Re: [EnergyPlus_Support] Re: radiation data in the epw weather format

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

In an epw file, hour 12 represents 11:00 am to 12:00 noon.  The solar radiation 
values for a given hour are the integrated total radiation over the hour in 
Wh/m2.  For hour 12, the value in the epw file should be the total from 11:00 
am to 12:00 noon.

For hourly weather files, EnergyPlus uses this value as the average radiation 
rate for the hour in W/m2.  The average rate is assumed to occur on the half-
hour, at 11:30 am in this example.  Rates for the other time steps in the hour 
are determined by interpolation between the half-hour values of the previous or 
next time step.

Mike


On 22 Mar 2004, at 15:23, Pc Thomas wrote:

> Hi,
> 
> We'd like to find out how the radiation data is handled on an hourly basis for
> the epw format weather file, ie.;
> 
> - does the data for hour 11:00 to 12:00noon get integrated from 11:00 to noon;
> or from 11:30am to 12:00pm and then gets assigned to 12:00noon.
> 
> Best regards,
> PC
> 
> PC Thomas
> Senior Specialist, Arup
> Lvl 10, 201 Kent St.
> Sydney 2000
> t 02 9320 9441  f 02 9320 9321
> m 0417 405 478
> 
> 
> 
> 
> 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 are of the Support Web Site.
> 
> 
> 
> 
>  -- please post any files to the appropriate folder in the Files are of the
>  Support Web Site.
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx



------------------------ Yahoo! Groups Sponsor ---------------------~-->
Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark
Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada.
http://www.c1tracking.com/l.asp?cid=5511
http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/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 are of the Support Web Site.




 -- please post any files to the appropriate folder in the Files are of the Support Web Site.




 
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/