[esp-r] Re: PCM Model - SPMCMP56

[Achim Geissler]

Dear Ali

attached is a mscomp.db1 with an entry for SPMCMP56 (if it comes past the filter). However, the tough part of the model is to find a good set of parameters for the PCM melting and solidification curves. If you have MathCAD at hand, I would be willing to share our (unsophisticated) parameter-finding approach - with the string attached that I would expect some kind of feedback on your experience with the model (if and when you get it to work for you).

Also, here is a set of "proven" coefficients:

# Node No:  2
PCM_t56          # label
# Zone Surf Node Type Opq/Trn
   3  10   2  56   1
# No. of data items.
  21
# Data:
  0.1750E+02  0.2250E+02  0.1000E+01  0.2000E+00  0.2000E+00  0.1354E+04  0.1317E+04  0.2514E+05  1.0000E+00 -6.973E-01  
 -9.0519E-02 8.4889E-02 2.0499E-03 -2.342E-03 -3.4758E-01 -9.9162E-01 -9.6004E-02 1.0735E-01 2.3089E-03 -2.8074E-03  
 -1.2793E-02


Best
Achim




On Feb 9, 2012, at 9:10 PM, Ali Fallahi wrote:

> Dear all,
>  
> I am trying to model PCM’s thermal behavior using ESP-r. I already have DSC testing data and would like to include sub-cooling effect in simulation. As I understood from the mailing list, ESP-r has several PCM models available in the standard source-code (SPMCMP53, 54, 55 & 56). SPMCMP56 is an enhanced model, taking into account the sub-cooling effect. To activate this  model, several lines should be added to mscomp.db1 file.
>  
> - Is there anyone who has a mscomp.db1 file with added activating lines already included for SPMCMP56?
> - What are the other required steps after replacing/editing the mscomp.db1 file in the /esp-r/database directory?
>  
> Thank you in advance for your help.
>  
> Regards,
>  
> Ali Fallahi, Ph.D., LEED Green Associate
> Member of the Technical Staff - Building Science Engineer
> Building Energy Efficiency Group
> 
> Fraunhofer Center for Sustainable Energy Systems CSE
> 25 First Street
> Cambridge, MA 02141, U.S.A.
> Direct: +1 617-575 7259
> Fax: +1 617-588 0618
> afallahi at fraunhofer.org
> http://cse.fraunhofer.org
>  
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achim.geissler at intergga.ch




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