Solar Roadways
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firebroad
Minister of Fire
Various media reports indicate that the slick video has gotten 1.5 million in contributions by crowd sourcing. Beyond enriching a few folks pockets, I dont see this going anywhere. There is some basic physics that make it impractical. I too would think that investing in solar roofs on roofs with appropriate solar exposure is going be a far biggest bang for the buck.
CombatChris
Member
Adios Pantalones
Minister of Fire
I think this involves way more challenges than rewards.
You need to maintain a proper coefficient of friction- any wear and it becomes a slick surface to drive on.
The roughness will cause more diffraction/reflection issues and reduce efficiency.
Any dirt/leaves/skid marks etc will really screw up efficiency. You don't notice when a road has a bit of dirt on it, but a clear transmitting surface...
The idea of melting snow only violates a couple of the laws of physics, unless you store energy or draw it from elsewhere: it will never melt snow by itself better than a simple black surface will by solar gain. Also- you would need to install heaters.
I could go on, but this one is better power point/meme engineering than a practical solution. Using roadside areas for regular panels would be much easier, cheaper, more efficient, and available in shorter term.
You need to maintain a proper coefficient of friction- any wear and it becomes a slick surface to drive on.
The roughness will cause more diffraction/reflection issues and reduce efficiency.
Any dirt/leaves/skid marks etc will really screw up efficiency. You don't notice when a road has a bit of dirt on it, but a clear transmitting surface...
The idea of melting snow only violates a couple of the laws of physics, unless you store energy or draw it from elsewhere: it will never melt snow by itself better than a simple black surface will by solar gain. Also- you would need to install heaters.
I could go on, but this one is better power point/meme engineering than a practical solution. Using roadside areas for regular panels would be much easier, cheaper, more efficient, and available in shorter term.
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Adios Pantalones
Minister of Fire
Here's a guy that just loves to go on about these things. http://www.drroyspencer.com/2014/05/solar-roadways-project-a-really-bad-idea/
http://www.drroyspencer.com/2014/05/why-are-solar-freakin-roadways-so-freakin-popular/
http://www.drroyspencer.com/2014/05/why-are-solar-freakin-roadways-so-freakin-popular/
My first reaction was . . . cool, but what about friction issues? I'd like to see what the watt rating is for each section after it is covered with tempered glass. I suspect it is pretty low. Obviously they want to make up for that with quantity vs quality.
I would like to see limited application as a field test . . . parking lots, driveways.
Obviously there are a lot of gaps. Pollen would be a minimal issue, but dirt probably wouldn't be. I wonder how many are wired together in a string and what that would do to cost if each section or large area essentially had microinverters vs. a really large strong inverter.
I showed the video to my environmental science students. Although they are young and optimistic, they pointed out cost issues; friction; ice melting energy; debris, trash, and oil spotting loss, and melted snow refreezing and blocking the drain channels just in the first two minutes of discussion.
I would like to see limited application as a field test . . . parking lots, driveways.
Obviously there are a lot of gaps. Pollen would be a minimal issue, but dirt probably wouldn't be. I wonder how many are wired together in a string and what that would do to cost if each section or large area essentially had microinverters vs. a really large strong inverter.
I showed the video to my environmental science students. Although they are young and optimistic, they pointed out cost issues; friction; ice melting energy; debris, trash, and oil spotting loss, and melted snow refreezing and blocking the drain channels just in the first two minutes of discussion.
Adios Pantalones
Minister of Fire
semipro
Minister of Fire
Agreed. But its far easier to tear down by finding fault than it is to create.
But then, I'm an engineer who shares the sentiment expressed in this quote. I hope the attribution to Einstein is accurate.
`Scientists investigate that which already is;
Engineers create that which has never been.''
Albert Einstein
Adios Pantalones
Minister of Fire
Not sure I agree with ole Al. A scientist creates- usually just to prove a point.
A scientist builds in order to study, an engineer studies to build. Can't remember the source, but I think it's far more accurate.
Now, with the increasing proliferation of unrefereed online publication and incredibly shoddy work, the public believes lies more than ever.
Adios Pantalones
Minister of Fire
By the way, I think that Einstein's quote was just exhibiting humility. The man was granted something like 50 patents. If scientists did not create something new, then patents would not be issued to them.
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firebroad
Minister of Fire
WONDERFUL idea, get those young minds thinking, they will find the solutions.
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