Heating ASRS Warehouse

[DrRTU]

Does anyone have experience with an automated storage retrieval building that is 125’ tall. I am concerned about heating equipment selection. Building will be solid racks with exterior wall panels attached to racking. Roof structure is supported via racking. I cannot install an air rotation unit(s) in the racks. Design to IMC2006. OAT=-4F & IAT=55F. Floor plate is 500’x130’Location midwest USA

 

[cry22]

DR

Man, how can you expect experience from anyone of us here on such a weird shape building?
That aside, here my two cents:
I'd go with fin-tube all the way, no UH's with fans, no moving parts, you can get the heat anywhere you want.
I imagine a HWS/R headers at floor level with a series of "U" tubes branching off teh header, finned the entire height (or intermitently) along the walls, similar to the Whalen systen without the fan coils.
Or, radiators similar to the Runtal radiator system in lieu of FTR's.
I'd add a snow melting system (electric?)on that roof (or more fin-tubes immediately under the roof) to make sure the racks will not collapse from snow load.

For Ventilation, I'd use a supply fan at low level and relief damper/hood on the roof (high on the walls)- Keep the fan in accessible place.

good luck though

 

[DrRTU]

I initially ruled out a hydronic solution due to cost per ft2 but I should look at it again. The actual height is 115’. The 500’ dimension abuts an ASRS freezer of the same height. Per the spec., 2x summer ventilation is required. Room product is food grade. My current design is to use (2) 22,000 CFM 80/20 direct fired units and (4) 16,000 axial fans connected to (4) 30”x40” shaft walls from top to bottom. The axial fans will be driven on VFDs based upon delta T from top to bottom. Inlets at the top and discharge at the bottom. Shafting will be fabricated of prefab building panels external to the building. Snow loads, are the responsibility of the structural engineer.

 

[cry22]

Heat will rise. It's worth looking at Hydronic for the first say 50 to 70 feet only, density will warm up the remaining height.
If you go hydronic, consider using STEEL pipes only, no copper, there is so much copper theft these days that very soon it will be punishable with death penalty.
You probably have no more than 1500 feet of pipe without insulation at $20.00 per foot max. plus the cost of a condensing boiler using a 40F delta T (100 to 140) and you would get a much more efficient and low-maintenance system in my opinion.
I do not see hydronic being cost prohibitive compared to the furnaces, shafts, you are partial to. yo're looking at a 40K to 50K installation either way.