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Harnessing Underground Fires

05/27/2012 1:20 PM

The Centralia Pennsylvania coal mine fire has been burning and polluting for decades. Surely a lot of people have tried to think up a solution to putting it out, but has anyone thought of a way of harnessing the heat and gas? It is steadily adding pollution to the atmosphere. Could it be diverted to more fully burn it, and could the heat and gas be used to produce electricity. I realize it would probably cost more money than it is worth, but would end the excess pollution. Some of you are nearby and would know something about it. Here is a short article with pictures. http://io9.com/5913603/50-years-later-the-coal-fire-beneath-pennsylvania-still-burns It also has a link to a "Door to Hell" in Uzbekistan.

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#1

Re: Harnessing Underground Fires

05/27/2012 2:04 PM

The same thing crossed my mind when I saw the tv show. Looks like geothermal energy on a very usable scale to me. The big problem may be safe air for the builders of the energy plant. A source of water for cooling would increase efficiency.

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#2

Re: Harnessing Underground Fires

05/27/2012 5:05 PM

The energy from such fires is of moderately low intensity, widely dispersed, and subject to change of location. Thus it is HUGELY uneconomical to recover. This is one of those pie-in-the-sky ideas in which the decimal point is one or two places off, if anyone actually did any arithmetic.

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#3
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Re: Harnessing Underground Fires

05/27/2012 5:51 PM

Precisely the point I was going to make. GA

This is like asking why the thermal gradient created by human body heat is not used to power a Stirling engine to make electricity to power the grid. Once one looks at the real data and one does the mathematics, the answer is obvious.

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#15
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Re: Harnessing Underground Fires

05/29/2012 8:42 AM

Isnt that what they do in the "Matrix"?

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#16
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Re: Harnessing Underground Fires

05/29/2012 9:13 AM

I can't remember, did they ever put people in Jordan Canonical form? To do that they'd have to find the eigenvalues.

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#4

Re: Harnessing Underground Fires

05/27/2012 7:38 PM

This will give you some indication of the forces at work here...

http://everything2.com/node/762057?like_id=1340085&op=ilikeit

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#5
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Re: Harnessing Underground Fires

05/27/2012 7:54 PM

Oh, really?

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#6
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Re: Harnessing Underground Fires

05/27/2012 9:10 PM

So....

I wonder if you read the article you cited. Part of the article does mention that some presumably subterranean but unspecified locations did experience temperatures above 700°F. The article also mentioned that when simple trenches were dug to block a fire line the fire migrated faster than it took to dig a trench. Unlike the burning of coal in a firebox, the location where this heat will happen and for how long it will exist there is not under anyone's control or understanding. This is a slowly moving, but still moving wildfire.

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#9
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Re: Harnessing Underground Fires

05/28/2012 7:02 AM

From your answer, I don't think you get it....Follow the money....The town sits on 3000+ acre coal deposit worth many millions, the original individual owners had mineral rights, somebody offered to put out the fire for free, twice, when it required just a day's work, but neither was not allowed to do so, nobody seems to know how the fire started beyond rumor, the state now owns all the land, but for a few hold-outs, dangling by a legal thread....

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#10
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Re: Harnessing Underground Fires

05/28/2012 8:10 AM

That is a non sequiteur reply then. The expense of trying to extinguish this fire has nothing to do with harnessing the underground fire. Maybe we should consider the expense from Lyme disease born ticks invading the Centralia PA area, too.

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#12
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Re: Harnessing Underground Fires

05/28/2012 12:11 PM

Well I think that the State will allow some company to come in and extinguish the fire once they have total ownership...The entire area has been condemned, the people there now are considered illegal inhabitants....The idea that they will allow somebody to come in and take control of anything, is out of the question...

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#8
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Re: Harnessing Underground Fires

05/27/2012 9:36 PM

Wonderful article. It shows how poorly government and human nature can operate without good leadership. It should be a case study for public administration classes.

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#7

Re: Harnessing Underground Fires

05/27/2012 9:32 PM

does anyone have an idea on how to put this fire out. some of the best minds in the dep "insert chuckle here" have been trying for years.

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#11
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Re: Harnessing Underground Fires

05/28/2012 10:12 AM

I don't know the terrain, but it sounds like you would have to put a lake on top of it!

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#13

Re: Harnessing Underground Fires

05/28/2012 12:21 PM

In my opinion, harnessing this undergroung coal fire appears to be something the Federal government should be involved in. Many ideas have been presented in the past, but they were only ideas. No one has enough expertise or resources to attempt risking a lot of money on such a project with so many unknowns. It was probably thought many years back, that the fire would burn itself out eventually and they are probably still thinking that will happen.

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#14
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Re: Harnessing Underground Fires

05/28/2012 12:44 PM

Coal fires are not that rare, the standard procedure is to dig out the burning coal with a backhoe, or build a firebreak trench...

http://www.sciencedirect.com/science/article/pii/S0166516204000151

http://pubs.usgs.gov/fs/2009/3084/pdf/fs2009-3084.pdf

"Self-ignited, naturally occurring coal fires and fires resulting from human activities persist for decades in underground coal mines, coal waste piles, and unmined coal beds. These uncontrolled coal fires occur in all coal-bearing parts of the world (Stracher, 2007) and pose multiple threats to the global environment because they emit greenhouse gases-carbon dioxide (CO2), and methane (CH4)-as well as mercury (Hg), carbon monoxide (CO), and other toxic substances (fig. 1)."

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#17
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Re: Harnessing Underground Fires

05/29/2012 9:17 AM

Unfortunately the federal government is against burning coal now. If they wanted to put it out, it seems like they would consider this.

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#18

Re: Harnessing Underground Fires

05/29/2012 9:45 AM

It should be worth noting that one of our bloggers recently wrote about this in the OH CR4P! blog section.

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