Hello,
I found some problems with the type92 in Trnsys16. I checked the
program *.for
One problem is located here :
PERFORM INITIAL TIMESTEP MANIPULATIONS
...
!check the parameters for problems and RETURN if any are found
...
IF((HTREFF.LT.0.).OR.(HTREFF.LT.1.)) CALL TYPECK(-4,INFO,0,4,0)
Well, the second comparison in the parentheses of IF is wrong, it
should be H(TREFF.*GT*.1).
The other problems are located below the ligne of nomber 20. For the
calcul of QAUX and QLOSS. Firstly, let's look at them:
QAUX = (FLOW*CP*(TIN-TOUT)+UA*(TBAR-TAMB))/HTREFF,
QLOSS = UA*(TBAR-TAMB) + (1.d0-HTREFF)*QAUX
Generaly, the environmental temperature is higher than the average
temperature of a chilled fluide, so TBAR-TAMB is less than 0, so for a
electrical compressed chiller, it should take more chaleur. There is
an impression that the ambiante give the chaleur to the fluide.
Finally, the two fomulas shoud be like this:
QAUX = (FLOW*CP*(TIN-TOUT)+UA*(TAMB-TBAR))/HTREFF
QLOSS = (1.d0-HTREFF)*QAUX
That's all.
Aleck (France)
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