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Solar Roadways Get DoT Funding
mikee805 writes "Solar Roadways, a project to replace over 25,000 square miles of road in the US with solar panels you can drive on, just received $100,000 in funding from the Department of Transportation for the first 12ft-by-12ft prototype panel. Each panel consists of three layers: a base layer with data and power cables running through it, an electronics layer with an array of LEDs, solar collectors and capacitors, and finally the glass road surface. With data and power cables, the solar roadway has the potential to replace some of our aging infrastructure. With only 15% efficiency, 25,000 square miles of solar roadways could produce three times what the US uses annually in energy. The building costs are estimated to be competitive with traditional roads, and the solar roads would heat themselves in the winter to keep snow from accumulating."
I'm sure they did fairly decent testing with 4 wheel vehicles, but my motorcycle lacks the inherent stability that a car has. How bad would a surface like this be when it gets wet?
My sausage tree didn't grow, does that make me a bad mommy?
How will the oil drippings and the tire residue affect the panel output?
One other problem with concrete is that at the "seams" (not to mention the cracks) between panels water can get through to the ground underneath. This can lead to localized soil expansion/contraction which causes stress on the concrete and accelerates the deterioration. If a lot of water gets through the ground can be unstable enough to allow the panels to "rock" then they don't line up evenly any more. I would think these large glass panels could be susceptible to the same problem.
My old sig was REALLY stoopid.
able to leap tall buildings and being bullet proof...
I am not overly worried about its resilience, I am more worried about how the surface drains water and traction on when wet. Being an avid motorcyclist I dread new roadway compounds because half the time they forget that two wheelers exist. Rubber directional signs applied to road surfaces are already not friendly, I don't need more.
* Winners compare their achievements to their goals, losers compare theirs to that of others.
A much more effective concept is solar roofs. Rather than putting panels on top of roofs, the panels are the roof. This has many advantages. Rather than paying for a roof and solar panels, plus the headaches of attaching panels to a roof, you only pay for one surface. Mounting roof panels to rafters is easier than mounting panels to existing roofs. The wiring is on the inside, where it's in a dry space. The panels behave better in high winds, since winds can't get under them. And you can mix solar panels and plain roof panels, using solar panels only on the surfaces pitched to get the most sun.
Roads are a much tougher environment than roofs.
You should also beware applying your experience with solar cells to to every solar cell. I would probably be willing to put money of the fact that you were working with monocrystalline cells. Yes using monocrystalline cells in this situation would be stupid. But to be honest the people designing these project did not even consider monocrystalline because their advantages/disadvantages do not match this project at all. Amorphous cells on the other hand match the job a lot better. Cheaper more rugged and relying more on large surface area than high efficiency.
The problem is that you need about 30,000 square miles of solar panels, at current efficiencies of about 14%, to solve the problem. There are apparently only about 500,000 acres of rooftop. If these guys shoot for "solar roadway" and miss by a fair bit, they might wind up with "solar parking lot", which would solve a bigger chunk of the problem than "solar rooftops" could.
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