Re: [EnergyPlus_Support] Minimum Humidity Control

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

To add components to a system created using COMPACT HVAC objects, you need to 
do the following steps:

1.  Run the base input file which contains the COMPACT HVAC objects.

2.  Copy the resulting .expidf output file to a new name .idf  (The expidf file 
is the resulting input file in which the COMPACT HVAC objects have been replace 
with sets of basic EnergyPlus HVAC objects.)

3.  Add the humidifier and related objects to this input file.  Note that you 
must add the humdifier to the BRANCH object for the air loop, and you must 
change the outlet node name of the preceding component, or the inlet node name 
of the component after the humidifier in order for this to flow properly.

Mike


On 16 May 2006 at 19:33, aboyemeplus wrote:

> With the objective to control minimum relative humidity in a zone, I 
> have added the following to an air handling system generated using 
> COMPACT HVAC objects THERMOSTAT, ZONE:UNITARY, and SYSTEM:UNITARY.
> 
> a) Humidistat controlling RH in Zone 1 according to a specified RH   
> schedule.
> 
> b) Humidifier located downstream of the AHU "Cooling Coil" and 
> upstream of the "Zone Splitter". The inlet and outlet nodes of the 
> humidifier are  "Air Loop Outlet" and "Supply Path Inlet". Both of 
> these nodes were generated using the COMPACT:HVAC objects.
> 
> c)A "Setpoint Manager: Single Zone Min Hum" object with "AHU 1 
> Supply Path Inlet" as the SetPoint Node and "ZONE 1 ZONE AIR NODE" 
> as the name of the Control Zone Node. Note that the latter field is 
> called "Name of a Node list (or Node)" in the IDF, while the I/O 
> Reference describes it as the "name of the zone node of the humidity 
> control zone". My input was based on the description provided in the 
> I/O reference (Please confirm whether or not the latest I/O refrence 
> is accurate on this).
> 
> The above modifications made no difference in the results. The 
> minimum RH specified in the humidistat RH schedule has not been met. 
> Inspection of the "eplusout.bnd" indicates that there is no 
> humidifier in the system.
> 
> 1) Is it possible to add a component such as a humidifier to an air 
> system created using COMPACT:HVAC objects?
> 
> 2) How is the signal from the Humidistat used by the "Setpoint 
> Manager" or the "Humidifier"? I do not see a call/reference to the 
> humidistat from either of these objects.
> 
> 3)Do I need to add other objects besides those descibed above to 
> simulate minimum humidity control? 
> 
> Please provide insight when you have a chance. Thank you for your 
> valuable time. Will be happy to upload the model, if needed.
> 
> 
> Merid 
>  
> 
> 
> 
> 
> 
> 
> 
> 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





------------------------ Yahoo! Groups Sponsor --------------------~--> 
Home is just a click away.  Make Yahoo! your home page now.
http://us.click.yahoo.com/DHchtC/3FxNAA/yQLSAA/dkFolB/TM
--------------------------------------------------------------------~-> 

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

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/