1 BTU = energy required to heat 1 lb of water 1 degree F in 1 hour 1 gallon of water = 8.34 lbs @ 62F
15000 gal water = 125,100 lbs A 100 kBTU heater would heat the pool about 0.7F per hour. Sent from my iPhone 5s > On Apr 5, 2015, at 7:49 PM, Jay <jay.pe...@gmail.com> wrote: > > Hi Tom > > Is your doubling of the HE an rule of thumb or is there a formula? > > As to system information. > 510 sq ft collector > 100,000 btu HE ( main problem I think) > 70,000 gal pool > Uncovered ( other main problem. ) > > The problem is that it's not getting the pool warm. > > Thanks for all the help and advice. > > Jay > Peltz power > > > Sent from my iPhone > >> On Apr 5, 2015, at 4:56 PM, Tom Lane <t...@ecs-solar.com> wrote: >> >> Most heat exchangers for swimming pools are designed for boilers delivering >> 140F or 190F as a heat source based on the size and/ or the number gallons >> in the pool . The solution for a low temperature source like solar in order >> to keep the approach temperature low to the flat plate collectors ( and >> efficiency high ) is to use either double the number of heat exchangers >> recommend for the boiler or using a much larger heat exchanger ( twice the >> size required by a boiler for the recommend pool size ) . Make sure you >> use a titanium or stainless steel one designed for pool chemicals including >> salt water . DO NOT USE EVACUATED TUBES TO HEAT A SWIMMING POOL , ! Use >> selective coated flat plate collectors if the ambient air temperature is >> -20F to 60 F when you are heating an indoor swimming pool to less than 95F >> . Quality Pool Manufacturing , Aico , Triangle Tube , and Spirec are among >> many who make heat exchangers for swimming pools suitable for the high flow >> rates required by s > ol >> ar systems . GatorTom PS : yes they can be used for heating water for >> alligator farms . >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
