Julien,
Before you go in and make changes to Type533 - which would mean you can’t use the plug-ins any longer - have you considered a work-around? 533 assumes the heat transfer from the edges of the node is:
Qloss = Uedge * SAedge*(Tnode - Tenv)
In your case, Uedge is fixed as a parameter but Tenv is an input. You could simply manipulate Tenv to give you the desired losses:
Unew*(Tnode-Tnew) = Uedge*(Tnode-Tenv)
then
Tnew = Tnode - Uedge/Unew*(Tnode-Tenv)
You might want to use Tnode from the previous timestep so you don’t run into convergence issues.
I wrote 533 and while it’s not overly hard to make that internal parameter/input change, there is a lot of manipulations you’ll have to do. You’ll also have to save it as a new type number so that you won’t have any issues loading your version instead of our version.
But I’m curious - why the need for variable edge losses? Are you concerned about long-wave radiation? Do you want to study natural convection off the surfaces? Is it exposed to a lot of wind?
Jeff - TESS
Sent from my iPhone
On Nov 6, 2020, at 8:41 AM, Julien Gambade via TRNSYS-users <trnsys-users@lists.onebuilding.org> wrote:
_______________________________________________Thanks for your answer.I just have a problem. My version of TypeStudio can't open Type533.for and it gives me this message :<154255>I have the latest versionf of Trnsys.Does anyone know a solution ?Best regardsDe: "David BRADLEY" <d.bradley@tess-inc.com>
À: "trnsys-users" <trnsys-users@lists.onebuilding.org>
Cc: "Julien Gambade" <julien.gambade@univ-ubs.fr>
Envoyé: Jeudi 5 Novembre 2020 16:44:11
Objet: Re: [TRNSYS-users] Surface Loss Coefficients Type 533 Horizontal Cylinder TankJulien,
Changing parameters to inputs requires that you modify the source code of the Type and recompile it into a new DLL. The source code for Type533 is in the .\Tess Models\SourceCode\ directory and TRNSYSv18 has a Fortran compiler built into it so in theory you should be able to use the TypeStudio to make the changes that you need. I say "in theory" because Type533 is a fairly complicated piece of code and it may not be a trivial process to modify and recompile.
kind regards,
David
On 11/05/2020 09:17, Julien Gambade via TRNSYS-users wrote:Hello,I am using Type 533 Horizontal Cylinder Tank from Tess Library. I would like to define Surface Loss Coefficients as inputs instead of a parameters.I can't assign a variable name and I would prefer to avoid modifying the source code.Does anyone know a solution ?Thank you in advance,Best regards--Julien GAMBADE
Doctorant
Institut de Recherche Dupuy de Lôme (UMR CNRS 6027)
Centre de recherche Christian Huygens
Rue de Saint-Maudé - 56100 Lorient - France
julien.gambade@univ-ubs.fr
www.irdl.fr_______________________________________________ TRNSYS-users mailing list TRNSYS-users@lists.onebuilding.org http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org-- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 3 North Pinckney Street - suite 202 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com--Julien GAMBADE
Doctorant
Institut de Recherche Dupuy de Lôme (UMR CNRS 6027)
Centre de recherche Christian Huygens
Rue de Saint-Maudé - 56100 Lorient - France
julien.gambade@univ-ubs.fr
www.irdl.fr
TRNSYS-users mailing list
TRNSYS-users@lists.onebuilding.org
http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org