[TRNSYS-users] type 71 evacuated collector: problem with radiation on 24 hr

[d.bradley at tess-inc.com]

Giuseppe, 

 I am not sure what you mean by your first question. As far as your
second question is concerned though I think you only need to change the
simulation time step. Note that you will leave the data interval
unchanged in Type9 (the data interval stays 1 hour). I am not sure that
I would set the simulation time step lower than about 1 minute however.
The algorithms that interpolate solar radiation data are appropriate for
timesteps between about 1 minute and 1 hour but they do an increasingly
poor job of predicting the split between beam and diffuse radiation at
timesteps less than one minute. 

Kind regards, 

 David 

On 2014-06-27 09:41, Giuseppe Filippini wrote: 

> Dear TRNSYS-users,
> 
> I simulated my model with TYPE 71,3,4,9,15 and plotter Type 65 (more information in attachement);
> 
> My time simulation consists in:
> 
> TIME STOP: 24hr
> 
> TIME STEP: 1hr
> 
> And my data reader type 9e reads 24 values of Total Radiation (as a particular day with 24 hr of continuity total radiation) ;
> 
> so my problems are:
> 
> 1. How can I obtain inlet/outlet temperature (in a plotter) from the collector, without the difference between daytime and nighttime of the collector?
> 
> 2. How can I write "Total Radiation data file" in a component to read them in seconds (and not in hours) by the collector TYPE 71?
> 
> Best regards.
> 
> Giuseppe
> 
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