Re: [EnergyPlus_Support] Getting humidification to work

[Sam Roose <sam@xxxxxxxxxxxxxxxxxxxxx>]

Thank you for your response.  The humidity object has been confusing at
times so I am keen to see the improvements in the next release.

Sam

On 10/1/04 8:48 AM, "Richard J. Liesen" <rliesen@xxxxxxxx> wrote:

> A small typo that completely changes the meaning of the message.  The
> corrected statement is shown below in between asterisks, since you can not
> use HTML formatting in this group.
> Richard L.
> 
> ********************************************
> Hello,
> I have just made some corrections and changes in the Humidistat object
> along with the relative humidity setpoint managers for the new EnergyPlus
> release.  One of the key points that will be stressed in the input output
> reference documentation is that a Humidistat is necessary for the control
> zone to provide a moisture load for the setpoint manager to make its
> calculation.  ***This is a necessary requirement*** and I am not sure how you
> made it to this point without having one in your input file.  As a first
> step I would add the humidistat object and see what happens with your
> simulation.
> 
> Thanks Richard Liesen
> 
> 
> At 12:43 AM 9/30/2004, Sam Roose wrote:
>> >I have uploaded a file called "base case" in the "Sam Roose" folder in which
>> >there is a steam humidifier for humidification and a DX cooling coil for
>> >dehumidification. Running this idf using a Wellington NZ weather file, I
>> >find that the humidity varies between 40 and 90%, whereas the intention is
>> >to keep it between 50 and 56%.  I also find that the humidifier only
>> >registers a maximum of around 600W of power throughout the year, the
>> >equivalent of the humidifier fan power (including stand-by).
>> >
>> >Here's my question:
>> >Is the rated humidifier power (21 kW in this case) registering anywhere, say
>> >on a different meter from electricity? Is there a way to make the
>> >humid/dehumid equipment meet it's demand?
>> >
>> >At the moment I have set up a minimum humidity set point in the "gallery"
>> >zone and a maximum humidity set point in an adjacent zone (in reaction to a
>> >comment made by Michael J Witte on September 17th). I have also got by
>> >without a humidistat in the past (in other words just using a set point
>> >manager). Recently, a reheat set point manager has been added to the file in
>> >order to make the exit temperature from the cooling coil variable. This has
>> >made temperatures tighter, however this may be the reason I am now having
>> >the humidity control problems.
>> >
>> >Any suggestion on how to fix this problem would be greatly appreciated.
>> >Thanks in advance,
>> >
>> >Sam Roose
>> >Energy Analyst
>> >Energy Solutions Ltd.
>> >Wellington, New Zealand
>> >
>> >
>> >
>> >
>> >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.
>> >
>> >Yahoo! Groups Links
>> >
>> >
>> >
>> >
> 
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