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Posted to alt.home.repair,alt.solar.thermal,alt.energy.homepower,misc.consumers.frugal-living
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GFX vs home brew
Robert Gammon wrote
Rod Speed wrote
Robert Gammon wrote
wrote:
A 200' version makes 82%...
But that's pretty big. How about this?
We collect all the shower water in a tank, with an infinite cold
water tank next to it, then circulate the cold water through a coil
in the shower tank until it all cools to the cold water temp...
Then again, infinite tanks are hard to come by.
So maybe mix hot and cold fresh water to 90 F and circulate that
through the coil until the shower tank drops from 100 to 95, then
pump some of the 95 F fresh water back into the hot water tank and
add enough
cold fresh water to make the fresh mix 85, then circulate for a
while, then pump some 90 F fresh water back into the hot water tank
and add enough cold water to make the fresh mix 80, and so on. How
can we do this automatically, on a continuous basis? We need a 20
gallon expansion tank too. Lots of pumping, but little energy, if the
hot and cold supplies stay pressurized.
At some point the water needs to be heated to about 140F to kill
bacteria before use in showers and baths.
No it doesnt.
Do a little research and you will find that Canada HAS such a spec.
More fool canada. You cant ignore chlorination.
Read about it today searching for the valve (Tempering Valve) that
mixes hot water with cold to prevent scalding. Their spec says that
hot water heaters must attain a temp of at least 60C (about 140F) in
order to kill this bacteria, and that water heaters can frequently
output 75C water (about 167F) Scalding occurs (and I was a victim of
this at about age 4) most often in households that draw a bath using
solely Hot water, then temper with cold to get the desired temp. I
was impatient to get my bath that night, and due to the arrangement
of water controls and my size, I could not reach the cold water
control without climbing around the lip of the tub. Needless to ay,
I slipped and dropped my foot into the HOT water. My ankle bone was
VISIBLE thru the skin for several days after that.
Separate matter entirely.
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