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Scientists convert processor heat back to electricity - Page 2

post #11 of 25
Quote:
Originally Posted by mrjminer View Post
Why don't you be the judge of that:
rofl That's awesome..
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post #12 of 25
Powering it's own fans is an excellent idea.
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post #13 of 25
Quote:
Originally Posted by sladesurfer View Post
Cool
Yes very--That is certainly an interesting roundabout from heat to sound to electricity.. good find!
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post #14 of 25
them K6s will want 1 they go up to 300c
post #15 of 25
This tech could potentially be good for hybrid cars to recharge batteries I think.
    
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post #16 of 25
Quote:
Originally Posted by pauldovi View Post
You don't need to cool down your processor if you turn the heat into electricity. That would violate the conservation of energy.

Lets look at it this way. Say your processor creates 100 Joules of energy per second (100 Watts). If this contraption can take 80% of that and then turn 80% of it into electricity, you are left with 64 watts of electricity and only 36 watts that you need to actually cool.
It works as a delta.... same principles that say you can't cool lower than ambient using air. so now look at it this way:

100 Watts - 36 Watts (removed by your heat sink) = 64. So now you have an excess of 64 watts and 80% of 64 is 51.2, so now you have to cool for 48.8 Watts

New iteration:

100 Watts, 48.8 cooled = 51.2 to be converted, so you convert 80% of that (40.96 Watts).... you see where i'm going with this? At a certain point you're cooling for 99.99999 Watts and converting 80% of .00001 Watts.

[edit] Now if it was a constant conversion (say 50 Watts) then the idea would work, but if it's %'s, then it wouldn't
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post #17 of 25
Quote:
Originally Posted by ae804 View Post
yea, but it seems very ineffecient. You won't get nearly enough power to do anything.... think of it this way: Power -> Heat (say ~80%) -> Sound (~95%) -> power again (~20%) so we're looking at getting back about 15%... which is some power, but not enough to do anything... plus you will still have to cool down your processor so the heat differential will reduce the results even more. It's a cool idea but not too applicable to this market... you may be able to light an LED off the power.
Even 15% of 200w is 30w. Thats enough for half a dozen HDDs, your water cooling loop or something else.
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post #18 of 25
Quote:
Originally Posted by ae804 View Post
yea, but it seems very ineffecient. You won't get nearly enough power to do anything.... think of it this way: Power -> Heat (say ~80%) -> Sound (~95%) -> power again (~20%) so we're looking at getting back about 15%... which is some power, but not enough to do anything... plus you will still have to cool down your processor so the heat differential will reduce the results even more. It's a cool idea but not too applicable to this market... you may be able to light an LED off the power.
Um, they said in the original post that the sound --> power conversion would only LOSE 20%, not only USE 20%. So you're right about energy being lost throughout the whole path, but it comes out to about 60.8% instead of 15%.

Quote:
Originally Posted by ae804 View Post
It works as a delta.... same principles that say you can't cool lower than ambient using air. so now look at it this way:

100 Watts - 36 Watts (removed by your heat sink) = 64. So now you have an excess of 64 watts and 80% of 64 is 51.2, so now you have to cool for 48.8 Watts

New iteration:

100 Watts, 48.8 cooled = 51.2 to be converted, so you convert 80% of that (40.96 Watts).... you see where i'm going with this? At a certain point you're cooling for 99.99999 Watts and converting 80% of .00001 Watts.

[edit] Now if it was a constant conversion (say 50 Watts) then the idea would work, but if it's %'s, then it wouldn't
You're thinking about if the processor only generated heat for one second, but cooling continued after that. Since it is continually generating heat (100w in this example), you'll be continually generating energy at the same rate. So, going by your iteration pattern, every iteration would be 80% of 100w (or 100w-64w if the heat sink gets teh heat before the energy conversion technique). This will not continue to lower and lower wattages as you suggest. If the processor temperature were to go up or down, you would generate more or less heat dependant on that.
post #19 of 25
Quote:
Originally Posted by SgtSpike View Post
Um, they said in the original post that the sound --> power conversion would only LOSE 20%, not only USE 20%. So you're right about energy being lost throughout the whole path, but it comes out to about 60.8% instead of 15%.
Ok, so i read that wrong.

Quote:
You're thinking about if the processor only generated heat for one second, but cooling continued after that. Since it is continually generating heat (100w in this example), you'll be continually generating energy at the same rate. So, going by your iteration pattern, every iteration would be 80% of 100w (or 100w-64w if the heat sink gets teh heat before the energy conversion technique). This will not continue to lower and lower wattages as you suggest. If the processor temperature were to go up or down, you would generate more or less heat dependant on that.
I'm not saying you're continually cooling the heat from a second, but that you will need to change the HS to dissipate more power. Plus, even if I'm completely wrong, do you want your processor to be cooled by something so balanced as this? What happens when you run a program and need to cool 150W? For this application i just don't see it working.
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post #20 of 25
Quote:
Originally Posted by ae804 View Post
Ok, so i read that wrong.



I'm not saying you're continually cooling the heat from a second, but that you will need to change the HS to dissipate more power. Plus, even if I'm completely wrong, do you want your processor to be cooled by something so balanced as this? What happens when you run a program and need to cool 150W? For this application i just don't see it working.
Air cooled TEC setups use a balance to keep condesation from forming. If the balance wacked out, you could lose your entire rig.
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