Re: [EnergyPlus_Support] Re: Humidifier Control

["Michael J. Witte" <mjwitte@xxxxxxxx>]

Unfortunately, there appears to be a bug with humidifier control when there is 
a latent load in the space.  A bug report was posted in response to your 
earlier inquiry - sorry I must have forgotten to pass that along here.  

In general, though, if you use HOT WATER EQUIPMENT for this purpose, it will 
place a load on the Purchased Hot WAter meters (it is not served by the hot 
water loop as one might expect).

Another option for adding a latent load to the space would be to use OTHER 
EQUIPMENT, but you will get the same poor control no matter how you add the 
latent load with 1.3.0.

Mike


On 30 Aug 2006 at 18:16, Elmer Morrissey wrote:

> I found one problem with the file, it seems that the 10 KW latent gain
> in the zone causes the major problems. To simulate a 10kw latent gain,
> I have used the HOT WATER EQUIPMENT object and put in 10000W with 1.0
> for fraction latent. Have I missed something about why I can't use
> this object in this way? Is there any other way to introduce a 10kw
> latent load without disrupting a humidifier's control?
> 
> Kind regards
> 
> -Elmer
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Elmer Morrissey"
> <elmofuddly@...> wrote:
> >
> > Hello all,
> > 
> > Could anyone take a look at a file I have uploaded in the problem
> > submittals section (it's called "Test baseboard AHU3.idf"). As can be
> > seen here, I cannot get the humidifier to turn on. I have looked at
> > the outlet node's "humidity max" and it just returns zero constantly.
> > Additionally, the "Zone/Sys Moisture Load Rate Predicted" looks out of
> > sinc with the zone temperature and RH (RH setpoint is 60% but I only
> > ever get 35% as the humidifier doesn't seem to turn on).
> > 
> > I would really appreciate anyone's input.
> > 
> > Kind regards
> > 
> > -Elmer
> > 
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
> > <mjwitte@> wrote:
> > >
> > > No, I do not see a way to accomplish this.
> > > 
> > > Mike
> > > 
> > > 
> > > On 16 Aug 2006 at 17:35, Elmer Morrissey wrote:
> > > 
> > > > Hello all,
> > > > 
> > > > Is it possible to turn on a humidifier in E+ but to have nodal
> > control 
> > > > only and to ignore zone conditions. I need to raise the RH to
> 40% for 
> > > > temperatures of 26C.
> > > > 
> > > > Kind regards
> > > > 
> > > > -Elmer
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > > The primary EnergyPlus web site is found at:
> > > > http://www.energyplus.gov
> > > > 
> > > > The group web site is:
> > > > http://groups.yahoo.com/group/EnergyPlus_Support/
> > > > 
> > > > Attachments are not allowed -- please post any files to the
> > appropriate folder
> > > > in the Files area of the Support Web Site.
> > > > 
> > > > EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf
> > and press the
> > > > "search" button.
> > > >  
> > > > Yahoo! Groups Links
> > > > 
> > > > 
> > > > 
> > > >  
> > > > 
> > > > 
> > > > 
> > > > 
> > > > 
> > > 
> > > 
> > > ========================================================
> > > Michael J. Witte, GARD Analytics, Inc.
> > > EnergyPlus Testing and Support      
> > > EnergyPlus-Support@
> > >
> >
> 
> 
> 
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.idf and press the
> "search" button.
>  
> Yahoo! Groups Links
> 
> 
> 
>  
> 
> 
> 
> 
> 


========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





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