Q is the rate of heat delivery, so sizing of lines is according to load. As the boiler cycles it will be putting out more heat than needs to be delivered.Thanks for the reply's, okay I take it elevation head balances itself out. I looked at the TD10, Q=btu/hr and delta T=20 degree difference on supply and return. Is Q what the outside wood boiler is capable of putting out in btu/hr or how is Q arrived at.
Thanks again, Tim
Thanks for the reply's, okay I take it elevation head balances itself out. I looked at the TD10, Q=btu/hr and delta T=20 degree difference on supply and return. Is Q what the outside wood boiler is capable of putting out in btu/hr or how is Q arrived at.
Thanks again, Tim
l=400 ft d=0.863 in
gpm head fps
3.00 6.15 1.65
3.25 7.13 1.78
3.50 8.18 1.92
3.75 9.30 2.06
4.00 10.47 2.19
4.25 11.72 2.33
4.50 13.02 2.47
4.75 14.39 2.61
5.00 15.83 2.74
5.25 17.32 2.88
5.50 18.88 3.02
5.75 20.50 3.15
6.00 22.18 3.29
6.25 23.92 3.43
6.50 25.72 3.57
6.75 27.57 3.70
7.00 29.49 3.84
7.25 31.47 3.98
7.50 33.51 4.11
7.75 35.60 4.25
Not sure if I'm following what you're saying.009 and 007 would leave me about 5 feet of head short of my figures, should i go up to 008, will it hurt the pump or flow or is that close enough.
On the main 340 ft round-trip loop from the boiler to the house; as you can see from the flow vs. head chart above a 1.4 ampere 009 will get you a little less that 6 gpm, a 2.0 ampere 013 will only get you about 7 gpm. You could throw two 013 pumps in series at it and get maybe 10.5 gpm, but now you're using 500 watts, yikes.
The in-slab loops are not part of the boiler-to-house circuit, and yes I'm saying a 008, or similar, or smaller even will move plenty of water for the slabs.I'm not sure i understand now, from Taco FAQ pumps in series only increase head, pumps parallel increase flow. I had a total of 47.8 feet of head in the system, now are you treating the 340 ft.and 300ft. pex loops as separate loops, not counting the head loss with fittings, valves. Are you saying an 009 or 013 will take care of the run from the boiler to house loop then an 008 will take care of the slab circuits. Is it normal to put a bypass loop on an outdoor wood boiler 170' from the house.
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