Re: [TRNSYS-users] Converting data reader to TRNSYS 16

[David Bradley <bradley@tess-inc.com>]

Steve,
 If you are reading a standard TMY file (either TMY, TMY2, or the
old TRNSYS TMY format), I would suggest that you replace Type9 with
Type15. Type15 combines the functionality of Type89 (which reads standard
format files such as TMY2 and TRNSYS TMY) with Type16 and Type69. It
avoids some of the problems of setting Type16 parameters correctly and of
making connections between those components. Also, be sure that you
changed the start time of your simulation. The TRNSYS 15 convention was
that the start time was the hour of the year at the end of the first time
step (although often you had to tweak this around to get it to actually
work correctly). In TRNSYS 16, the start time is the hour of the year at
the beginning of the first time step. I hope that helps.
David


At 12:20 5/28/2007, Steven Long wrote:
> Hi:
>  
> I?m converting a series of decks to TRNSYS 16.  When I run the decks
> using TRNSYS 16 source code with the deck version as ?15?  I don?t
> get any radiation or data problems, beyond the warning about the new
> start time convention.  My results are similar to TRNSYS 15.
>  
> I then converted the decks to ?version 16? and made the changes to the
> type 9 that are described in the user manual.  I?m using TMY data
> for the entire year, but I?m not using all columns of the entire TMY
> file, so I?m not using the default TMY reader mode.  Now when I run
> these decks, I got the following results:
>  
> 1.
>                   
> Many type 16 errors due to radiation exceeding the
> SC.
> 2.
>                   
> A minimum collector temperature that is below
> anything in the data file.
> 3.
>                   
> Similar overall results to TRNSYS 15.
>  
> My  type 9 is as follows:
>  
> (Idn=input 2,ih= input 3)
>  
> UNIT 1 TYPE 9 DATA READER
> PARAMETERS 34
> 3 0 7 1 
> 1 1 0 0
> -2 1 0 0
> -3 1 0 0
> 4 1 0 0
> 5 1 0 0
> 6 1 0 0
> 7 1 0 0
> 10 -1
>  
> I have tried various modes and get similar errors.  If I add one
> ?starter? line to the TMY file and change to mode 5/6, I get fewer
> radiation errors.
>  
> I also looked at type 16 and it appeared that this changed as well:
>  
> UNIT 66 TYPE 16 RADIATION PROCESSOR
> PARAMETERS 9
> * RADMODE TRACKMODE TILTMODE
> DAY       
> LAT       
> SC        
> SHFT       SMOOTH
> 4        
> 1        
> 2        ZSTARTDAX1 GLATITUDC1
> XSOLARCOC1 ZSHIFTLOC1 2
> * IE
> -1
> INPUTS 7
> * I       
> IDN       
> TD1       
> TD2       
> RHOG      
> BETAI      GAMMAI
> 1,3 1,2 1,99 1,100 0,0       
> 0,0        0,0
> 0         
> 0         
> 0         
> 0          ZGROUNDRC1
> GCOLSLOPC1 GCOLAZIMC1
>  
> It appears that the smooth mode is no longer used and
> the last parameter should be -1.  Looking at the documentation, it
> was unclear what inputs 3 and 4 should be as they are listed as 19,20 in
> type 16, but the older convention of 99,100 is still indicated in the
> type 9 documentation.
>  
> Do you have any ideas as to what I may be doing wrong?
>  
> Thanks,
>  
>  
> Steven Long
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users@engr.wisc.edu
> https://www.cae.wisc.edu/mailman/listinfo/trnsys-users

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