Why solar water heating?& B2 C0 |7 q. u$ d* A2 n
Amount of energy used today to heat domestic water is enormous.$ U a/ ^* I. F6 ~2 } |% X$ H9 n5 ?
Compared to burning of fossil fuels, direct energy from the Sun produces heat Y& E5 z# a @that is almost free, environmentally clean and socially more acceptable. ( a! D P1 X. o5 d; yPossible energy savings for hot water in sunnier places are 80 percent or more: M; y8 `1 R5 g4 l- b/ J3 `& _
and in cloudiest climates are from 50-60 percents.
发表于 2009-8-1 07:05:49
