[TRNSYS-users] IAM (incidence angle modifier) using TESS Type538
giulio betti
giulio.betti at gmail.com
Mon Jan 12 13:24:46 PST 2009
Dear Matt,
thank you for your efforts. Will I have only to replace the old ***.DLL file
with the new one you will send me?
Second question about my old projects, i.e. the files ***.tpf I made with
the old ***.DLL file: will they work? Or will I have to create them again?
Thanks,
Giulio Betti
2009/1/9 Matt Duffy <duffy at tess-inc.com>
> Dear Giulio,
>
> After reconsidering and as one of my colleagues so kindly brought to my
> attention, this still will not function properly if you simply change the
> parameters. Please let me send you a new DLL after I recompile the new
> source code
>
> Best regards,
>
> Matt Duffy
>
>
>
> ----- Original Message -----
> From: "Matt Duffy" <duffy at tess-inc.com>
> Sent: Fri, January 9, 2009 14:07
> Subject:Re: [TRNSYS-users] IAM (incidence angle modifier) using TESS
> Type538
>
> Dear Giulio,
>
> After looking at the source code for Type538, I realized that the NX
> arrary for the DYNAMICDATA utility routine was backwards..
> "NX(1)=NTRNS
> NX(2)=NLONG
> CALL DYNAMICDATA(LUIAM,2,NX,1,X,Y,INFO,*20)"
>
> The correct fix would be...
>
> "NX(2)=NTRNS
> NX(1)=NLONG"
>
> In the mean time for a temporary fix, yes, you max switch the parameter 11
> and 12 in the proforma. If you have an equal number of transversal and
> longitudinal angles, this will not be a problem.
>
> I apologize for any inconvenience. Thank you for bringing this to our
> attention.
>
>
>
> Best regards,
>
> Matt Duffy
> Technical Support Team
> Thermal Energy System Specialists
> 22 N Carroll, Suite 300
> Madison, WI 53703
> duffy at tess-inc.com
>
> ----- Original Message -----
> From: "giulio betti" <giulio.betti at gmail.com>
> Sent: Tue, January 6, 2009 10:38
> Subject:Re: [TRNSYS-users] IAM (incidence angle modifier) using TESS
> Type538
>
> Ok, here they are.
> The transversal IAM are provided for 0° (=1), 20° (=1.02), 40° (=1.03),
> 60°
> (=0.89), 90° (=0), whiIe the longitudinal IAM are provided for 0° (=1),
> 50°
> (=0.92), 90° (=0).
> I have to add another information: I tried to use the same file .dat with
> Type71, setting 3 in parameter 10 [Number of longitudinal angles for which
> IAMs are provided] and 5 in parameter 11 [Number of transverse angles for
> which IAMs are provided] and it works. So, for this collector it seems the
> documentation is right, while with Type538 there is the problem I described
> in the other email.
> Maybe the simpliest explanation is that in Type538 parameter 11 should be
> named "Number of longitudinal angle" and parameter 12 "Number of transverse
> angle"...or maybe I'm making some mistake...
> Thank you very much,
> regards,
> Giulio
> 2009/1/6 David Bradley <bradley at tess-inc.com>
>
> > Giulio,
> > Could you please send me your project (*.tpf file) and your IAM file? I
> > will try to find the cause of the error and then make sure that there is
> not
> > a mistake in the documentation!
> > Kind regards,
> > David
> >
> >
> > giulio betti wrote:
> >
> > dear all,
> > I'm using Type538 (TESS Solar Library, Evacueted tube collectors) at
> > university. I have a problem with IAM: I read the posts about it on this
> > mailing list and the chapter 5.11.14.4 of the Trnsys16 manual, so I think
> > I've understood how to use it. I made the external data file needed by
> > subroutine DYNAMICDATA as explained in the manual:
> >
> > <Transversal angle 1> <Transversal angle 2> etc. Nt values [0;90]
> >
> > <Longitudinal angle 1> <Longitudinal angle 1> etc. Nl values [0;90]
> >
> > <IAM 1 1> IAM for transv. angle 1, long. angle 1
> >
> > <IAM 1 2> IAM for transv. Angle 1, long. angle 2
> >
> > ...
> >
> > <IAM 1 Nl> IAM for transv. angle 1, long. angle Nl
> >
> > <IAM 2 1> IAM for transv. angle 2, long. angle 1
> >
> > <IAM 2 2> IAM for transv. angle 2, long. angle 2
> >
> > ...
> >
> > <IAM 2 Nl> IAM for transv. angle 2, long. angle Nl
> >
> > <IAM 3 1> IAM for transv. angle 3, long. angle 1
> >
> > ...
> >
> > <IAM Nt Nl> IAM for transv. angle Nt, long. angle Nl
> >
> > Having 5 transversal angles [0°, 20°, 50°, 70°, 90°] and 3
> longitudinal
> > angles [0°, 50°, 90°] my file .dat is something like this (I don't
> write all
> > 15 values of the column):
> >
> > 0 20 50 70 90
> >
> > 0 50 90
> >
> > 1
> >
> > 0.95
> >
> > 0
> >
> > .
> >
> > .
> >
> > .
> >
> > 0
> >
> > In Type538 I set parameter 11 (Number of transverse angles) to 5 and
> > parameter 12 (Number of longitudinal angles) to 3. Now, I tried to run
> the
> > simulation: Trnsys didn't work: it said that there was an error without
> > specifing details:
> >
> > Fatal Error at time : 3245.010000
> > Generated by Unit : 3
> > Generated by Type : 538
> > TRNSYS Message 109 : Error reading data stored in logical unit.
> > NOTE: the reported logical unit number may be automatically or internally
> > ASSIGNed, or you may have specified the incorrect number of independent
> > variables.
> > Reported information : Logical Unit number 33
> >
> >
> > So I tried to change parameter 11 and parameter 12: I set parameter 11 to
> 3
> > and parameter 12 to 5 (I simply reversed the number of transversal angles
> > with the number of longitudinal angles). In this way the simulation ran!
> >
> > So the question is this: the file .dat has to be written as described in
> > the manual, and there is only an inversion in the definitions of
> "parameter
> > 11" and "parameter 12", so that the only change to do is the one
> described
> > above?
> >
> > Or the definitions of "parameter 11" and "parameter 12" are right and
> there
> > is to change the file .dat putting in the first line the longitudinal
> angles
> > and in the second line the transversal angles? In this case, the column
> with
> > all the possible multiplications is to be left as it is described in the
> > manual, or I have to modify it in this way:
> >
> > <IAM 1 1> IAM for long. angle 1, transv. angle 1
> >
> > <IAM 1 2> IAM for long. Angle 1, transv. angle 2
> >
> > ...
> >
> > <IAM 1 Nl> IAM for long. angle 1, transv. angle Nl
> >
> > <IAM 2 1> IAM for long. angle 2, transv. angle 1
> >
> > <IAM 2 2> IAM for long. angle 2, transv. angle 2
> >
> > ...
> >
> > <IAM 2 Nl> IAM for long. angle 2, transv. angle Nl
> >
> > <IAM 3 1> IAM for long. angle 3, transv. angle 1
> >
> > ...
> >
> > <IAM Nt Nl> IAM for long. angle Nt, transv. angle Nl
> >
> > ?
> >
> > I hope I've been clear enough, thank you all,
> >
> > regards,
> >
> > Giulio Betti
> >
> > ------------------------------
> >
> > _______________________________________________
> > TRNSYS-users mailing
> listTRNSYS-users at cae.wisc.eduhttps://
> www-old.cae.wisc.edu/mailman/listinfo/trnsys-users
> >
> >
> > --
> > ***********************************************************************
> > Thermal Energy System Specialists (TESS), LLC
> > David BRADLEY 22 N. Carroll Street - Suite 370
> > Partner Madison, WI 53703
> > USA
> > P: +1.608.274.2577
> > F: +1.608.278.1475
> > E-mail: bradley at tess-inc.com
> > Web Pages: http://www.tess-inc.com and http://www.trnsys.com
> >
> > ***********************************************************************
> >
> >
>
>
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>
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