If you are using a small diameter pipe and there is a lot of it the friction between the water and the pipe may be enough to stop the water flowing just from gravity therefore you either need bigger pipe or a method of forcing the water through under pressure. e.g. a header tank or a pump
-- Edited by tezza on Thursday 15th of August 2013 08:58:42 AM
magraret said
03:07 PM Aug 15, 2013
hi all
my husband wants to heat the pool so we can swim earlier
we put pipping on the roof which we did and run it into the pool
we were hoping that the law of gravity would work you pump water in one end and it comes out the other end
well it has not worked we have got rid of all the air in the pipes and when we pull the hose out it wont run
so how can we fix it to work , what are we doing wrong and it seems we may need a pump
brickies said
03:27 PM Aug 15, 2013
Are you saying you are trying to make the water go from the pool to your roof without using a Pump if so this is not possible
Rip and Rosie said
03:53 PM Aug 15, 2013
The basic physics would help.
How big is the pool, how many litres of water do you need to heat, and how high is your roof?
If you want to heat a few litres for a paddle pool using the roof of your van, you need a small pump.
If you want to heat enough water for a 20 metre pool using the roof of your multi story house, you need a professional system.
Roving-Dutchy said
04:15 PM Aug 15, 2013
The pool filter pump can be used to send the water around the heating system, go to your pool supplies shop and they will probably be able to supply the fittings that you need, otherwise buy a small pool pump to pump the water around.
Solar pool heating is not much good until the nights are no longer cool as all the heat you put into the pool water during the day gets lost during the night.
The best you can hope for with a good solar system is about an extra month or two extension of you normal swimming season.
Cheers
David
Yuglamron said
04:58 PM Aug 15, 2013
An old friend used to get six or eight black garbage bags and fill them in the pool and seal them up and leave them in the pool.
His logic was that the sun would heat the water in the black bags and keep the pool a few degrees warmer.
I honestly don't know if it works but he swore by it.
The logic is there though with the solar showers, with the sun heating the shower bag.
brickies said
05:10 PM Aug 15, 2013
A friend put a roll of black poly pipe on his roof of his house hooked up to pool pump and would run the pump in the day time in winter to warm up the pool , And run the pump in the night time in summer to cool down the pool , But did not make a great difference in winter but did work when water got to hot in summer.
Delta18 said
06:14 PM Aug 15, 2013
When we had a pool years ago I had the "bubble wrap" type pool cover which worked incredibly well as a heater during the day
and an insulator at night to keep the warmth in.
It is also very efficient at killing grass (weeds) if left spread out on a lawn too long on a hot day! DAMHIK.
Cheers Neil
magraret said
07:09 PM Aug 15, 2013
thats what we have done put poly pipe up and thought gravety would do the rest now we have to figure what type if pump do we use
brickies said
08:10 PM Aug 15, 2013
Margaret if your pool has a pump you can use it but would have to be plumb into the system
magraret said
08:59 PM Aug 15, 2013
we have a pump for the pool but dont wantto do it that way we have done all the piping from the roof to the pool so would need a seperate pump as they say bugger b
brickies said
09:19 PM Aug 15, 2013
Water find it's own level , It will run down hill but can't run up hill without a pump
miroku12g said
01:05 AM Aug 16, 2013
Margraret,
Depending on if you have an Highset or lowset house depends on the pump size [H.P] You will need to ask yourself how many sunny daylight hours you get during the day? To run a pump 8 hrs to gain 3 - 4 deg in water temp to the cost of power to run that pump ? you may be lucky to get an extra 3 to 4 weeks extra swimming, is that worth the extra cost in power ? your pool pump can divert water to your solar blanket on the roof with a 3 way valve fitted & a None-return valve to stop the water draining back down to the pump, which could make the impeller spin of the shaft.
Forget the black poly pipe, rubbish, will never work to a decent temp to swim, a good solar blanket on the roof will cost around $5,000 [depending on pool size] life time before leaks start to appear 5 yrs, + the running costs of you pump. There are only two ways to heat a pool for swimming all year round:
Gas ! [ to expensive now a days,] Or a heat pump, a good [Australian] brand cost $7 to 8,000 again depends on pool size, ALL resorts here on the sunshine coast run heat pumps, simple to install.
As someone mentioned above, a pool blanket will save considerable heat lose, blankets come in different "Heat retention" types, but in general are a pain in the As** as you have to remove and replace every time you need to swim, but they will only hold the heat to whats in the pool at the time [cold pool, cold retention] warm pool [warm retention].
If you are using a small diameter pipe and there is a lot of it the friction between the water and the pipe may be enough to stop the water flowing just from gravity therefore you either need bigger pipe or a method of forcing the water through under pressure. e.g. a header tank or a pump
-- Edited by tezza on Thursday 15th of August 2013 08:58:42 AM
hi all
my husband wants to heat the pool so we can swim earlier
we put pipping on the roof which we did and run it into the pool
we were hoping that the law of gravity would work you pump water in one end and it comes out the other end
well it has not worked we have got rid of all the air in the pipes and when we pull the hose out it wont run
so how can we fix it to work , what are we doing wrong and it seems we may need a pump
How big is the pool, how many litres of water do you need to heat, and how high is your roof?
If you want to heat a few litres for a paddle pool using the roof of your van, you need a small pump.
If you want to heat enough water for a 20 metre pool using the roof of your multi story house, you need a professional system.
The pool filter pump can be used to send the water around the heating system, go to your pool supplies shop and they will probably be able to supply the fittings that you need, otherwise buy a small pool pump to pump the water around.
Solar pool heating is not much good until the nights are no longer cool as all the heat you put into the pool water during the day gets lost during the night.
The best you can hope for with a good solar system is about an extra month or two extension of you normal swimming season.
Cheers
David
An old friend used to get six or eight black garbage bags and fill them in the pool and seal them up and leave them in the pool.
His logic was that the sun would heat the water in the black bags and keep the pool a few degrees warmer.
I honestly don't know if it works but he swore by it.
The logic is there though with the solar showers, with the sun heating the shower bag.
When we had a pool years ago I had the "bubble wrap" type pool cover which worked incredibly well as a heater during the day
and an insulator at night to keep the warmth in.
It is also very efficient at killing grass (weeds) if left spread out on a lawn too long on a hot day! DAMHIK.
Cheers Neil
thats what we have done put poly pipe up and thought gravety would do the rest now we have to figure what type if pump do we use
we have a pump for the pool but dont wantto do it that way we have done all the piping from the roof to the pool so would need a seperate pump as they say bugger b
Depending on if you have an Highset or lowset house depends on the pump size [H.P] You will need to ask yourself how many sunny daylight hours you get during the day? To run a pump 8 hrs to gain 3 - 4 deg in water temp to the cost of power to run that pump ? you may be lucky to get an extra 3 to 4 weeks extra swimming, is that worth the extra cost in power ? your pool pump can divert water to your solar blanket on the roof with a 3 way valve fitted & a None-return valve to stop the water draining back down to the pump, which could make the impeller spin of the shaft.
Forget the black poly pipe, rubbish, will never work to a decent temp to swim, a good solar blanket on the roof will cost around $5,000 [depending on pool size] life time before leaks start to appear 5 yrs, + the running costs of you pump. There are only two ways to heat a pool for swimming all year round:
Gas ! [ to expensive now a days,] Or a heat pump, a good [Australian] brand cost $7 to 8,000 again depends on pool size, ALL resorts here on the sunshine coast run heat pumps, simple to install.
As someone mentioned above, a pool blanket will save considerable heat lose, blankets come in different "Heat retention" types, but in general are a pain in the As** as you have to remove and replace every time you need to swim, but they will only hold the heat to whats in the pool at the time [cold pool, cold retention] warm pool [warm retention].
regards
Miroku12g