Re: [EnergyPlus_Support] Warning: "Air volume flow rate per watt ... is out of range .."

[Don Shirey <shirey@xxxxxxxxxxxx>]

The warning can be an indication of very low supply air flow rate 
compared to the coil's cooling capacity.... and very low outdoor air 
temperatures may also be contributing.

Find the autosized air flow rate and cooling coil capacity in the .eio 
file ... and then look at the COIL:DX:COOLINGBypassFactorEmpirical 
documentation in the IO Reference and Engineering Reference for how that 
coil model works and how the flow rate/capacity values are used.


JV Dirkes II wrote:
> Dear E+ Forum,
>
> The Air handler for a current E+ model (v2.2) has a
> COIL:DX:COOLINGBypassFactorEmpirical cooling coil and a hot water
> heating coil.  The model runs, but has hundreds of instances of this
> warning or "Full load outlet temperature indicates a possibility of
> frost/freeze...", which appears to have a similar cause. All
> capacities are autosized and I am simulating only 3 Design Days with 4
> timesteps per hour (so the hundreds of warnings seem to be too many!)
>
> Will someone help me understand the cause of the error and how to
> resolve it?  Thank you!
>
>
> ------------------------------------
>
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>
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>
>

------------------------------------

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