[EnergyPlus_Support] Re: Zone will not reach setpoint

["JV Dirkes II" <jvd2pe@xxxxxxx>]

Dear E+ Forum,

I've tried using V2.2.026, since that version addresses a known reheat
 problem, but the model still reflects the problems noted in my last post.

Can anyone help?

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "JV Dirkes II" <jvd2pe@...>
wrote:
>
> Dear E+ Forum,
> 
> I am still hoping for some help with this problem. I've added report
> variables, tried different settings, double and triple checked all th
> input, and still cannot get the zone to warm up.
> 
> Thanks in advance.
> 
> p.s., The uploaded file is called "ZoneTooCold.zip"
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "JV Dirkes II" <jvd2pe@>
> wrote:
> >
> > Dear E+ Forum,
> > 
> > My current model includes a variable volume air handler and VAV boxes
> > with reheat coils.  The zone which represent 90% of the building never
> > reaches its setpoint on the Winter Design Day.
> > 
> > Per report variables, the air handler has proper temperature heating
> > hot water (82C) and the discharge temperature is at the expected
> > setpoint (12.9C).  Air flow is autosized.
> > 
> > The zone reheat coil is also autosized and has the same heating hot
> > water temperature as the air handler.  Per report variables, the
> > reheat coil has water flow and is using energy, but only heats the
> > zone to 5C instead of the setpoint (21.1C).
> > 
> > I've tried manually sizing the reheat coils much larger than the load,
> > but they continue to use only a small fraction of their capacity and
> > the zone stays too cold.  Please let me know what might prevent the
> > reheat coils from warming the zone properly.  Thanks!
> > 
> > p.s., I've uploaded the file in case it will be helpful.
> >
>



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