Re: [EnergyPlus_Support] Design Days

[Linda Lawrie <linda@xxxxxxxxxxxxxx>]

Read the design conditions section of the ASHRAE HOF
(Handbook of Fundamentals).

The design days that are included with the EPW files (extension .ddy) are
direct derivatives of those yearly conditions.
Sizing only uses the peak of any heating/cooling.  
You could actually have a cooling peak on a winterdesign day but that
wouldn't be common.

the next release after this will include monthly design conditions as
shown in the HOF as well.  Again, some peaks may happen at lower sun
angles than the hottest months.

At 12:23 PM 3/27/2012, hnoboam wrote:
> Dear List.
>
> In many many example idfs I have seen only two design days used, one for
> summer, one for winter. However, in the weather file package for any
> site, for example for Beijing, the ddy file contains many design day
> definitions.
> My questions are:
> 1. All the choices of design days are for me to choose one that I
> like?
> 2. What happens if I include more than one winter design day and/or more
> than one summer design day? I just did this and E+ ran, not sure what it
> did with the different autosized values.
>
> Thanks
>
> Homero
>
>
>
> ------------------------------------
>
> Primary EnergyPlus support is found at:
> http://energyplus.helpserve.com or send a message to
> energyplus-support@xxxxxxxx
>
> 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 currently allowed but be mindful that not everyone has a
> high speed connection.  Limit attachments to small files.
>
> EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf
> under the Documentation link and press the "search"
> button.
> Yahoo! Groups Links
>
> <*> To visit your group on the web, go to:
>    
>
> http://groups.yahoo.com/group/EnergyPlus_Support/
>
> <*> Your email settings:
>     Individual Email | Traditional
>
> <*> To change settings online go to:
>    
>
> http://groups.yahoo.com/group/EnergyPlus_Support/join
>     (Yahoo! ID required)
>
> <*> To change settings via email:
>     EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
>    
> EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx
>
> <*> 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/

__._,_.___

Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

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 currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.

Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___