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Re: [EnergyPlus_Support] questions on a 5-zone UFAD model



I would try to fix 3) first. Check the zone and system sizing objects. 
If you can not find the problem, try pasting in an example Zone Sizing 
object and System Sizing object into an email and send it to the support 
group.

annaliu_67 wrote:
>
> Dear all,
>
> I am working on a 5-zone (3000 sf) UFAD model, and got a few
> questions regarding the simulation results.
>
> 1) There are a lot "heating set-point not met" hours (~2000) for all
> 5 zones. I wonder which air temperature is this report comparing
> with the set-point temperature?
>
> 2) There is a recurring warning, which says "Hot Water flow control
> failed in VS VAV terminal unit zone3 VAV reheat". (This error
> occurred 156 times. Iteration limit (500) exceeded in calculating
> the hot water flow rate.) I feel that this should contribute to the
> first problem. But this may not be the only reason, since other
> zones without the recurring warning also have under heated hours.
> Any suggestions on how to fix this?
>
> 3) Another warning I got is "The design coil load is zero for
> COIL:Water:SimpleHeating MAIN HEATING COIL". What could be wrong for
> this one?
>
> I would appreciate it if you could provide any suggestions. Thank
> you all for your help!
>
> Regards,
>
> Anna
>
>  

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