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19-03-2009, 02:32 PM #1
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Pool heat pump water side diagram
Hi guys! I have customer who want to connect his home heat pump to heat pool during mild and cool weather.
It has 45 kW heat pump with desuperheater for heating domestic hot water, and I proposed to him that he could use that heat exchanger for that purpose.
I don't have any experience in pool installations so I need diagram of ordinary pool instalation with heat exchanger for additional heating from heat pump since pool have his own heater by electricity.
I thinking to connect heat pump heat exchanger before pool electrical heater so that pool automatic could remain untouched and only regulation for desuperheater circuit should be one 3-way valve for bypassing the heat exchanger when temperature in pool has reached.
Does anyone have any schematic diagram of such existing system and how control of this combination should be done without touching pool electronics.
It should work on desuperheater only, when heat is available from heat pump and at electrical heater, when there is no heat availiable from heat pump.
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19-03-2009, 06:36 PM #2
Re: Pool heat pump water side diagram
Years ago I have made a heater, gas operated with PHE and pumps. If you are interested, I can draw you something and email it to you.
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19-03-2009, 10:41 PM #3
Re: Pool heat pump water side diagram
One thing to be aware of Nike.
Will the pool chemicals, chlorine etc., affect the metals of the desuperheater?Brian - Newton Abbot, Devon, UK
Retired March 2015
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20-03-2009, 05:30 AM #4
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Re: Pool heat pump water side diagram
It is not direct heat transfer. It first heat water in closed loop, and at pool side is going to be second heat exchanger for pool water heating of proper material (titane, I think). It is going to be supplied and installed by original pool equipment installations company.
Last edited by nike123; 20-03-2009 at 06:21 AM.
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20-03-2009, 05:57 AM #5
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20-03-2009, 06:17 AM #6
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Re: Pool heat pump water side diagram
This is pool electrical heater (i think 18kW)
Anyone recognize manufacturer or model? It is blured image, something like Titane or Titanic or Titank.
This is 45kW Galletti heat pump for cooling and heating house, and it has desuperheater for heating domestic hot water, and we already made before branch for swimming pool heat exchanger.
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20-03-2009, 08:34 AM #7
Re: Pool heat pump water side diagram
Hi Nike,
Please leave me your email in my PM and I prepare it for you or you prefer it here. Whatever.
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20-03-2009, 08:47 AM #8
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20-03-2009, 09:20 AM #9
Re: Pool heat pump water side diagram
Hi,
On a standard pool installation you will always install the heat pump before any other form of heating, so you will need to put your heat exchanger before the electric heater.
Do not recognise that electric heater, not something i have seen in this country.
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20-03-2009, 01:12 PM #10
Re: Pool heat pump water side diagram
I have noticed that the pipes entering and leaving the electric heater are not insulated. Thats odd.
Standard heat pump is a slow heater and always have a large reservoir.
How much water in the pool? [C\M]?
Is the pool indoors?
What water temp do you want to achieve?
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20-03-2009, 04:01 PM #11
Re: Pool heat pump water side diagram
No swimming pool pipework is insulated on an indoor or outdoor pool.
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20-03-2009, 04:42 PM #12
Re: Pool heat pump water side diagram
No swimming pool pipework is insulated on an indoor or outdoor pool.
It doe's not make any sense.
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20-03-2009, 06:44 PM #13
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21-03-2009, 09:18 AM #14
Re: Pool heat pump water side diagram
In a pool pipework system there are so many places where heat loss can occur. ie, sand filters which are uninsulated and can be anything up to 8 feet square, so insulating the pipework would be a bit pointless and as you are only trying to achieve temperatures of between 27 and 30 degrees c, the ambient temperature is normally not much lower than this in a majority of pool plant rooms. Most of the pool pipework is underground, often with only about 4-5 meters of pipe above ground on your average domestic pool.
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21-03-2009, 12:23 PM #15
Re: Pool heat pump water side diagram
Just for a civilized argue,
Insulation is a matter expenses, everything can be well insulated, pipes, filters, valves....
you generally heat pools in the winter [which is about 8 months a year in the UK]
Ground temp 1 meter deep will not be over 10°C......
And so on. To my humble opinion it is bad practice!
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21-03-2009, 05:28 PM #16
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Re: Pool heat pump water side diagram
Sorry guys, I was been away from my computer till now.
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21-03-2009, 05:53 PM #17
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Re: Pool heat pump water side diagram
As CHIZEL010 already said, it is common practice that pool pipes are not insulated. Maybe that is because they are plastic with thick wall. Low heat loss.
Pool is about 8x10x2m (160^3)
Pool is outdoor in mild Mediterranean climate!
25°C in cold days is target temperature. Pool is outdoors.
It is goal to use as much is possible heat from /air conditioner/heat pump, but only when air conditioner works for heating/cooling house and rest of heat should be added with electrical heater.
I think that electrical heater is of 20 kw power.Last edited by nike123; 21-03-2009 at 05:55 PM.
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22-03-2009, 03:45 PM #18
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Re: Pool heat pump water side diagram
This is diagram what is done and what is planed (in red).
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22-03-2009, 04:03 PM #19
Re: Pool heat pump water side diagram
The function of the 3-way valves is not clear from the drawing, what side is always open?
Have you considered how much heat is really available? What does the refrigeration system do normally? Heating or cooling something?
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22-03-2009, 04:44 PM #20
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Re: Pool heat pump water side diagram
That depend on house heat loss and gain in different weather conditions, so main goal is use rejected heat in cooling season and use of cheaper heat in heating season. No calculation is done but maximum what desuperheater could produce is about 12-15kW when both compressor are running (system have got 2 refrigerant circuits)
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22-03-2009, 05:12 PM #21
Re: Pool heat pump water side diagram
Is it necessary to stop the circulation to the hot water tanks any time? Can this water be to hot? If not then I propose to do like this:
When the hot water is satisfied the valve is alowed to switch to swiming pool position if heat is required. I dont know how to make the signal for the swimming pool heat required. Is it possible to take a signal from the swimming pool heat regulator?Last edited by SteinarN; 22-03-2009 at 05:15 PM.
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22-03-2009, 05:29 PM #22
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22-03-2009, 05:31 PM #23
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Re: Pool heat pump water side diagram
Duplicate post.
Last edited by nike123; 22-03-2009 at 05:35 PM.
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22-03-2009, 07:42 PM #24
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Re: Pool heat pump water side diagram
I found something useful in Alfa Laval documentation. Any comment?
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