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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 |