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Why solar water heating?0 Z# _# m& w+ n: o
Amount of energy used today to heat domestic water is enormous.
4 V, |* p( t) C; J: }' g* q- TCompared to burning of fossil fuels, direct energy from the Sun produces heat: x% ^" P) W1 |) ?3 ]9 K K
that is almost free, environmentally clean and socially more acceptable.
" X# x7 H/ e$ \ Q/ y. `Possible energy savings for hot water in sunnier places are 80 percent or more
: M8 s9 Y9 \( w' a4 rand in cloudiest climates are from 50-60 percents. |
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发表于 2009-8-1 07:05:49
