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PeakOil is You

THE Discovery Channel Thread (merged)

What's on your mind?
General interest discussions, not necessarily related to depletion.

Re: Discovery's clueless "Building the Future"

Unread postby advancedatheist » Mon 11 Jun 2007, 11:19:40

$this->bbcode_second_pass_quote('gnm', 'A')dvanced, wind is one of the few alternative energy systems which has a fairly high return on investment. There is no reason even a 19th century economy couldn't build and maintain wind generators. Maybe not 400ft monsters out in the sea, but certainly large land based ones. Now if we can get past the NIMBY crap.-G


I suppose the post Peak Dutch could manufacture their windmills using electricity from tidal or wind power and haul them to sailing ships with their sturdy Friesian horses. But how do they pound them into the sea floor without energy from fossil fuels?
"There was a time before reason and science when my ancestors believed in all manner of nonsense." Narim on <I>Stargate SG-1</i>.
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Re: Discovery's clueless "Building the Future"

Unread postby denverdave » Mon 11 Jun 2007, 11:28:47

$this->bbcode_second_pass_quote('advancedatheist', 'T')he whole process requires a massive subsidy of energy from fossil fuels to work, in other words, indicating that the windmill technology can't bootrstrap and sustain itself as the oil supply continues to decline. But the series just ignorantly passes this effort off as a "solution" to the energy crisis instead of a feel-good exercise.


There will still be plnety of oil to build and maintain wind turbines well into depletion if we make it a priority. That really isn't an argument not to build turbines, it's a reason why we should be making as many as we can now.
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Re: Discovery's clueless "Building the Future"

Unread postby denverdave » Mon 11 Jun 2007, 11:40:46

$this->bbcode_second_pass_quote('Windmills', 'M')ost optimists discussing wind and solar power often fail to mention that decent energy storage is not yet in our grasp. One result is that for every unit of installed wind or solar, you need a larger amount of conventional generating capacity to ensure that you don't have an intermittent system. Wind and solar can't stand on their own. They're more like conservation systems than anything, allowing us to stretch our fossil fuel reserves a little farther. And as with all conservation efforts, they will be undone by Jevons', the fact that we greedily cling to an infinite growth/consumption economic model, and constant population growth.


Of course wind power won't meet all of our needs, but that's not a reason not to take advantage of it. Even intermittent electricity is better than no electricity at all. If you see a 20 dollar bill on the sidewalk, you're not going to just leave it because it's not enough to cover your bills.

And about conservation efforts being undone by Jevon's paradox: Of course they will, thats the whole point, to free up more resources that would otherwise go to waste. We don't need to worry about reducing our fossil fuel consumption, reality will take care of that. Our problem is how we are going to adapt to it.
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Re: Discovery's clueless "Building the Future"

Unread postby Armageddon » Mon 11 Jun 2007, 11:42:33

There will always be oil in the ground, always. Civilization will collapse economically and massive die off will happen LONG before all the oil will be used up. When we are down to only 60 mbpd, the economy would be destroyed.
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Re: Discovery's clueless "Building the Future"

Unread postby mgibbons19 » Mon 11 Jun 2007, 12:03:51

$this->bbcode_second_pass_quote('denverdave', '
')And about conservation efforts being undone by Jevon's paradox: Of course they will, thats the whole point, to free up more resources that would otherwise go to waste. We don't need to worry about reducing our fossil fuel consumption, reality will take care of that. Our problem is how we are going to adapt to it.


After 2.5 years spent on this site, I think this best summarizes where I've come to rest on the whole issue.

Well put.
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Re: Discovery's clueless "Building the Future"

Unread postby Twilight » Mon 11 Jun 2007, 12:44:38

Wind is a stop-gap which can slow, but not arrest our descent, if we give it sufficiently high priority when allocating energy and mineral resources. The problem is eventually this will only be possible under the auspices of an unpopular command economy.

Like anything else, wind is not a magic bullet, but so long as you do not go in with unrealistic expectations, it will do a few things which you want it to do. It just comes at a cost, on the downslope you will have to make painful sacrifices.
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Re: Discovery's clueless "Building the Future"

Unread postby nth » Mon 11 Jun 2007, 15:48:21

The scary part of this show is that they are showing researchers who are willing to use methane hydrates. If we do use it, then we will have plenty of natural gas to burn!
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Re: Discovery's clueless "Building the Future"

Unread postby peripato » Mon 11 Jun 2007, 22:45:52

$this->bbcode_second_pass_quote('Falconoffury
', 'H')as it ever occurred to them that maybe we won't?

We live in a world of great expectations. Everyone loves the idea of progress and it is expected, without hesitation, by almost all people, that technology will solve all our problems through the mechanism of perpetual growth. The added benefit of this way of thinking is that we do not have to take responsibility for addressing any of them today.

In fact this way of thought is hard-wired in our brains. We were selected, over thousands of generations, to discount the effect of risks in the future, as they did not serve our purposes for survival in the here and now. That's why people come up with lame-brained solutions in isolation which inevitably have the effect of making matters worse.
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Re: Discovery's clueless "Building the Future"

Unread postby Judgie » Tue 12 Jun 2007, 01:01:58

$this->bbcode_second_pass_quote('nth', 'T')he scary part of this show is that they are showing researchers who are willing to use methane hydrates. If we do use it, then we will have plenty of natural gas to burn!


The big problem with mining hydrates, is that they play a critical role in the stabilization of the seabed in the areas in which they can be found. Remember, they are usually covered by a comparatively thin crust (often only made up of soft sediments) and deposits can be up to a hundred or more meters in depth. Not something you want to collapse, unless you like surfing, like I do :twisted:
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Re: Discovery's clueless "Building the Future"

Unread postby Doly » Tue 12 Jun 2007, 11:04:55

$this->bbcode_second_pass_quote('Judgie', '
')The big problem with mining hydrates, is that they play a critical role in the stabilization of the seabed in the areas in which they can be found. Remember, they are usually covered by a comparatively thin crust (often only made up of soft sediments) and deposits can be up to a hundred or more meters in depth. Not something you want to collapse, unless you like surfing, like I do :twisted:


You mean you'd get big tsunamis?
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Re: Discovery's clueless "Building the Future"

Unread postby Judgie » Tue 12 Jun 2007, 11:29:58

$this->bbcode_second_pass_quote('Doly', '')$this->bbcode_second_pass_quote('Judgie', '
')The big problem with mining hydrates, is that they play a critical role in the stabilization of the seabed in the areas in which they can be found. Remember, they are usually covered by a comparatively thin crust (often only made up of soft sediments) and deposits can be up to a hundred or more meters in depth. Not something you want to collapse, unless you like surfing, like I do :twisted:


You mean you'd get big tsunamis?


From what i've read about hydrate deposits and to my line of thinking, yes. How big i'm not sure. I've heard that it is a concern of one or two petroeum engineers assigned to such projects, but i'll go and do some research tommorow at uni library and get back to you with facts :)
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Re: Discovery's clueless "Building the Future"

Unread postby nth » Tue 12 Jun 2007, 12:17:06

Methane hydrates are unstable. Mining these might trigger a big explosion, so yes, it may cause a tsunami or simply release a whole lot of methane into the atmosphere.
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Re: Discovery's clueless "Building the Future"

Unread postby halcyon » Tue 12 Jun 2007, 12:53:45

$this->bbcode_second_pass_quote('advancedatheist', 'i')t shows the construction of huge wind mills for generating electricity in the North Sea off of the Netherlands. The blades require diesel trucks to move from the factory to a ship, and the ship of course needs bunker fuel to transport the blades and foundation for installation in a rough sea. The whole process requires a massive subsidy of energy from fossil fuels to work, in other words, indicating that the windmill technology can't bootrstrap and sustain itself as the oil supply continues to decline. But the series just ignorantly passes this effort off as a "solution" to the energy crisis instead of a feel-good exercise.


Sure, it is a challenge.

However, wind energy, although no replacement for coal+oil+natgas, is already been calculated to be a net energy positive using modern installations (off-shore and on-shore).

http://www.eoearth.org/article/Energy_r ... ind_energy

This is data from non-advocate sources, so more believable than those nuclear industry 90:1 EROEI ratios.
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Re: Discovery's clueless "Building the Future"

Unread postby Twilight » Tue 12 Jun 2007, 15:11:27

Wouldn't there also be a buoyancy problem for anything floating over the release?
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Re: Discovery's clueless "Building the Future"

Unread postby Pablo2079 » Tue 12 Jun 2007, 15:25:08

$this->bbcode_second_pass_quote('', 'W')ouldn't there also be a buoyancy problem for anything floating over the release?


If you let it immediately rise to the surface, I think there would be.
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Re: Discovery's clueless "Building the Future"

Unread postby Tanada » Tue 12 Jun 2007, 18:47:08

$this->bbcode_second_pass_quote('nth', 'M')ethane hydrates are unstable. Mining these might trigger a big explosion, so yes, it may cause a tsunami or simply release a whole lot of methane into the atmosphere.


The neatest thing in the whole episode was when he inverted a jar over the methane seep and methane hydrate formed inside when it was trapped.

Of course if you find a methane seep wouldn't it be easier to just drill into the methane filled strata and take the methane directly rather than digging up the hydrate???
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To strive, to seek, to find, and not to yield.
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Re: Discovery's clueless "Building the Future"

Unread postby Judgie » Tue 12 Jun 2007, 22:46:08

$this->bbcode_second_pass_quote('Tanada', '')$this->bbcode_second_pass_quote('nth', 'M')ethane hydrates are unstable. Mining these might trigger a big explosion, so yes, it may cause a tsunami or simply release a whole lot of methane into the atmosphere.


The neatest thing in the whole episode was when he inverted a jar over the methane seep and methane hydrate formed inside when it was trapped.

Of course if you find a methane seep wouldn't it be easier to just drill into the methane filled strata and take the methane directly rather than digging up the hydrate???


Currently reading up on this stuff, haven't gotten to dissociation yet, but I gather the methane from the "seep" is produced by hydrate dissociation in the first place?
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Re: Discovery's clueless "Building the Future"

Unread postby TheDude » Wed 13 Jun 2007, 01:22:24

Clathrate Gun Hypothesis. This has been hashed out on this forum before. A formerly prolific and quite knowledgable member named Devil summed up the whole scheme of mucking about with methane hydrates as suicidal.
Of course we are mucking about with them; Japan examines ways to harvest frozen fuel - The Washington Times. Could be the ultimate transport fuel; or kill more life on Earth than anything in the past 550 million years.
We will be a bunch of baked potatoes quite soon anyway if things keep heating up. "Humans suck. We're a virus with shoes."
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Re: Discovery's clueless "Building the Future"

Unread postby yesplease » Wed 13 Jun 2007, 04:05:00

The useful work done by the heavy fuel oils to get those turbines up is likely a small fraction of the useful work the energy provided by them will do over their lifetimes.
$this->bbcode_second_pass_quote('Professor Membrane', ' ')Not now son, I'm making ... TOAST!
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Re: Discovery's clueless "Building the Future"

Unread postby Tanada » Wed 13 Jun 2007, 05:59:20

$this->bbcode_second_pass_quote('Judgie', '')$this->bbcode_second_pass_quote('Tanada', '')$this->bbcode_second_pass_quote('nth', 'M')ethane hydrates are unstable. Mining these might trigger a big explosion, so yes, it may cause a tsunami or simply release a whole lot of methane into the atmosphere.


The neatest thing in the whole episode was when he inverted a jar over the methane seep and methane hydrate formed inside when it was trapped.

Of course if you find a methane seep wouldn't it be easier to just drill into the methane filled strata and take the methane directly rather than digging up the hydrate???


Currently reading up on this stuff, haven't gotten to dissociation yet, but I gather the methane from the "seep" is produced by hydrate dissociation in the first place?


Oh no, Methane Hydrates only form when their is a combination of temperature, pressure and materials, a triple point reaction of sorts. If you do not have the right temperature/pressure spot on the gradient the methane remains a gas and either rises as bubbles or disperses. If you do have the right conditions the methane and water molecules coagulate together into an ice like material. If the pressure goes to low or the temperature goes to high the substance breaks back down into methane and water. On the ocean floor or in permafrost the combination of temperature and pressure are just right and methane gas seeping out of the ground from natural ges resevoirs or from decay products combine with water to form methane hydrate. One of the big fears about GW is that as the permafrost near the poles thaws out the temperature goes too high for methane hydrates to remain so they break back down into gas and water releasing all that stored methane into the atmosphere.
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