Re: Error in small time step

["David Bradley" <bradley@xxxxxxxxxxxx>]

Louis,
   When you use a short timestep one of the things that the radiation 
processor must do is to take radiation data (usually on an hourly basis) 
and construct a realistic radiation profile for the smaller timestep. Many 
of the correlations in Type 16 are appropriate if you are using for example 
a 15 minute timestep based on hourly data but begin to break down beyond 
that. One common solution is to use a timestep that is of the form 1/(2^N) 
where N is an integer. At any rate, however, you should not get a Range 
Check error. I would suggest that you contact your distributor with your 
specific input file and see if they can help. I believe that would be me - 
so if the above suggestion doesn't work, please send me the input file and 
whatever weather and other external files might be required to run your 
simulation. My direct email address is bradley@tess-inc.com
Cheers,
   David

At 10:19 AM 7/10/2002 +1000, you wrote:
>Dear TRNSYS users,
>
>I have a problem when I run TRNSYS with small time step (0.1-0.5 minutes). 
>After investigation, I found it the
>problem occurs from the Radiation Processor Type 16h with the time step 
>less than 0.6 minute.
>Without the radiation processor, I can run my project with any time step I 
>would like.
>
>The error message is Range Check Error.
>
>How can I run the project included radiation processor with a small time step?
>Have anyone encountered this problem?
>
>Thank you for your help,
>Louis
>-------------------------------------------------------------------------------------------------------------------
>Piya Louis Siangsukone
>
>Australian National University
>Department of Engineering
>Canberra, ACT 0200
>Australia

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