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re: inexpensive solar panel.
14 jan 2004
muhammad's radio wrote:
>i am thinking of building a summer vacation place and want hot water
>to be solar. it would be in eastern washington, and gets a fair
>amount of sun @48 degrees latitude?
>
>i would like to build a small house with a 45 deg roof facing south
>out of corrugated aluminum and make the 'colector' out of black drip
>irrigation hose (i believe 3/8")...
you may not need the hose or transparent cover in summertime. otoh,
you might make hot water and space heat and electricity year round in
a solar attic with a fresnel knee wall and a 4' wide draindown poly film
duct over some standard pv panels on the attic floor.
>i may make a concrete tank (probably 100-200 gallons) and use coiled
>1" copper pipe (around 30') for heat transfer to incoming cold.
i'd say more storage, eg a 4'x8'x2' tall epdm-lined plywood box
containing a 42 gallon bare pressurized tank as a heat exchanger.
or put the box upstairs with no heat exchanger for less collector
pumping power and gravity feed for the shower.
nick
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