. It's still big.

Imagine if I could convince "only a fraction of a percent" of the people on earth to give me $10.......I'd be rich!!!!!

21 posted on 08/01/2006 11:36:16 AM PDT by Onelifetogive (* Sarcasm tag ALWAYS required. For some Freepers, sarcasm can NEVER be obvious enough.)
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To: domenad
I have never understood how Geothermal energy works. Theoretically, a very hot earth core would radiate heat outward until temperature throughout the crust equalized. What produces the heat? If you drain the core of heat, how is it replenished?

Its a nuclear reaction, pretty much self-sustaining and on a the human scale, limitless. But.

This guy is flat out dishonest.
Yes, the heat is there and it's almost limitless but...

He completely ignores the problems associated with its extraction, which have not been solved. I have lived all my life in the area close to the guysers, and the production has been scaled back dramatically since the trial began 30-40 years ago.

The problem is similar to oil shale extraction. The process is easy enough. Dealing with the byproducts is not.
Heavy concentrations of minerals in the process render all the equipment useless in a very short time. Treating the mineral deposits and neutralizing them renders the resulting energy uneconomical; when factoring in the total cost of extraction, it is still economically not viable today.

The problem is analagous to the ICC building at Georgetown University, with a gigantic roof covered with solar cells which had great promise. Until the cost of maintenance and keeping the cells clean for peak efficiency was factored in. It is now just a feel-good white elephant.

There is a fundamental dishonesty with subsidized energy production.

22 posted on 08/01/2006 11:36:20 AM PDT by Publius6961 (overwhelming force behaving underwhelmingly is a waste.)
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To: domenad

Consider that a very large object like earth has a huge volume compared to surface area - as explained by this page:

http://www.tiem.utk.edu/~gross/bioed/bealsmodules/area_volume.html

Since heat can only escape via the surface, most of the heat generated by radioactive decay is trapped inside.

You couldn't drain the core of heat no matter how you tried - The huge amounts of heat we could drill to are a mere onion skin on the earth.


23 posted on 08/01/2006 11:37:12 AM PDT by ko_kyi
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To: domenad
One company, Ormat an Israeli company with offices in Reno, Nevada, has some information on Geothermal. They are one of the world's leaders in the designing and construction of these type of plants. To give you an idea of what is required, here is a picture of one small plant:

In the middle of that small picture is a double shafted motor or generator, probably about 700-1000 HP, connected to what are either a pump and a turbine or possibly two turbines. That equipment represents well over a million in capitol costs alone.

24 posted on 08/01/2006 11:38:37 AM PDT by Michael.SF. (The problem with socialism is that eventually you run out of other peoples money -- M. Thatcher)
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To: CedarDave

The antifreeze liquid comes out of the ground at 59 F.


25 posted on 08/01/2006 11:39:34 AM PDT by Eric in the Ozarks (BTUs are my Beat.)
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To: Publius6961
which have not been solved

Go to the website linked above in my post and educate yourself a bit. The problems you refer to have been solved and are used on a daily basis.

The Geysers has reduced capacity because the geothermal field has been depleted to the point of no longer being economically viable as it once was.

26 posted on 08/01/2006 11:43:14 AM PDT by Michael.SF. (The problem with socialism is that eventually you run out of other peoples money -- M. Thatcher)
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To: All

27 posted on 08/01/2006 11:45:18 AM PDT by WakeUpAndVote (Got towel?)
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To: domenad

The heat is produced by radioactivity within the earth. It's a small amount of radioactivity per cubic inch of interior, but there are a whole lot of cubic inches of material within the earth. The outer layer of the earth acts like a super insulator. The "R" value of the earth is not too good. It's only about R=1 per inch of thickness, compared with R=3 or 4 per inch for a good ceiling insulation. However, again, there are a whole lot of inches of insulation in several miles thickness of earth surface layers. So, the heat from the radioactivity is contained within the earth because of this very thick insulation layer on the surface. The amount of heat generated is large compared with the mount that would be used up with any geothermal devices, so it should last indefinitely.


28 posted on 08/01/2006 11:47:17 AM PDT by norwaypinesavage
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To: Publius6961
I said: The problems you refer to have been solved and are used on a daily basis. Correction:

Many of the problems you refer to have been solved and Geothermal Energy is succesfully used on a daily basis.

29 posted on 08/01/2006 11:50:18 AM PDT by Michael.SF. (The problem with socialism is that eventually you run out of other peoples money -- M. Thatcher)
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To: domenad

Radiation, pressure, and friction.


30 posted on 08/01/2006 11:53:51 AM PDT by Lunatic Fringe (Man Law: You Poke It, You Own It)
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To: aculeus
That's all we need, more Global Warming.
31 posted on 08/01/2006 11:54:48 AM PDT by SmithL (The fact that they can't find Hoffa is proof that he never existed.)
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To: scooter2
Let California live off of geothermal energy. That would reduce the national consumption by about 20% right there and reduce the price of everything else. But, being California, if there is a solution to some problem they will find a way to screw it up, over-regulate it or simply ban it because it causes some other problem (like smell, or heat, or pollution, or noise). Just watch. Its one of the only constants in the universe - the ability of the State of California to foil any solution to any problem.

Nevada is also a huge source for geo-thermal energy in the areas which are entirely owned by the Federal Government and used as a buffer between civilization and the secret air force base which doesn't exist a couple hours north-northwest of Las Vegas.

32 posted on 08/01/2006 12:06:24 PM PDT by bpjam (Remember our fallen Marines from Beirut. Hezbollah deserves no peace.)
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To: Eric in the Ozarks
"We put in a geothermal system (four 200 foot wells under our driveway) ... The AC is essentially free."

Eric, I'm assuming AC means Air Conditioning.

In areas where freezing or snow occurs, a few loops under the driveway to bring the Earth's latent heat up to melt the snow would also be welcome.

I wonder if anyone has tried to put together a low-grade energy generation system utilizing a solar collector for the heat, and a geothermal loop for the cooling? While it would be somewhat weather dependent, the investment costs seem affordable enough to make it worth while for a small plant. Some heat and cooling would be secondary benefits of such a system.

Or to look at it another way, keeping your house cool in the Summertime, and your driveway free of snow and ice in the Wintertime, would be the primary benefits, and a steady stream of low-wattage energy for lights and the refrigerator would be secondary benefits.

33 posted on 08/01/2006 12:11:40 PM PDT by NicknamedBob (Everybody always looks here for some really incredible insight, and they always find this stuff.)
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To: Michael.SF.
"Many of the problems you refer to have been solved and Geothermal Energy is succesfully used on a daily basis."

In a very limited area, where it happens to be both readily accessible and near population centers, which set of special conditions is exceedingly rare.

But the "universal geothermal energy" proposed here is sheer crackpottery.

34 posted on 08/01/2006 12:12:12 PM PDT by Wonder Warthog (The Hog of Steel-NRA)
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To: domenad

Internal heating within the Earth comes from the gravity compression from formation of the planet plus radioactive decay of Potassium, Uranium, and Thorium. It will continue for many millenia. More info here: http://www.sciencedaily.com/releases/2003/12/031215072752.htm


35 posted on 08/01/2006 12:13:24 PM PDT by MainFrame65
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To: NicknamedBob

We do get snow in mid-Missouri and you're correct. The snow melts on the cement driveway, courtesy of this system. Check it out at www.waterfurnace.com.


36 posted on 08/01/2006 12:14:38 PM PDT by Eric in the Ozarks (BTUs are my Beat.)
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To: Uncledave
I think I'll start a Renewable Energy Ping list.

Put me on. I'm very interested.

37 posted on 08/01/2006 12:14:55 PM PDT by Dementon (You're unique! Just like everyone else!)
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To: MainFrame65

That was very interesting, thank you!


38 posted on 08/01/2006 12:17:50 PM PDT by domenad (In all things, in all ways, at all times, let honor guide me.)
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To: SmithL
"That's all we need, more Global Warming."

No, actually, it's Global Cooling.

That part of the Globe is already Hot as ... well let's just say it's hot.

39 posted on 08/01/2006 12:18:35 PM PDT by NicknamedBob (Everybody always looks here for some really incredible insight, and they always find this stuff.)
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To: Uncledave; Dementon; Eric in the Ozarks
"I think I'll start a Renewable Energy Ping list."

Geothermal Energy is not renewable. It's simply inexhaustible.

But ... at least there is that -- "no exhaust."

40 posted on 08/01/2006 12:23:12 PM PDT by NicknamedBob (Everybody always looks here for some really incredible insight, and they always find this stuff.)
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