[TRNSYS-users] some problems found with the type92 in Trnsys16

[Diego A. Arias]

Dear Aleck,

Thank you very much for finding these errors. We will make these changes 
in the next release.
Best regards,

Diego


Yujun TAO wrote:
> 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)
>
> ------------------------------------------------------------------------
> Ne gardez plus qu'une seule adresse mail ! Copiez vos mails 
> <http://www.trueswitch.com/yahoo-fr/> vers Yahoo! Mail
> ------------------------------------------------------------------------
>
> _______________________________________________
> TRNSYS-users mailing list
> TRNSYS-users at engr.wisc.edu
> https://www.cae.wisc.edu/mailman/listinfo/trnsys-users
>   


-- 
Diego A. Arias
TRNSYS Coordinator
Solar Energy Laboratory
University of Wisconsin - Madison
1500 Engineering Drive
Madison, WI 53706