[BLDG-SIM] envelope thermal performance

[Drury.Crawley at EE.DOE.GOV]

There is another parametric tool available free
for DOE-2 from  the Deringer Group:

http://www.deringergroup.com/Software/DOE2Parm/DOE2Parm.htm



                                                                                                           
                      "Monjur M                                                                            
                      Mourshed"                To:       BLDG-SIM at GARD.COM                                 
                      <monjur at ecaad.com        cc:                                                         
                      >                        Subject:  [BLDG-SIM] envelope thermal performance           
                      Sent by:                                                                             
                      postman at gard.com                                                                     
                                                                                                           
                                                                                                           
                      03/03/2003 12:08                                                                     
                      PM                                                                                   
                      Please respond to                                                                    
                      monjur                                                                               
                                                                                                           
                                                                                                           




Hi Nesen





Two approaches for your solution:





1. Parametric Runs of Energy Simulation


You can use Energy Simulation software to run the same file changing
parameters of your choice, hence it is called parametric runs. You can run
your input file parametrically using EnergyPlus. This can be big and time
consuming. And it is impossible to visualize such problems with more than 2
design and 1 response variables. Anyway, there are different ways you can
do it:


         a.      Using MS-DOS batch file


         b.      Using available interfaces


         c.      Design your own interface to existing simulation software





2. Use formal optimisation techniques


So far, it is more realistic way to deal with a number of variables. BUT
you have to be proficient enough on optimisation techniques and formulation
of the problem. Result can be tricky enough if you don't model your problem
properly. See Louisa Gama Caldas's paper on this: Caldas, L.G., Norford,
L.K. 2002. "A design optimization tooll based on a genetic algorithm"
Automation in Construction, Vol. 11, pp 173-184.





GenOpt by Michael Wetter can be of help. Go to:
http://simulationresearch.lbl.gov/GO . You can use different types of
algorithms to optimise the façade. GenOpt also claims to be able to do
parametric runs. One thing you need to remember, GenOpt is not only for
environmental design optimisation. It is rather generic ? you can couple
any ASCII file based simulation software. Its free but I am not sure of
other aspects. There are a lot of commercial optimisation software
available to suit your need. These algorithms are tested, robust and will
give you better results than "available free codees". Such a software may
be VisualDOC (http://www.vrand.com). To gain a comprehensive idea of
optimisation and its application try visiting NEOS server on optimisation.
ParamPlus claims to do parametric energy simulations. Check it.





I have done some coding to do parametric and optimisation runs. These are
still in alpha release and sorry that I cant share it right now. But if you
are stuck, don't hesitate to write.





Regards,





Monjur Mourshed














      -----Original Message-----
      From: postman at gard.com [mailto:postman at gard.com] On Behalf Of Nesen
      Surmeli
      Sent: 03 March 2003 09:41
      To: BLDG-SIM at GARD.COM
      Subject: [BLDG-SIM] envelope thermal performance





      hi everybody


      I have been following the discussions for a while and I hope to get
      some help. I am a graduate student in architecture studying on
      thermal performance of building  facades. I will work on an existing
      office building and try to find optimum facade properties  by
      altering the envelope compositions (changing wall materials and
      thicknesses, glazing properties, etc.) in a computer program.


      I will be glad if you have any advices on which program to use for
      this study. I have been examining a few but couldn't find a
      satisfying one as far as I will only deal with envelope properties.


      hope there is somebody to help me.


      Nesen Surmeli








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