[EnergyPlus_Support] Re: Warning: Branch flow rates out of bounds

["mingming_zuo" <mingming_zuo@xxxxxxxxx>]

Hi,I think energyplus will automatically shut down chillers when no 
cooling load is posed on the CHW loop,my experience with CHW loop in 
EnergyPlus is that ,if the pump is scheduled to run in some time 
while not in other times,the pump will continuousely run in its 
cheduled time rather than run just when there is cooling load. So one 
tip to overcome this is to place pumps in series with chillers, and 
set chillers with active mode and pumps with passive mode. With these 
settings, the pumps will be forced to run in consistent with 
chiller's operation status.

Zuo
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "anarui.oliveira" 
<anarui.oliveira@...> wrote:
>
> Hi all.
> 
> Because Chiller and Boiler components don't have scheduled 
> availablity control options, and because, due to components heat 
> losses, the chiller is called to work even if no cooling coil is 
> asking, I tried to force it off by scheduling off the pumps (in 
> Heating and cooling water loops).
> When I did this, I got several errors like:
> 
> "PlantFlowResolver: Branch flow rates out of bounds, for Plant 
> Loop=COOLING LOOP CHILLED WATER LOOP, Branch=45368 COOLING COIL CHW 
> BRANCH"
> 
> but the simulation results seem to coherent, including that pumps 
and 
> chiller are not working when I didn't want them to.
> 
> Can I ignore these warnings or does it really affect the simulation?
> Is there a more correct way to ensure the chiller isn't just 
turning 
> on because of the pump heat losses?
> 
> Regards,
> Ana Rui.
>



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