Solar heater for above ground pool.

Discussion in 'Plumbers' Talk' started by Marc Berry, Jun 25, 2018.

  1. Marc Berry

    Marc Berry New Member

    Hi guys

    I'm creating 2 solar boxes with black hose coiled up to gather heat while the water runs through approx 60 meters of hose.

    I realise it won't heat the pool massively but running a small pump attached to the hose should be cheaper than running the pools pump with an attached heater.

    I ordered a boiler water circulator but the connections are about 1.5 inch male threaded or with an adaptor it is about 1 inch female thread. The hose is 15mm internal diameter.

    Is there an adaptor get them to fit?

    Cheers, Marc
     
  2. Marc Berry

    Marc Berry New Member

    Anyone help?
     
  3. rogerk101

    rogerk101 Active Member

    Do you even need a pump?
    I once implemented a swimming pool heating system that worked off thermosiphoning. The temperature differential between the hot water at the end of the pipe run and the cooler water at the other end of the pipe was enough to keep the water circulating. The good thing about the system is that it is completely self-regulating, in that it only circulates when the water is heated enough.
     
    DIY womble likes this.
  4. DIY womble

    DIY womble Active Member

    Why aren't pools painted black to aid in water heating
     
  5. Marc Berry

    Marc Berry New Member

    Cheers guys.

    As the water is cold, at least initially, there isn't any warm to start that circulation so i need the pump to start with at least.

    Any thoughts on connecting them?

    Thanks, Marc
     
  6. DIY womble

    DIY womble Active Member

    As the solar box heats up it will force the water up, I think
     
  7. rogerk101

    rogerk101 Active Member

    I can confirm that it does.
     
  8. Marc Berry

    Marc Berry New Member

    How would the water initially get into hose in the box from the pool? Obviously it's full of air to start and the water will be the same temp both ends.

    I've got the pump now anywayaand it has speed settings so I'd like to use it but just need to connect it.
     
  9. masterdiy

    masterdiy Active Member

    Add a Water Solar Panel.
    Works great. I fitted 5 to my pool, water was too warm....
    [​IMG]
     
    DIY womble likes this.
  10. Marc Berry

    Marc Berry New Member

    Blimey that price is steep.

    I've already bought all the stuff and partially built it so I'm not looking to do something different just how to couple it. However, I've sorted it now. Cheers.
     
  11. Marc Berry

    Marc Berry New Member

    Hi guys.

    Firstly the circulating pump i bought wasnt up to the job. Not powerful enough but i think it was more it was the wrong type.

    Removing the pump didn't then allow the natural pumping action mentioned above unfortunately.

    Keeping in mind the water needs to be drawn up about 2.5m onto the shed roof, around about 90m hose pipe then back down, would a submersible pump work? One of those for getting dirty water out of ponds and similar places?
     
  12. DIY womble

    DIY womble Active Member

    Air in solar heater, feed from bottom of pool , out from solar heater insulated, can't understand what's wrong , solar heater isn't laying flat is it ?
     
  13. DIY womble

    DIY womble Active Member

    If it is flat you will need a pump
     
  14. Marc Berry

    Marc Berry New Member

    hi mate. not sure what you mean with the part 'air in solar heater'.

    the intake pipe goes over the edge of the pool and is resting close to the bottom. it then went up to the pump that was screwed to the side of the shed. then up to the first solar box and through about 20m of coiled hosepipe. out that box and into the next with about 25m of the same hose coiled up then out and over the side of the pool at the other end. the solar boxes are covered with sealed perspex and have radiator foil on the inside and underneath the hose. it isnt quite air tight due to the hoses going in and the cable ties that hold the hose in place but it gets plenty hot in there. they are at the same angle as the shed roof which i think is about, 30 degrees maybe.
     
  15. Marc Berry

    Marc Berry New Member

    this was the end of the day. the sun is on the boxes without shade most of the day[​IMG]

    [​IMG]

    and the failed pump...
    [​IMG]
     
  16. DIY womble

    DIY womble Active Member

    Coiled hosepipe ? Photo pls, also pump 3.3m3/ h max , how many m3 in pool
     
  17. PhilSo

    PhilSo Active Member

    This is funny to watch.

    PhilSo :D:D:D
     
    The Teach likes this.
  18. Marc Berry

    Marc Berry New Member

    why?
     
  19. Marc Berry

    Marc Berry New Member

    [​IMG]

    just found out a calculator for cubic meters and it shows as 8.5 for my pool. so that pump is lower but i'm not sure what that would mean. is it that it shouldnt work at all or just too slowly?
     
  20. DIY womble

    DIY womble Active Member

    You do need to use a pump , hot water rises, solar boxes zig zag from bottom to the top, your reflecting foil is actually reducing output , better remove and paint black, spread the coil out as much as possible, insulate pipe that runs from one box to the other and the output pipe to the pool (also put this at the bottom , not near the uninsulated input pipe )your not going to get much power( heat) but you've got this far so worth a go, have a look on line at diy designs. Thermo cycling requires a constant elevation to work so pump required for you , cheap high volume submergible should only be £30 ish, you would probably be better of without the boxes and lay directly onto roof ,spread out as best you can
     

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