Aug 21, 2016 5:29 PM GMT
metta saidSilent Rooftop Wind Turbines Could Generate Half Of A Household’s Energy Needs…
Art_Deco saidmetta saidSilent Rooftop Wind Turbines Could Generate Half Of A Household’s Energy Needs…
That's somewhat like an Archimedes Screw. But solar does not have to be electrical, another source of free energy.
My sister has a solar water heater on her roof. Great in Florida. Her pool filter pump, which runs anyway, circulates water up there. The water heats directly in the sunlight before it returns, keeping her pool at a nice temp year-round. No electricity involved. Simple and highly efficient, only a little extra energy needed for a stronger pump to raise the water. But then it siphons back down with gravity, so still very efficient.
Some people use this method to heat their house hot water, or supplement other heating means, and also for heating with radiators for interior warmth. There are many ways for homeowners to use solar & wind to lower ultility costs.