- This topic has 75 replies, 9 voices, and was last updated 15 years, 3 months ago by briansd1.
-
AuthorPosts
-
August 5, 2009 at 8:07 AM #441147August 5, 2009 at 8:17 AM #441733anParticipant
[quote=ucodegen]
Already here.. Sun Tech Power.. Efficiency will always be a problem. The ‘window’ types will be less efficient because they are passing through light that might normally be converted.[/quote]
I wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers. We’ll get to a point where it’ll be much much cheaper and even the cheapest product will be able to satisfy most people’s needs. It was only about 10 years ago where a color scanner was $1000, now it’s <$100. It was only about 10 years ago where we were using 166MHz CPU w/ hard drive space around 80MB. Now, we're talking about 3GHz CPU and 2TB. I full expect solar tech to have the same exponential improvements.August 5, 2009 at 8:17 AM #440958anParticipant[quote=ucodegen]
Already here.. Sun Tech Power.. Efficiency will always be a problem. The ‘window’ types will be less efficient because they are passing through light that might normally be converted.[/quote]
I wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers. We’ll get to a point where it’ll be much much cheaper and even the cheapest product will be able to satisfy most people’s needs. It was only about 10 years ago where a color scanner was $1000, now it’s <$100. It was only about 10 years ago where we were using 166MHz CPU w/ hard drive space around 80MB. Now, we're talking about 3GHz CPU and 2TB. I full expect solar tech to have the same exponential improvements.August 5, 2009 at 8:17 AM #441489anParticipant[quote=ucodegen]
Already here.. Sun Tech Power.. Efficiency will always be a problem. The ‘window’ types will be less efficient because they are passing through light that might normally be converted.[/quote]
I wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers. We’ll get to a point where it’ll be much much cheaper and even the cheapest product will be able to satisfy most people’s needs. It was only about 10 years ago where a color scanner was $1000, now it’s <$100. It was only about 10 years ago where we were using 166MHz CPU w/ hard drive space around 80MB. Now, we're talking about 3GHz CPU and 2TB. I full expect solar tech to have the same exponential improvements.August 5, 2009 at 8:17 AM #441157anParticipant[quote=ucodegen]
Already here.. Sun Tech Power.. Efficiency will always be a problem. The ‘window’ types will be less efficient because they are passing through light that might normally be converted.[/quote]
I wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers. We’ll get to a point where it’ll be much much cheaper and even the cheapest product will be able to satisfy most people’s needs. It was only about 10 years ago where a color scanner was $1000, now it’s <$100. It was only about 10 years ago where we were using 166MHz CPU w/ hard drive space around 80MB. Now, we're talking about 3GHz CPU and 2TB. I full expect solar tech to have the same exponential improvements.August 5, 2009 at 8:17 AM #441561anParticipant[quote=ucodegen]
Already here.. Sun Tech Power.. Efficiency will always be a problem. The ‘window’ types will be less efficient because they are passing through light that might normally be converted.[/quote]
I wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers. We’ll get to a point where it’ll be much much cheaper and even the cheapest product will be able to satisfy most people’s needs. It was only about 10 years ago where a color scanner was $1000, now it’s <$100. It was only about 10 years ago where we were using 166MHz CPU w/ hard drive space around 80MB. Now, we're talking about 3GHz CPU and 2TB. I full expect solar tech to have the same exponential improvements.August 5, 2009 at 8:33 AM #441743ucodegenParticipantI wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers.
Not really. The reason why has to do with quantum physics. Each photon (quanta of light) has energy that is proportional to its frequency (hv with h being Planck’s constant and v being the frequency of that particular color of light). Sunlight has several ‘colors’ of light within it, therefore several different energies. Additionally each of these photons of different energies will yield a different voltage when converted to electricity. The last sentence is why it is not possible to go too much further in efficiencies. With a pair of wires, only one voltage can be generated. This means that photons with energies below the threshold (output voltage – barrier voltage) will be reflected or turned into heat. Photons with higher energies will convert to electricity but the energy above the conversion energy will be converted to heat.
There have been attempts to fix this with multi-layer, multi-tap solar cells, but these also have issues.
Moores law does not apply to everything.
August 5, 2009 at 8:33 AM #441571ucodegenParticipantI wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers.
Not really. The reason why has to do with quantum physics. Each photon (quanta of light) has energy that is proportional to its frequency (hv with h being Planck’s constant and v being the frequency of that particular color of light). Sunlight has several ‘colors’ of light within it, therefore several different energies. Additionally each of these photons of different energies will yield a different voltage when converted to electricity. The last sentence is why it is not possible to go too much further in efficiencies. With a pair of wires, only one voltage can be generated. This means that photons with energies below the threshold (output voltage – barrier voltage) will be reflected or turned into heat. Photons with higher energies will convert to electricity but the energy above the conversion energy will be converted to heat.
There have been attempts to fix this with multi-layer, multi-tap solar cells, but these also have issues.
Moores law does not apply to everything.
August 5, 2009 at 8:33 AM #441167ucodegenParticipantI wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers.
Not really. The reason why has to do with quantum physics. Each photon (quanta of light) has energy that is proportional to its frequency (hv with h being Planck’s constant and v being the frequency of that particular color of light). Sunlight has several ‘colors’ of light within it, therefore several different energies. Additionally each of these photons of different energies will yield a different voltage when converted to electricity. The last sentence is why it is not possible to go too much further in efficiencies. With a pair of wires, only one voltage can be generated. This means that photons with energies below the threshold (output voltage – barrier voltage) will be reflected or turned into heat. Photons with higher energies will convert to electricity but the energy above the conversion energy will be converted to heat.
There have been attempts to fix this with multi-layer, multi-tap solar cells, but these also have issues.
Moores law does not apply to everything.
August 5, 2009 at 8:33 AM #441499ucodegenParticipantI wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers.
Not really. The reason why has to do with quantum physics. Each photon (quanta of light) has energy that is proportional to its frequency (hv with h being Planck’s constant and v being the frequency of that particular color of light). Sunlight has several ‘colors’ of light within it, therefore several different energies. Additionally each of these photons of different energies will yield a different voltage when converted to electricity. The last sentence is why it is not possible to go too much further in efficiencies. With a pair of wires, only one voltage can be generated. This means that photons with energies below the threshold (output voltage – barrier voltage) will be reflected or turned into heat. Photons with higher energies will convert to electricity but the energy above the conversion energy will be converted to heat.
There have been attempts to fix this with multi-layer, multi-tap solar cells, but these also have issues.
Moores law does not apply to everything.
August 5, 2009 at 8:33 AM #440968ucodegenParticipantI wouldn’t say it will always be a problem. Right now, the efficiency is in the teens and twenties. I think, when solar tech matures, we’ll get much higher efficiency numbers.
Not really. The reason why has to do with quantum physics. Each photon (quanta of light) has energy that is proportional to its frequency (hv with h being Planck’s constant and v being the frequency of that particular color of light). Sunlight has several ‘colors’ of light within it, therefore several different energies. Additionally each of these photons of different energies will yield a different voltage when converted to electricity. The last sentence is why it is not possible to go too much further in efficiencies. With a pair of wires, only one voltage can be generated. This means that photons with energies below the threshold (output voltage – barrier voltage) will be reflected or turned into heat. Photons with higher energies will convert to electricity but the energy above the conversion energy will be converted to heat.
There have been attempts to fix this with multi-layer, multi-tap solar cells, but these also have issues.
Moores law does not apply to everything.
August 5, 2009 at 8:37 AM #441748CoronitaParticipantWhat is the life expectancy of a good solar panel? Just curious. 10 years or is it more?
August 5, 2009 at 8:37 AM #441172CoronitaParticipantWhat is the life expectancy of a good solar panel? Just curious. 10 years or is it more?
August 5, 2009 at 8:37 AM #441576CoronitaParticipantWhat is the life expectancy of a good solar panel? Just curious. 10 years or is it more?
August 5, 2009 at 8:37 AM #441504CoronitaParticipantWhat is the life expectancy of a good solar panel? Just curious. 10 years or is it more?
-
AuthorPosts
- You must be logged in to reply to this topic.