[TRNSYS-users] Radiation processor / printer

[Jérôme Deroche]

Hi everybody,
i have 2 warning messages in TRNSYS16 that i dont succeed in fixing them.

The first one refers to output printers Type25a : 
the printer has rounded the reset time to an even number of steps.-Please check to make sure that it doesnt adversly affect your simulation results.

I think it is because i have put my steptime (in control cards) to 10min that is to say 0.1667h. I havent this message when i put back 1h as a timestep.
I think the cause in printer is the 1st parameter set to STEP with unit=hr. Could you tell me what STEP represents? I was thinking this value to be the steptime in control cards.

The second message refers to irradiation :
"the direct beam is greater than the maximum allowed for this timestep. The extraterrestrial radiation has been used for this time step."

this message refers to unit 60 which is type16c (radiation processors).
i read my total horizontal radiation from datareader (type 9c). the maximum value in my file for radiation is 975W/m² (3510kJ/hr.m²).  I use a multiplication factor in data reader for radiation (3.6) in order to switch to kJ/hr.m² and i send the output to radiation processor which solar constant parameter is seto to 4920kJ/hr.m².

Maybe the problem is about units of the input from data reader. I have tried to send the output of datareader to unit conversion routine (type57). I put parameter 1=17 parameter 2 and 3=1.

Thank you for reading. I hope i have put enough details in order you can understand and help me.



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20101119/4c3a3c04/attachment-0001.htm>