Solar Power Roof System
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physics. please. I need brief but complete answers.?
How can solar energy be used for heating?
What are the advantages of using lenses or mirrors in systems that collect solar energy?
In which area or region (polar or equatorial region) can benefit most from the application of solar energy? Why?
Measuring solar power.
How can you measure the local power output from the nearest continuous running fusion reactor, the sun?
You are planning to install 15 sq. meters of solar cell on your roof. How much power will you expect them to produce?
Relating color and radiation absorption
What color absorbs infra red radiation best?
If you wanted the roof of your house to absorb the sun’s radiation to help heat your house, would you buy black or white shingles?
What color shingles would you buy if you lived in a climate that was always sunny and warm?
Reflections
How does the angle at which light strikes a minor compare with the angle at which the same light is reflected?
How can solar energy be used for heating?
Water can be pumped through solar panels that collect heat energy from the sun. Often these are mounted directly on the roof of homes at an angle approximately equal to the latitude. It is pointed South in the Northern hemisphere and North in the Southern hemisphere.
What are the advantages of using lenses or mirrors in systems that collect solar energy?
By focusing the light you can increase the temperature of the water. The water can be used with less water pumped and it can even get hot enough to generate electricity through a steam generator.
In which area or region (polar or equatorial region) can benefit most from the application of solar energy? Why?
Equatorial regions benefit most, because a smaller surface area is required to collect equivalent energy. A smaller surface energy means less cost.
Measuring solar power.
How can you measure the local power output from the nearest continuous running fusion reactor, the sun?
Voltage output from a PV cell on a clear day.
You are planning to install 15 sq. meters of solar cell on your roof. How much power will you expect them to produce?
10 sq ft can produce about 125 watts
15 sq ft is about 188 watts.
But on cloudy days and at Northern latitudes and Winter it will be less.
The most efficient solar panels PV are about 15% of the light energy. It works more efficiently on sunny days, and will not generate power at night.
Relating color and radiation absorption
What color absorbs infra red radiation best?
Black.
If you wanted the roof of your house to absorb the sun’s radiation to help heat your house, would you buy black or white shingles?
Black
What color shingles would you buy if you lived in a climate that was always sunny and warm?
White to reflect the unwanted heat.
Reflections
How does the angle at which light strikes a mirror compare with the angle at which the same light is reflected?
The reflection of light on a mirror is the same angle relative to the surface of the mirror (in the opposite direction of course).
3 Solar Panels Installed on Roof.. Solar Panel view #3
