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[Computerworld] Nanowires could boost solar power 15X (nanowire technology summary 06-13) - Page 2

post #11 of 16
I believe that just one of these would be amazing for home use, basically the hotter it gets (more sun) is the more energy the solar panel gets so we can run the A/C. Amazing, right?
post #12 of 16
Quote:
Originally Posted by kpriess View Post

I seriously need this technology to prosper, having all week 31C sunny days must have another purpose than elevating AC electric bills..
You use the AC when it's 31C? Just open a window.

Well, I guess it's ok if it's for a phase change setup:D
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post #13 of 16
Quote:
Originally Posted by Bit_reaper View Post

That's 20% of perpendicular light. The total amount of energy received at ground level from the sun at the zenith is 1004 watts per square meter. New designs do not only aim to widen the spectrum of captured light but also to make it possible to capture more omnidirectional rays. Basically having a lens that concentrates more surrounding light on to the cell.

Companies are also looking into integrating a second layer that would convert heat into electricity further increasing the W/m^2.

Right, but you cannot exceed that 1KW no matter what you try to do, at least not directly from the light itself (the residual heat thing, is actually more of an issue because of wasted energy not already captured by the cell, thus it becomes heat -> ie. wasted energy). The only reason they get the claim of 15x is because they are focusing the light, like a magnifying glass. So if you are measuring the light at the focal point, yeah, it might be that it is 15x the light energy, but if you look at the unaltered capture point it would still be the original 1KW per square foot.

Not sure how this helps anything, unless, it helps overcome the 50% efficiency barrier. Since they are capturing the light in a different manner, maybe they can achieve a theoretical 100% efficiency? If so, then that would be amazing. Going from 130W per square foot to something more like 900W per square foot would be an enormous improvement.

The only issue, is that is still does not detract from the "reliable" aspect of energy and the total failure on light to be reliable. Reliability of solar is already at a 3 to 1 ratio, and you still need backup power on top of that for night time. I am not saying a total no to solar, but we could never hope to make it even remotely close to the market share that say, coal is today... Just from that issue alone. It has a place, and a use, but replacing the world's power source is not it.
Quote:
Originally Posted by xxpenguinxx View Post

You use the AC when it's 31C? Just open a window.

Well, I guess it's ok if it's for a phase change setup:D

I might not, because that's just a little higher than optimal for me (although indoor temp might be a few degrees higher thus warrenting minor cooling (my house has terrible insulation).

BUT! there are many people out there that prefer their houses to be 15C to 20C. So I can see them not enjoying even opening a window to cool down.
post #14 of 16
Quote:
Originally Posted by Chickensevil View Post

Right, but you cannot exceed that 1KW no matter what you try to do, at least not directly from the light itself (the residual heat thing, is actually more of an issue because of wasted energy not already captured by the cell, thus it becomes heat -> ie. wasted energy). The only reason they get the claim of 15x is because they are focusing the light, like a magnifying glass. So if you are measuring the light at the focal point, yeah, it might be that it is 15x the light energy, but if you look at the unaltered capture point it would still be the original 1KW per square foot.

Not sure how this helps anything, unless, it helps overcome the 50% efficiency barrier. Since they are capturing the light in a different manner, maybe they can achieve a theoretical 100% efficiency? If so, then that would be amazing. Going from 130W per square foot to something more like 900W per square foot would be an enormous improvement.

The only issue, is that is still does not detract from the "reliable" aspect of energy and the total failure on light to be reliable. Reliability of solar is already at a 3 to 1 ratio, and you still need backup power on top of that for night time. I am not saying a total no to solar, but we could never hope to make it even remotely close to the market share that say, coal is today... Just from that issue alone. It has a place, and a use, but replacing the world's power source is not it.
I might not, because that's just a little higher than optimal for me (although indoor temp might be a few degrees higher thus warrenting minor cooling (my house has terrible insulation).

BUT! there are many people out there that prefer their houses to be 15C to 20C. So I can see them not enjoying even opening a window to cool down.

You are right due to the way solar power works it will never be one of the main source of power though IMO it has much more potential then say wind for example. Even so many other power sources have limitations too. Nuclear for example can't be used on its own as it can't react to load variations very fast. Hydro can't be used all the time as its seasonal but combine the two so that you use hydro power to load balance and now you got a 24/7 all year reliable output. That's the great thing about dams. You can store up great amounts of potential power to be used when needed.

So there will always be a need for load balancing power but having a larger selection of power generation methods helps reduce the need to run coal or hydro plants for balancing purposes.
Edited by Bit_reaper - 3/30/13 at 3:34am
    
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post #15 of 16
All them numbers - 15x improvement as in, 20->60->80->90->95 - 20% of perpendicular light - zenith is 1004 watts per square meter

Crikey! Just tell me what size panel I need to run a computer with a quad gpu. Thats all I wanna know biggrin.gif
post #16 of 16
Having heard about silicon nanowires years ago, let me say I'll believe it when I see it and - more importantly - can purchase it. I want to believe, but as of yet I DON'T.
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