[TRNSYS-users] weather data reader

David Bradley bradley at tess-inc.com
Wed Oct 24 20:40:58 PDT 2007

   TRNSYS interpolates weather data when you use 
a time step less than an hour. For variables such 
as temperature and humidity, a linear 
interpolation is used. For solar radiation, a 
more complex algorithm based on cumulative 
radiation distributions functions is used.
Kind regards,

At 08:11 10/24/2007, LiDapeng wrote:
>Dear trnsys users:
>     Now I want to simulation something in small 
> time step, for example timestep=0.25hour, but 
> the weather data is the hourly data. Then how 
> does trnsys deal with it? eg:air temperature is 
> 10¡æ at 10th hour and is 12¡æ at 11th hour, 
> then what is the temperature at 11.25th hour?
>     thanks!
>     regards!
>  Dapeng
>ÓÃ Windows Live Spaces 
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>TRNSYS-users at engr.wisc.edu

Thermal Energy System Specialists (TESS), LLC
David BRADLEY                           2916 Marketplace Drive - Suite 104
Partner                                        Madison, WI 53719
Phone: (608) 274-2577 USA
Fax: (608) 278-1475
E-mail: bradley at tess-inc.com
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