- #1
cwinhall
- 6
- 0
Hi all,
I live in Perth, Australia and have just moved houses to a place with a relatively small pool, unfortunately it is shaded for the majority of the day by a big tree and it is quite cold and unwelcoming (unless you have built of a sweat).
I want to make a solar pool heating system to bring the temperature of the pool up by about 4C using submersible pumps and poly tube piping.
Now I've already done a basic system for this already with this pump (http://www.bunnings.com.au/products_product_pump-submers-clean-commer-elec-550w-15500lhr-pcw550_P4813554.aspx?search=pump&searchType=any&searchSubType=products&page=2) and 100 metres of 13mm poly tubing coiled and held in place on a 2x4 plank. With 10m hose pipe feeding from the pool to the piping and then a 2nd 10m hose pipe feeding from the piping back to the pool. (these hoses are not getting direct sunlight and are not black)
At mid day this system is getting a 7C gain in temperature from the intake to the output. and is pumping at a rate of 240L an hour.
(The pump is rated at pumping 15,500L/H - is mine being so severely reduced due to using 13mm poly pipe? --- And what would be best? Higher volume with lesser temperature gain or lower volume and higher temperature gain?)
The pool is a free form shaped pool where I have estimated the volume to be around 52,000 litres.
Now obviously my current setup is no where near enough to heat the pool at all, as the 7C gain from the system is dissipated almost immediately by the share volume of water in the pool of cold water.
How could I optimize my system to get the most gain efficiently. Presumably just increasing the amount of piping won't help that much because there won't be enough water circulating to make a difference.
How about 3 pumps all in separate locations of the pool each working on 200m of poly piping?
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Secondly, instead of just poly piping, as an alternative I have been tying with the idea of using a fresnel lens where it heats some copper pipes after passing through the initial heating from the poly tubing. This would make the heat gain back into the pool incredibly higher, but would it still dissipate too quickly due to the large volume of the pool?
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Thirdly, I have also been toying with the idea of having some copper piping running side by side, layered, sitting on top of the Gas BBQ grill, with a similar submersible pump and piping leading to it and back to the pool. Presumably the heat gain would be tremendous but obviously there is a large cost in running this compared to free solar energy :)
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I look forward to hearing everyone's suggestions for this project.
I have seen a lot of these projects online in my research but most of the systems are just for small pools not large ones and I feel there isn't a good solution to this yet for large pools.
Thanks for reading! :)
I live in Perth, Australia and have just moved houses to a place with a relatively small pool, unfortunately it is shaded for the majority of the day by a big tree and it is quite cold and unwelcoming (unless you have built of a sweat).
I want to make a solar pool heating system to bring the temperature of the pool up by about 4C using submersible pumps and poly tube piping.
Now I've already done a basic system for this already with this pump (http://www.bunnings.com.au/products_product_pump-submers-clean-commer-elec-550w-15500lhr-pcw550_P4813554.aspx?search=pump&searchType=any&searchSubType=products&page=2) and 100 metres of 13mm poly tubing coiled and held in place on a 2x4 plank. With 10m hose pipe feeding from the pool to the piping and then a 2nd 10m hose pipe feeding from the piping back to the pool. (these hoses are not getting direct sunlight and are not black)
At mid day this system is getting a 7C gain in temperature from the intake to the output. and is pumping at a rate of 240L an hour.
(The pump is rated at pumping 15,500L/H - is mine being so severely reduced due to using 13mm poly pipe? --- And what would be best? Higher volume with lesser temperature gain or lower volume and higher temperature gain?)
The pool is a free form shaped pool where I have estimated the volume to be around 52,000 litres.
Now obviously my current setup is no where near enough to heat the pool at all, as the 7C gain from the system is dissipated almost immediately by the share volume of water in the pool of cold water.
How could I optimize my system to get the most gain efficiently. Presumably just increasing the amount of piping won't help that much because there won't be enough water circulating to make a difference.
How about 3 pumps all in separate locations of the pool each working on 200m of poly piping?
--------------------------------------------------------------------
Secondly, instead of just poly piping, as an alternative I have been tying with the idea of using a fresnel lens where it heats some copper pipes after passing through the initial heating from the poly tubing. This would make the heat gain back into the pool incredibly higher, but would it still dissipate too quickly due to the large volume of the pool?
--------------------------------------------------------------------
Thirdly, I have also been toying with the idea of having some copper piping running side by side, layered, sitting on top of the Gas BBQ grill, with a similar submersible pump and piping leading to it and back to the pool. Presumably the heat gain would be tremendous but obviously there is a large cost in running this compared to free solar energy :)
---------------------------------------------------------------------
I look forward to hearing everyone's suggestions for this project.
I have seen a lot of these projects online in my research but most of the systems are just for small pools not large ones and I feel there isn't a good solution to this yet for large pools.
Thanks for reading! :)