Ok, I've read the sticky and taken a look at the Taco page etc.. and I am trying to figure out a couple of things:
1) If the boiler (250kbtu) is out in the workshop (120 feet from the house) and the storage is in the house, what would the delta-T be for the calculations of flow rates etc? I'm thinking 5 degrees at most to be able to get the storage up as hot as possible? For running the load, sure, 40 degrees works, but that won't heat up the storage to a usable temp.
Problem is, that gives 100 gpm as the flow rate! That sounds pretty darn high
Should I be using the average delta T instead of the minimum? I'm thinking that the boiler BTUs will be highest at the beginning of the burn (once it gets really going), when the delta T will be highest because the storage is coldest and then the BTUs will drop as the fuel gets used up and the storage heats up.
Using the average delta T (20 degrees) works out to a much more reasonable 25 gpm.
2) Looking at the Taco calculations, they base their maximum flow rates on keeping the pipes quiet in an occupied space. Obviously no one cares if pipes that are a couple of feet underground and wrapped in foam are noisy. Can those pipes be a bit smaller and then when the pipes enter the house, step up the pipe size a couple of notches to keep it quiet inside the house?
Is anyone running a 200-250 kbtu boiler outside with storage inside? What sort of pipe sizes and flow rates are you using?
Thanks!!
1) If the boiler (250kbtu) is out in the workshop (120 feet from the house) and the storage is in the house, what would the delta-T be for the calculations of flow rates etc? I'm thinking 5 degrees at most to be able to get the storage up as hot as possible? For running the load, sure, 40 degrees works, but that won't heat up the storage to a usable temp.
Problem is, that gives 100 gpm as the flow rate! That sounds pretty darn high
Should I be using the average delta T instead of the minimum? I'm thinking that the boiler BTUs will be highest at the beginning of the burn (once it gets really going), when the delta T will be highest because the storage is coldest and then the BTUs will drop as the fuel gets used up and the storage heats up.
Using the average delta T (20 degrees) works out to a much more reasonable 25 gpm.
2) Looking at the Taco calculations, they base their maximum flow rates on keeping the pipes quiet in an occupied space. Obviously no one cares if pipes that are a couple of feet underground and wrapped in foam are noisy. Can those pipes be a bit smaller and then when the pipes enter the house, step up the pipe size a couple of notches to keep it quiet inside the house?
Is anyone running a 200-250 kbtu boiler outside with storage inside? What sort of pipe sizes and flow rates are you using?
Thanks!!