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Don't forget that rooftop solar panels reduce HVAC cooling needs in summer, and I would bet they also slash blackbody radiation, reducing the greenhouse problem
by sliverstorm 10y ago
Don't forget that rooftop solar panels reduce HVAC cooling needs in summer, and I would bet they also slash blackbody radiation, reducing the greenhouse problem. Absorbing the light ought to be as good as reflecting it.
a 93-square-metre (1,000 sq ft) white roof will offset 10 tons of carbon dioxide over its 20-year lifetime.
https://en.wikipedia.org/wiki/Reflective_surfaces_(geoengineering) https://en.wikipedia.org/wiki/Reflective_surfaces_(geoengine...
- stcredzero 10y agoExcept, unless you are powering a laser pointed offworld, most of that energy is going to end up in your local environment as heat. Or, you meant just your house's greenhouse problem? Running a heat pump or AC would do that.
- sliverstorm 10y agoI'm not enough of an environmental physicist type to know for sure, but I think warm air (produced by various electronics) is preferable to a hot roof emitting blackbody radiation (which radiates at the wavelength that greenhouse gasses absorb).
- gridspy 10y agoFrom a green house global warming perspective, we want as much light (and heat) reflected back into space as possible right now.
- deleted 10y ago[deleted]
- icebraining 10y agoYes, but the energy that gets converted into heat is replacing energy that would have come from some other source (fossil or not) that now doesn't have to be consumed.
- deleted 10y ago[deleted]
- ricardobeat 10y agoThe heat pump/AC will run on what? If that energy comes from fossil fuels...
- stcredzero 10y agoRunning a the AC with solar, as mentioned in the post I was replying to.