[EnergyPlus_Support] Design Day Definitions Update

[Drury.Crawley@xxxxxxxxxx]

Note that we will update the .DDY files that come with
the EnergyPlus format weather files (EPW) on the
EnergyPlus web site in the next few weeks.  We're tweaking
some information in the files to better characterize monthly,
seasonal and annual typical/extreme periods.

----- Forwarded by Drury Crawley/EE/DOE on 01/14/2005 09:50 AM -----
                                                                                                             
                      "Linda Lawrie"                                                                         
                      <linda@xxxxxxxxxx>       To: EnergyPlus_Support@xxxxxxxxxxxxxxx                        
                                               cc:                                                           
                      01/14/2005 08:18 AM      Subject:  [EnergyPlus_Support] Design Day Definitions Update  
                      Please respond to                                                                      
                      EnergyPlus_Support                                                                     
                                                                                                             
                                                                                                             
                                                                                                             
                                                                                                             



As someone noted earlier this week, the macro datasets (and the design day
definitions from weather files where they have ASHRAE counterparts) had 0.0

windspeed for the summer conditions.  Changing this is not so simple as it
might seem and, in fact, you need to be aware of what you are using vs the
traditional values.

We have updated the macro data set design day definitions (taken from
ASHRAE tables) to have the wind speed values (99.6% - heating, 1% cooling)
in the design day objects.

But you should be aware that traditional values for these are 6.7056 m/s
(15 mph) for heating and 3.3528 m/s (7mph) for cooling.  This is also shown

in the comments for the wind speed values.  Also added were the noted
extreme temperatures from the ASHRAE tables as well as the extreme wind
speeds -- in comments, of course.

New files uploaded:
   File        : /Updates/USDesignDayDefinitions.zip
   Description : US Design Day Definitions updated with design condition
wind speeds for both heating and cooling as well as showing the traditional

defaults.

You can access the file at the URL:
http://groups.yahoo.com/group/EnergyPlus_Support/files/Updates/USDesignDayDefinitions.zip



   File        : /Updates/CanadaDesignDayDefinitions.zip
   Description : Canadian Design Day Definitions updated with design
condition wind speeds for both heating and cooling as well as showing the
traditional defaults.

You can access the file at the URL:
http://groups.yahoo.com/group/EnergyPlus_Support/files/Updates/CanadaDesignDayDefinitions.zip




   File        : /Updates/WorldDesignDayDefinitions.zip
   Description : World Design Day Definitions updated with design condition

wind speeds for both heating and cooling as well as showing the traditional

defaults.

You can access the file at the URL:
http://groups.yahoo.com/group/EnergyPlus_Support/files/Updates/WorldDesignDayDefinitions.zip




Once you have copied your locations you may prefer to replace the condition

values with the more traditional values at your option.


Linda

EnergyPlus WebSite: http://www.energyplus.gov
Owner: EnergyPlus_Support list
Member: EnergyPlus Development Team



[Non-text portions of this message have been removed]



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