Re: [EnergyPlus_Support] Problems about the Zone Comfortable and Chiller

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

1.  The comfort warnings indicate that the combination of temperature and 
humidity are outside the range described in ASHRAE Standard 55 for typical 
office workers.  As Linda said earlier, search the Input Output Reference for 
"ASHRAE 55" for more information.

2.  The chiller warnings indicate that this air-cooled chiller is operating in 
cold weather.  This may indicate control problems or reveal an opportunity to 
apply air-side or water-side economizers to provide free cooling during cold 
weather.

Mike


On 16 Dec 2005, at 3:26, dreamerfish8146 wrote:

> Dear All:
> 
>      I used version 1.2.3 and there are some warnings I never met in 
> the former version. It said:
> ** Warning ** More than 4% of time (1.0 hours) uncomfortable in zone Z1
>    **   ~~~   ** 10.0 hours were uncomfortable based on ASHRAE 55-2004 
> graph (Section 5.2.1.1)
>    **   ~~~   ** During DesignDay Environment [07/08 - 07/08]: 
> BEIJINGSUMMER
> 
> Is it because the inner temp is not comfortable?(Inner temp is 20¡ãC in 
> winter and 26¡ãC in summer) 
> 
>     The system is fancoil and fresh air.The cooling source is electric 
> chiller which is cooled by air.But there are some warnings like
> ** Warning ** ConstCOPChillerModel:Air Cooled Condenser Inlet 
> Temperature below 0C
>    **   ~~~   ** OutDoor Dry Bulb=-12.11                        , 
> Occurrence info=BEIJINGWINTER, 01/24 00:10 - 00:20
> ** Warning ** ConstCOPChillerModel:Air Cooled Condenser Inlet 
> Temperature below 0C continues...50
> 
> I don't know why this happened. Thank you for help!
> 
> 
> 
> 
> 
> 
> 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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