[EnergyPlus_Support] Re: Temperature and humidity setpoints

["lorenzomattarolo" <lorenzomattarolo@xxxxxxxx>]

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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