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Re: [EnergyPlus_Support] Elegant Solution for AHU heating outlet temp 38 cooling outlet temp 16

EMS can override a node set point.

On 5/2/2012 7:08 AM, Jean marais wrote:
> Dear Group,
> After finding some spar time I've implemented an idea I had a while ago, with some success.
>
> There is a delema of setting a setpoint on a node which is in turn referenced by SetpointManager:MixedAir (used to take into account the fan heat) for an AHU where one wants 16 deg C supply air temp in cooling but 38 degC supply air temp in heating.
>
> The problem was choosing between the SetpointManager:(Multi/Singlezone):Cooling or SetpointManager:(Multi/Singlezone):Heating.
>
> To solve this, I added an extra piece of Object Duct, so that I could place the SetpointManager:(Multi/Singlezone):Cooling on the duct entrance node and SetpointManager:(Multi/Singlezone):Heating on the duct exit node (SupplySide last node).
>
> Then I have SetpointManager:MixedAir objects for the cooling coil (which references the duct entrance Setpoint) and the heating coil (which references the duct exit Setpoint).
>
> The only remaining imperfection is the SetpointManager:MixedAir for my mixing box...it can only reference either for the heating case or the cooling case.
>
> Any ideas?
>
>
>
>
>
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Richard A. Raustad
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