# pool water heating

Discussion in 'Home Power and Microgeneration' started by Guest, Oct 7, 2004.

1. ### GuestGuest

I'm looking for some help developing an idea for a new way to heat the pool.
The "panels on the roof" idea works, as does laying miles of black poly.
But they look messy & unattractive.

One idea I'm playing with is to use the pool deck area.
What if the concrete deck was "hollow", and water flowed through it?
Could have foam under to stop heat loss.

Another idead: What if the "deck" was some sort of poly material & water
flowed under it. (but poly might be slippery??)
Glass would work, but would be very expensive.

Anyhow any ideas / thoughts appreciated.

2. ### davidGuest

you may try and build a mother earth waste oil heater and maybe wrap some large
copper pipe around it and use some kind of pump like a small sump pump to
surculate the water

3. ### Guest

That sounds difficult. How about painting the deck with a dark non-porous
paint, and periodically making water flow from a pipe with some holes near
the deck perimeter back into the pool? You might make it flow whenever the
deck temp reaches 120 F. I think this would work better than a continuous
flow, which would lose more heat by evaporation.

Nick

4. ### SQLitGuest

Bury your miles of black poly in the cool deck ear the surface. Hollow
concrete would be to hard to do and probably screw with the chemical balance
of the water

5. ### Guest

How warm can we keep a 24'x32' pool with a 4' wide deck and an R1 cover with
90% solar transmission in February in Phila, when 870 Btu/ft^2 of sun falls
on the ground on an average 33.0 F day, with w = 0.0027?

With no deck, a square foot of pool surface would collect 0.9x870 = 783
Btu/day and lose 24h(T-33.0)1ft^2/R1, which makes T = 33+783/24 = 65.6 F.

What's the max pool temp, using the deck?
This may be an existing pool.
Flood the deck at night.

Nick

6. ### Guest

How warm can we keep a 24'x32' pool with a 4' wide deck and an R1 cover with
With the cover over the deck, 0.9(870)1248ft^2=(T-33)(24hx768+6hx480)/R1,
so T = 33+977.2K/21312 = 78.9 in Feb and 46.4+763.8K/21312 = 82.2 in Nov.

Nick