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Q..WRITE 10 POINTS ABOUT SOLAR RADIATION.
Answers
Solar radiation reaches earth's surface as (1) direct (beam) solar radiation, (2) diffuse solar radiation, and (3) reflected radiation, which can be neglected. The total radiation received from the sun, of a horizontal surface at the level of the ground for a serene day, is the sum of the direct and diffuse radiations. Direct radiation depends on the orientation of receiving surface. Diffuse radiation can be considered the same, irrespective of the receiving surface orientation, although in reality there are small differences. Fig. 2.5 represents the proportion of the diffuse radiation in total radiation IT [8].
Attenuation of the solar rays is determined by the composition of the atmosphere and the length of the atmospheric path through which the rays travel. The path length is expressed in terms of the air mass m, which is the ratio of the mass of atmosphere in the actual earth–sun path to the mass that would exist if the sun was directly overhead at sea level (m = 1). Beyond the earth's atmosphere, m = 0. For zenith angles θz ∈ [0 degree, 70 degrees] at the sea level, to a close approximation, m = 1/cosθz.
Answer:
1) As heat for making hot water, heating buildings and cooking.
2) To generate electricity with solar cells or heat engines.
3) To take the salt away from sea water.
4) To use sun rays for drying clothes and towels.
5) It is used by plants for the process of photosynthesis.
6) Solar Energy is cheaper than fossil fuels
7) Solar panels can produce power without direct sunlight
8) A Solar-powered home can reduce CO2 emissions by 100 tons within 30 years.
9) Solar Power Can fuel Airplanes
10) Solar panels produce approximately 10 Kilowatts of energy per square foot.
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