Yes, and they deliberately use high e glass to shed heat.They are also bifacial so instead of a somewhat insulating white material on the back it is glass which easily transfers the heat.
Yes, and they deliberately use high e glass to shed heat.They are also bifacial so instead of a somewhat insulating white material on the back it is glass which easily transfers the heat.
There is no grid to sell your excess hot water to.Hydro Solar has panels that take the excessive heat and put it into your domestic hot water tank.
Just like renewable credits for PV SRCs there is a market for renewable credits for thermal heat generated, called TRCs.There is no grid to sell your excess hot water to.
Might be a great idea for a laundromat.
I don't understand this part. ., whereas ground mount solar panels add heat to the planet.
I do. What would you measur though?Anybody got a spectrophotometer handy?
Raises albedo, potentially.I don't understand this part. .
What about insulating the roof enough so that the heat preferentially goes up instead of down?
By a lot.Does the electricity generated * cooling COP exceed the worse albedo? Most likely, otherwise rooftop solar would never work for powering AC
I'm saying i don't think albedo cools or heats the planet. The energy coming from the sun, is the energy coming from the sun. If some gets reflected where does it go?Raises albedo, potentially.
It depends on the type of terrain the panels are put on. If it’s going over asphalt parking lot, it’s definitely a net win I think without bringing GHG displacement into the convo
Desert? Probably a net loss. But it also displaces GHG
My understanding is that if using bi-facial they only work if the material behind is white.If the roof has slope and you have a few inches of space under the panels, it will start a convective current through there and siphon the heat out the top. A breeze can also act on that setup.
Down tight to the surface is bad for the panels, they groove on cooler temperatures.
Albedo definitely cools or heats the planet. At least, that’s what I learned from playing SimEarth and watching geology videos. It can be a positive cooling feedback loop — ie if earth freezes solid with icecaps albedo is at like .9 and it has a hard time thawing out.I'm saying i don't think albedo cools or heats the planet. The energy coming from the sun, is the energy coming from the sun. If some gets reflected where does it go?
Right, so the folks on this thread thinking that these results say solar is a bad idea bc it heats your house need to reevaluate.By a lot.
Yeah the difference between white roof vs solar panels is not enough to matter. In either case the shed requires ac lolRight, so the folks on this thread thinking that these results say solar is a bad idea bc it heats your house need to reevaluate.
It depends on the color of the roof doesn't it?Solar on the roof doesn’t provide much shade cooling. Counterintuitive. Makes ground mount more appealing.
And if it is a metal roof. Metal roofs are far better at reflecting heat from sun then asphalt shingles.It depends on the color of the roof doesn't it?
That's only because of their color though. A dark metal roof is going to have about the same absorption as a dark shingle roof if the Solar Reflective Index (SRI) is the same, since emissivity is similarAnd if it is a metal roof. Metal roofs are far better at reflecting heat from sun then asphalt shingles.
Stick with it. Don't confuse "shade" with temperature. Sunlight and UV tears up plastics on a car. Blocking sunlight is going to be a net win, with adequate ventilation vs direct sunlight.Dang.
I’ve had this multi year obsession with putting panels on my cabin for shade. So many hours of research into micro inverters and roof mounted string inverters. I was even contemplating putting dead panels up there just to get some cooling.
All to get the old Land Rover safari shaded roof thing going.
Gonna be hard to let the dream go.
I do. What would you measur though?
They are also bifacial so instead of a somewhat insulating white material on the back it is glass which easily transfers the heat.