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Why solar water heating?- n) X i) n0 ]" o3 l# U
Amount of energy used today to heat domestic water is enormous.) ~0 t5 _2 p" l d) a
Compared to burning of fossil fuels, direct energy from the Sun produces heat
* T# U$ Q9 |; Lthat is almost free, environmentally clean and socially more acceptable.& a9 I% N, I' F" w/ n* u, U
Possible energy savings for hot water in sunnier places are 80 percent or more
) D ?4 m$ z* s' c6 yand in cloudiest climates are from 50-60 percents. |
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发表于 2009-8-1 07:05:49
