First! Fusion Net Energy Gain

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Mar 11, 2004
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Yes, desalination. And also the food supply. Think vertical farms within say 10 miles of major population centers. Right now the power cost of indoor lighting is why they aren't being built except as propotypes.

You're gonna have to actually support this claim as it sure sounds like you're just making shit up or pulling it out of your ass. (You have to be a dad, "turn off the damn lights, don't you know how much it costs!!!") Further, have you ever heard of this thing called a greenhouse? If the cost of the lighting was the issue we'd be seeing vertical greenhouses built like that instead. The capital needed for trying to rent/buy/build near dense urban areas is likely the actual prohibitive cost.
 

Moonbeam

Elite Member
Nov 24, 1999
73,260
6,344
126
You're gonna have to actually support this claim as it sure sounds like you're just making shit up or pulling it out of your ass. (You have to be a dad, "turn off the damn lights, don't you know how much it costs!!!") Further, have you ever heard of this thing called a greenhouse? If the cost of the lighting was the issue we'd be seeing vertical greenhouses built like that instead. The capital needed for trying to rent/buy/build near dense urban areas is likely the actual prohibitive cost.

Commercial farms are using abandoned factory buildings. Lots of those in some cities.

Vertical farms have a significantly higher average energy use at 38.8 kWh per kg of produce compared to traditional greenhouses, which average 5.4 kWh per kg.

Anybody with a yard that gets sun can easioygrow vertically easily up to 6 ft without artificial lighting and higher with increased effort.
 
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Moonbeam

Elite Member
Nov 24, 1999
73,260
6,344
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My opinion on the fusion thingi is that owing to the unknowns, how far off commercial facilities are or even if the technological challenges can be mastered, it is better to keep development dollars and intellectual talent devoted to the effort small enough that it does not negatively impact the growth rate of solar, wind, tide, transmission line, and storage solutions where real progress and increasing supply are already happening and need to be further accelerated. I think it could be a pipe dream that too much faith in is being manufactured by that industry and politicians generally to find their own personal reasons to hype. I would go with what we have that will work and deemphasize fusion for better times.
 
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Pohemi

Diamond Member
Oct 2, 2004
9,436
12,973
146
My opinion on the fusion thingi is that owing to the unknowns, how far off commercial facilities are or even if the technological challenges can be mastered, it is better to keep development dollars and intellectual talent devoted to the effort small enough that it does not negatively impact the growth rate of solar, wind, tide, transmission line, and storage solutions where real progress and increasing supply are already happening and need to be further accelerated. I think it could be a pipe dream that too much faith in is being manufactured by that industry and politicians generally to find their own personal reasons to hype. I would go with what we have that will work and deemphasize fusion for better times.
I agree. Fusion is new and exciting, the next (and possibly last?) major hurdle in power generation technology. However, I don't believe we should put all or the majority of efforts, hopes, dreams, funding, time, etc. into it at the cost of other clean energy types. Wind, solar, geothermal, and even tidal have already progressed and advanced for decades already. We can't be trying to hop-skip over them into fusion.
 

thilanliyan

Lifer
Jun 21, 2005
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Yeah fusion seems to eternally be 20-50 yrs away. I'm not 100% certain we can overcome the technical challenges and get a true positive output, but hope we do.

The sun has many advantages over us when it comes to fusion, not sure we can ever mimic those.
 
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eelw

Diamond Member
Dec 4, 1999
9,776
4,970
136
Yeah fusion seems to eternally be 20-50 yrs away. I'm not 100% certain we can overcome the technical challenges and get a true positive output, but hope we do.

The sun has many advantages over us when it comes to fusion, not sure we can ever mimic those.
That’s the odd thing, can generate far higher temps in a laboratory than even in the core of the sun. Unsure if the magnetic fields generated are comparable. But yeah having over 1x10^30 hydrogen atoms, the sun has an slight advantage
 

Ajay

Lifer
Jan 8, 2001
16,094
8,109
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This was a big step that the fusion industry has been stuck on for a long time. However over the last 50 years plasma performance has improved by 10,000 times from the first devices in the 50’s. Approximately one more order of magnitude jump will make fusion commercially viable.
Point taken. Still, with Tokamaks, the increases in size necessary to hit sufficient next power will not be commercially viable due to initial cost (no investors would be willing to sink that much money into a project with such long lead times till revenue generation). There is also the problem of not having enough Tritium at present to support more than one fusion reactor.

So, I'm curious what you think might be a more compelling technology in development that could possibly be in commercial production in the next 30 years or so.
 

hal2kilo

Lifer
Feb 24, 2009
24,217
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Yeah fusion seems to eternally be 20-50 yrs away. I'm not 100% certain we can overcome the technical challenges and get a true positive output, but hope we do.

The sun has many advantages over us when it comes to fusion, not sure we can ever mimic those.
Yea, like massive gravity.
Of course there is another theory, which I'm not a firm believer in, but there's a company that was trying to model this idea and found some very interesting things.

First the theory: Electric Sun theory | The Electric Universe Theory

And a company investigating this theory: https://www.safireproject.com
 
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woolfe9998

Lifer
Apr 8, 2013
16,189
14,114
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My opinion on the fusion thingi is that owing to the unknowns, how far off commercial facilities are or even if the technological challenges can be mastered, it is better to keep development dollars and intellectual talent devoted to the effort small enough that it does not negatively impact the growth rate of solar, wind, tide, transmission line, and storage solutions where real progress and increasing supply are already happening and need to be further accelerated. I think it could be a pipe dream that too much faith in is being manufactured by that industry and politicians generally to find their own personal reasons to hype. I would go with what we have that will work and deemphasize fusion for better times.

The US government spends about $700 million per year on fusion research. It's set to spend $6.25 trillion in total this year. We could triple our investment in fusion and no one would even notice.
 

Moonbeam

Elite Member
Nov 24, 1999
73,260
6,344
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The US government spends about $700 million per year on fusion research. It's set to spend $6.25 trillion in total this year. We could triple our investment in fusion and no one would even notice.
Good point but I did watch a Biden official gushing up and down over the recent breakthrough including all the new interest from commercial investment and college students in fission. I think that commercial fusion is a long long way off down the road, sometime after climate disaster will become full blown.
 

woolfe9998

Lifer
Apr 8, 2013
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Good point but I did watch a Biden official gushing up and down over the recent breakthrough including all the new interest from commercial investment and college students in fission. I think that commercial fusion is a long long way off down the road, sometime after climate disaster will become full blown.

Yes, it likely won't come soon enough to help us reduce carbon emissions to zero. But if we're in a bad way say by 2070 and it comes along, it may help us get out of it by way of powering free air carbon capture. Either way, we need to increase funding because the sooner it comes, the better.

If we had increased funding for it 30 years ago, who knows, we might be a lot closer now. But then, we've slowed walked everything that could help us avert this crisis.
 

Moonbeam

Elite Member
Nov 24, 1999
73,260
6,344
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Yes, it likely won't come soon enough to help us reduce carbon emissions to zero. But if we're in a bad way say by 2070 and it comes along, it may help us get out of it by way of powering free air carbon capture. Either way, we need to increase funding because the sooner it comes, the better.

If we had increased funding for it 30 years ago, who knows, we might be a lot closer now. But then, we've slowed walked everything that could help us avert this crisis.

I have been interested in the question of free energy since I was a child. That was sometime back. The simple answer that fusion could provide was always clear to me and in all that time of special interest. Over that period of time and with that of special interest, I have developed a feeling that the technical complexities of containment are best left to a gravity well. perhaps some day we will build a Dyson Sphere, but I think something similar can be done on earth. I believe the Earth should be guarded around the equator with a solar powered electrical grid. The sun shines somewhere when it is dark here. That is what we should have funded long ago, in my opinion.
 

eelw

Diamond Member
Dec 4, 1999
9,776
4,970
136
I have been interested in the question of free energy since I was a child. That was sometime back. The simple answer that fusion could provide was always clear to me and in all that time of special interest. Over that period of time and with that of special interest, I have developed a feeling that the technical complexities of containment are best left to a gravity well. perhaps some day we will build a Dyson Sphere, but I think something similar can be done on earth. I believe the Earth should be guarded around the equator with a solar powered electrical grid. The sun shines somewhere when it is dark here. That is what we should have funded long ago, in my opinion.
Nah Artimus mission was preparation to make a moon beam!!!
 
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Jaskalas

Lifer
Jun 23, 2004
33,981
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There are fusion projects that are looking at small reactors. I recall seeing a Youtube channel cover one such project and theirs woud fit in a trailer. One of the use cases was using it for emergency power after a natural disaster. This version would fire two fuel pellets at each other to achieve fusion. Not sure how feasible it was though.

Check out this video then, maybe it is the one you saw?
Either way, P&N may be interested.

 
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eelw

Diamond Member
Dec 4, 1999
9,776
4,970
136
Very early days for Helion. Pretty new tech compare to Tokamaks and Stellarators.
And doesn't appear to be a government funded project. So private entity going to charge a lot for it if it makes it to market
 

Zorba

Lifer
Oct 22, 1999
15,238
10,813
136
At this point we can't do it cost effectively with fusion. We'd need some order-of-magnitude increases in capabilities of carbon scrubbers to even approach the idea of a fusion-powered carbon farm. Hell, we're closer to the fusion part of that than the scrubber part of that.

Eh? Condensing boilers are like 90% efficient. Steam turbines are above that. It's trivial to hook up thing that generates heat to water cycle that drives a turbine. That said, you'd need quite a bit above 10% net to make something like this worthwhile to build, but I bet if they hit 50% net they could build a prototype reactor and start looking for more efficiencies to build off of.
Look up Carnot efficiency for heat engines. Even if the individual components were 100% efficient, the overall heat cycle would not be.
 
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Zorba

Lifer
Oct 22, 1999
15,238
10,813
136
It's what I call an irrational risk fixation. People become fixated on certain risks. For example, one person is so obsessed with bridges collapsing that he'll drive 50 extra miles to avoid crossing one, but the higher risk of merely driving in a car with the attendant MVA fatility disk doesn't cause any anxiety.

I suspect people have psychologically associated nuclear plants with nuclear weapons.
Or Three Mile Island or Chernobyl. If Chernobyl happened in the US, I'm pretty sure we would've taken out the entire watershed. Because I don't believe we would've ordered people to go in and risk their lives immediately.

TMI just shows how little you can trust companies, as they continued cutting cutting corners all the way through the clean up.

Regardless, the problem with current nuclear is that while the probability of failure is very low, the consequence is extremely high.
 
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eelw

Diamond Member
Dec 4, 1999
9,776
4,970
136
Or Three Mile Island or Chernobyl. If Chernobyl happened in the US, I'm pretty sure we would've taken out the entire watershed. Because I don't believe we would've ordered people to go in and risk their lives immediately.

TMI just shows how little you can trust companies, as they continued cutting cutting corners all the way through the clean up.

Regardless, the problem with current nuclear is that while the probability of failure is very low, the consequence is extremely high.
I’m outside the immediate danger zone if something happens at the Pickering nuclear power plant here in the northern Toronto area. Unsure where else we’d get our power from without it with proposed decommissioned of it slated in 2025.
 

Moonbeam

Elite Member
Nov 24, 1999
73,260
6,344
126
Nah Artimus mission was preparation to make a moon beam!!!
With a space elevator, if achievable, we could move manufacturing off planet as well as energy production, but without that I do not fancy the idea of using microwaves to send energy from space to earth.
 

Moonbeam

Elite Member
Nov 24, 1999
73,260
6,344
126
Or Three Mile Island or Chernobyl. If Chernobyl happened in the US, I'm pretty sure we would've taken out the entire watershed. Because I don't believe we would've ordered people to go in and risk their lives immediately.

TMI just shows how little you can trust companies, as they continued cutting cutting corners all the way through the clean up.

Regardless, the problem with current nuclear is that while the probability of failure is very low, the consequence is extremely high.
And the imagination is seldom interested in probability. You could even say that's why it's called imaginative, not probabilisticly sound. I think fear is really rapid mind movement, or uncontrolled associations that spirel out of control when traumatic memory threatens to break from it's usual repressed state by some triggering external stimulus. Fear of nuclear disaster provided a fertile field for such paranoias to flourish. And, as we know, bring people around to rational thinking isn't easy owing to the fassive levels of stress we have in our society today.
 

woolfe9998

Lifer
Apr 8, 2013
16,189
14,114
136
Or Three Mile Island or Chernobyl. If Chernobyl happened in the US, I'm pretty sure we would've taken out the entire watershed. Because I don't believe we would've ordered people to go in and risk their lives immediately.

TMI just shows how little you can trust companies, as they continued cutting cutting corners all the way through the clean up.

Regardless, the problem with current nuclear is that while the probability of failure is very low, the consequence is extremely high.

I don't think Chernobyl or Fukashima are relevant to the US nuclear industry with its complex regulations. TMI happened 45 years ago and was not exactly catastrophic. Taken as a whole, the US nuclear industry and its governing regulations have an excellent safety record. ANd we're not the only ones. France has 55 reactors, most for 50+ years, and has never had a single accident.

When you compare the net impact of nuclear since the 1950's to the burning of fossil fuels, fossil fuels have caused at least 2 orders of magnitude more deaths.
 
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