What size pool heat exchanger

[2807]

Hello list,

At the moment, I have a 230,000 BTU heat exchanger for 120 X 47 mm tubes that are currently heating my swimming pool.  This seems to work OK & whilst the pool pump is on, the solar loop never gets particularly hot, maybe 50 degrees - maybe a few degrees more.

I am adding a further 80 X 47 mm tubes and 100 X 58 mm tubes and suspect that the current heat exchanger will not be able to cope with the extra energy transfer.  Will another 230,000 BTU heat exchanger be sufficient to handle the additional tubes (I will be re-configuring the layout so I will have 50 X 58 mm Tubes and 100 X 47 mm tubes feeding each heat exchanger).

Is there a calculator somewhere to help with my decision?

2807

[Taffyboy]

Not sure how the calculations work, but I have a 160,000 btu heat exchanger linked to a 28Kw boiler at the mo to heat a 40ft by 16 ft pool, I don't think your panels will generate 230,000 btu will they?

[daftlad]

Hey Taffyboy, welcome back, been anywhere nice
peace out

Maybe you should answer this somewhere else, going off topic so early is not right is it? 

[Taffyboy]

Nowhere nice sadly, just had issues with free broadband..(as my landlord moved out of main house whilst it was being done up, buggers took the wireless router with them) and anyway, I'm on topic!

[knighty]

the colder the tubes are, the more efficient they are, so it all really depends on the price of the heat exchangers

at the temperature difference between the tubes and the pool increases, so does the heat transfer between the two...

personally.... I'd do it like this... all in one line...

50x58tubes --- heat exchanger 1 --- 100x47tubes --- heat exchanger 2 --- back into the 50x58tubes....


unless of course the tubes will be pointing in different directions etc...

[Taffyboy]

Shirley a 230,000 h/e will handle the output of all those tubes? After all pool water is about 32 deg passing through at a rate of knots.