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Why solar water heating?
* m7 q8 N4 }: I5 U- ]/ ^3 qAmount of energy used today to heat domestic water is enormous.
- u) j, I+ l8 Z& m- ^8 |Compared to burning of fossil fuels, direct energy from the Sun produces heat
& {5 I4 }% p2 U( K' @7 E( ], bthat is almost free, environmentally clean and socially more acceptable.
) l6 K5 J9 s8 @+ c& b# E* m' [* NPossible energy savings for hot water in sunnier places are 80 percent or more9 h2 S+ @1 a, q+ q, q: a; E
and in cloudiest climates are from 50-60 percents. |
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发表于 2009-8-1 07:05:49
