[Bldg-sim] Proposed Case fan power modelling

Jim Dirkes via Bldg-sim bldg-sim at lists.onebuilding.org
Tue Jul 18 04:27:09 PDT 2017


If the fan is using 4.73BHP, that's the value to consider for energy cost.
It is very common for a motor to have greater capacity than is actually
used.

On Tue, Jul 18, 2017 at 7:24 AM, Mayank Bhatnagar via Bldg-sim <
bldg-sim at lists.onebuilding.org> wrote:

> Hello Everyone,
>
>
> Ours is a Residential Project with PTAC units and DOAS in the Proposed
> design. The DOAS nameplate motor HP is 7.5 where as the fan absorbed power
> is 4.73 BHP. If we model 7.5 HP; we are falling short of the minimum LEED
> energy performance requirements. Modelling
> 4.73 BHP just gives us enough savings.
>
> Which one is the correct fan power to model?
>
> I have been through the archives and didn't find appropriate answer.
> Please help!
>
> Regards,
>
> Mayank.
>
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