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Heat from the Shower Drain
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23
comments (23 topical, editorial)
Re: Heat from the Shower Drain
(
3.00 / 0
) (
#16
)
by desertcoyote on Sun Dec 16th, 2007 at 10:54:21 AM MST
(
User Info
)
I am not buying the vertical pipe method of heat transfer. And 50% recovery in this type of mode is not realistic, not at all. Maybe with capillary tubes in a laboratory under ideal conditions. Drains get coated with scum, hair soap... that alone would kill the thermal impedance and the idealized notion of the water spinning on the outside. It would be a fun physics problem to come up to a steady state solution assuming that the incoming water is getting heated by a percentage of the heat going down the drain. The most practical is the bath tube, let the water stand and cool down to the ambient. Otherwise letting the water flow into a plastic 55 gallon drum thereby heating the crawl space or basement could be workable. Entropy happens, .... use less hot water, take shorter showers!
[
Parent
]
Re: Heat from the Shower Drain
(
3.00 / 0
) (
#17
)
by ghurd on Sun Dec 16th, 2007 at 11:28:08 AM MST
(
User Info
)
The PDF says 25 to 31% over 1 year in a real life test.
"Make", not buy.
[
Parent
]
Heat from the Shower Drain
|
23
comments (23 topical, 0 editorial)
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