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Re: [EnergyPlus_Support] Re: Temperature and humidity setpoints
1. "Electric Steam" is the only option, or "None". Do you have the
documentation for the interim release? CompactHVACInterimUpdateV2-0-0.pdf
2. This restriction was put into Compact HVAC because there cannot be more
than on humidistat object attached to the same zone. However, in your case,
because you want the same relative humidity setpoint for both humidification
and dehumidification, this can be done. You will need to specify a different
control zone name for the humidifier, then edit the expidf file to delete the
extra humidistat and also edit the last field in SET POINT MANAGER:SINGLE ZONE
MIN HUM to use the same zone node name as the SET POINT MANAGER:SINGLE ZONE MAX
HUM.
Mike
On 18 Sep 2007 at 9:31, lorenzomattarolo wrote:
> Dear Michael,
>
> thanks a lot for your suggestions.
>
> 1. I'm trying to use the Compact:HVAC:system:VAV but I can't
> understand what input I should add in the ID:A27 "humidifier type".
>
> 2. In order to have the setpoint of 50 HR into the zone all the time,
> I'm using both humidifier and dehumification.
> However I read that humidifier and dehumidification must use different
> control zone.
> How can I solve it?
>
> Many thanks,
>
> Lorenzo
>
>
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
> <mjwitte@...> wrote:
> >
> > You can add an air-loop system to serve the same zones that are
> being served by
> > the radiant panels. By adding dehumdification controls, the air
> system can
> > control for humidity (cooling priority 1 in the zone equipment list)
> and the
> > radiant panels can pick up the remaining sensible load (cooling
> priority 2).
> >
> > If you already have an air system described and want to add humidity
> controls,
> > see exmple file 5ZoneWaterCooled_HighRHControl.idf (chilled water
> system) or
> > FurnaceWithDXSystemRHcontrol.idf (DX system).
> >
> > If you have not already set up the air system description, the
> quickest way to
> > would be to use COMPACT HVAC unitary or VAV objects. Get the
> updated COMPACT
> > HVAC interim release from the yahoo group files area
> > (CompactHVACInterimUpdateV2-0-0.zip in the Updates folder). This
> update
> > includes humidity control options on the VAV and unitary system
> types. If you
> > add this to your idf which already contains the radiant system, the
> run will
> > fail, because COMPACT HVAC will create duplicate instances of
> CONTROLLED ZONE
> > EQUIPMENT and ZONE EQUIPMENT LIST. Take the expidf output file and
> edit it to
> > merge these objects for the two systems.
> >
> > Mike
> >
> >
> > On 14 Sep 2007 at 7:35, lorenzomattarolo wrote:
> >
> > > Dear E+ support,
> > >
> > > I'm analysing an office building.
> > > The temperature of the office is controlled by a radiant system with
> > > panels on the ceiling.
> > > Besides an air system supplies primary air at a temperature of 16°C
> > > and at variable humidity. It varies the content of humidity according
> > > to a setpoint of 50% H.R. inside the office.
> > >
> > > I'm modelling this office with E+ by a system with radiant panels
> > > which control the temperature of the zone
> > > (by means of "zone control thermostatic" with "heating/cooling single
> > > setpoint")
> > >
> > > How can I model this air system?
> > > Is there a way to control the temperature of the zone by the radiant
> > > system and the humidity of the zone by an air system?
> > >
> > > Many thanks,
> > >
> > > Lorenzo
> >
> > ========================================================
> > Michael J. Witte, GARD Analytics, Inc.
> > EnergyPlus Testing and Support
> > EnergyPlus-Support@...
> >
>
>
>
>
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>
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>
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>
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>
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>
>
>
>
>
========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
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