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Didier, I assume that you are working from the example of using GenOpt and TRNSYS with Type56 (http://sel.me.wisc.edu/trnsys/demos/genopt-type56.pdf). If not, that will give you some good direction. If I understand correctly what you are trying to do, you need to identify the material properties of your outside wall with variable names that will be replaced by GenOpt in the *.bui file at each simulation run. It might look something like: *-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- * L a y e r s *-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- LAYER GYPSUM CONDUCTIVITY= 2.62 : CAPACITY= 0.75 : DENSITY= 1601 LAYER INSULATION CONDUCTIVITY= %kInsul% : CAPACITY= %capInsul% : DENSITY= %rhoInsul% LAYER STUCCO CONDUCTIVITY= 2.49 : CAPACITY= 0.75 : DENSITY= 1858 You also need to define something to minimize and that will probably not change from the example. The example uses the integrated whole-building annual energy use as its minimization variable. You can follow section 5.2.4 in the *.pdf. Best, david On 6/18/2010 09:42, gossard@cict.fr wrote: Hi all, I want to minimize the total energy-consuming of a building by varying the thermal characteristics of the outside wall (density, thermal conductivity and specific heat). I use GenOpt and TRNSYS for that but I encounter some difficulties. I refered to the given example and I started with the same building modelisation for my problem.I do not know how integrate variables for density, thermal conductivity and specific heat in .bui template file. Could someone help me please ? Best regards, Didier Gossard from France. ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program. _______________________________________________ TRNSYS-users mailing list TRNSYS-users@cae.wisc.edu https://www-old.cae.wisc.edu/mailman/listinfo/trnsys-users -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |