13 Apr 2011, 2:30 pm
13 Apr 2011, 3:14 pm
If you plugged in the lowest achieved temperature recorded, and the planck temperature, you get an efficiency of 1 - (7.05 x 10^-42). So pretty high, but not exactly one. Still, an engine that efficient would be great.
I'm actually suprised 60% efficiency has been reached, I thought Ruveyn's numbers would be as high as efficiency got 
13 Apr 2011, 3:22 pm
I wonder what the efficiency of an antimatter fueled engine would be? Close to 100%? 
13 Apr 2011, 3:39 pm
Vigilans wrote:
I wonder what the efficiency of an antimatter fueled engine would be? Close to 100%?
Hell, efficiency wouldn't really matter. For every kg would should get the equivalent of forty megatonnes of TNT of energy. I think a significant amount of the energy is bled into neutrinos though.
13 Apr 2011, 3:41 pm
ryan93 wrote:
Vigilans wrote:
I wonder what the efficiency of an antimatter fueled engine would be? Close to 100%?
Hell, efficiency wouldn't really matter. For every kg would should get the equivalent of forty megatonnes of TNT of energy. I think a significant amount of the energy is bled into neutrinos though.
Its a fairly recent discovery but it is now known that antimatter is sometimes formed high above thunderstorms. I believe the launched a satellite observatory with instrumentation on-board capable of searching for antimatter. I have a lot of hopes for this, as antimatter is pretty much the best solution I am aware of
13 Apr 2011, 3:51 pm
ruveyn wrote:
ryan93 wrote:
Quote:
True for extraction technologies. It's not so clear how true that is for usage technologies improving energy efficiency. There's no theoretical limit to how efficient transportation or climate control can get; with perfect insulation, heating becomes unnecessary, for example.
Sure there is.
The second part pretty much says that entropy increase is inevitable in an engine. So there has to be heat loss, which means inefficiency.
As for perfect insulation, it has to be transported, often by oil consuming vehicles. In any case, oil is probably used in some point of the production of the insulation.
The only perfectly efficient heat engine is one with its sink temperature at absolute 0. In short, there is, as you say, no perfectly efficient heat engine. The best we can do with combustion engines running very, very hot is maybe 35 to 40 percent and that is stretch.
ruveyn
Not completely true, quasiturbine engines got a efficiency of 80%.
Vigilans wrote:
ryan93 wrote:
Vigilans wrote:
I wonder what the efficiency of an antimatter fueled engine would be? Close to 100%?
Hell, efficiency wouldn't really matter. For every kg would should get the equivalent of forty megatonnes of TNT of energy. I think a significant amount of the energy is bled into neutrinos though.
Its a fairly recent discovery but it is now known that antimatter is sometimes formed high above thunderstorms. I believe the launched a satellite observatory with instrumentation on-board capable of searching for antimatter. I have a lot of hopes for this, as antimatter is pretty much the best solution I am aware of
13 Apr 2011, 4:13 pm
13 Apr 2011, 4:47 pm
13 Apr 2011, 4:48 pm
Vigilans wrote:
ryan93 wrote:
Vigilans wrote:
I wonder what the efficiency of an antimatter fueled engine would be? Close to 100%?
Hell, efficiency wouldn't really matter. For every kg would should get the equivalent of forty megatonnes of TNT of energy. I think a significant amount of the energy is bled into neutrinos though.
Its a fairly recent discovery but it is now known that antimatter is sometimes formed high above thunderstorms. I believe the launched a satellite observatory with instrumentation on-board capable of searching for antimatter. I have a lot of hopes for this, as antimatter is pretty much the best solution I am aware of
Can you produce a scientific paper verifying this?
ruveyn
13 Apr 2011, 4:49 pm
ruveyn wrote:
Vigilans wrote:
ryan93 wrote:
Vigilans wrote:
I wonder what the efficiency of an antimatter fueled engine would be? Close to 100%?
Hell, efficiency wouldn't really matter. For every kg would should get the equivalent of forty megatonnes of TNT of energy. I think a significant amount of the energy is bled into neutrinos though.
Its a fairly recent discovery but it is now known that antimatter is sometimes formed high above thunderstorms. I believe the launched a satellite observatory with instrumentation on-board capable of searching for antimatter. I have a lot of hopes for this, as antimatter is pretty much the best solution I am aware of
Can you produce a scientific paper verifying this?
ruveyn
This is where I first read about it, I believe:
http://www.space.com/10602-antimatter-beams-thunderstorms-nasa.html
13 Apr 2011, 4:54 pm
13 Apr 2011, 5:09 pm
ruveyn wrote:
Tollorin wrote:
Monopoles and fusion-fission hybrids for a shorter term solution, are more promising.
A magnetic monopole has never been observed and controlled fusion has been a bust. Controlled fusion has been 30 years in the future for the last 50 years and a hundred years from now it will still be 30 years in the future.
ruveyn
A monopole was observed recently
http://www.sciencedaily.com/releases/20 ... 163725.htm
13 Apr 2011, 5:12 pm
ryan93 wrote:
ruveyn wrote:
Tollorin wrote:
Monopoles and fusion-fission hybrids for a shorter term solution, are more promising.
A magnetic monopole has never been observed and controlled fusion has been a bust. Controlled fusion has been 30 years in the future for the last 50 years and a hundred years from now it will still be 30 years in the future.
ruveyn
A monopole was observed recently
http://www.sciencedaily.com/releases/20 ... 163725.htm
I read that article too. It might be magnetic monopole. It might not be. The matter is still in dispute.
It is a preliminary finding and more work will have to be done before a firm conclusion is reached and verified.
ruveyn
13 Apr 2011, 5:31 pm
13 Apr 2011, 5:36 pm
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