Thread Subject:

Simscape Variable coefficient for Convective Heat Transfer ( ssc_build)

Hello

I´m modelling a PV/T with Matlab_2012a Simscape for Mac.

I think that there is a way to have variable heat transfer coefficient in the convective heat transfer model of Simscape. I tried to set the coefficient to a variable, as I saw on another thread, but I got an error with the ssc_build.

I followed the instructions as I saw on:

http://www.mathworks.com/matlabcentral/newsreader/view_thread/298382


My script was:
-------------------------------------------------------------------------------------------
component convection < foundation.thermal.branch
% Convective Heat Transfer
% The block represents an energy transfer by convection between two
% bodies by means of fluid motion. The transfer is governed by the Newton
% law of cooling and is directly proportional to the convection heat
% transfer coefficient, surface area, and the temperature difference.
%
% Connections A and B are thermal conserving ports associated
% with the points between which the energy transport by convection takes
% place. The block positive direction is from port A to port B. This means
% that the heat flow is positive if it flows from A to B.

% Copyright 2005-2008 The MathWorks, Inc.
 
  inputs
    heat_tr_coeff = { 20, 'W/(m^2*K)' }; % heat_tr_coeff: left
  end
    
  parameters
    area = { 1e-4, 'm^2' }; % Area
  end
       
  function setup
    % Parameter range checking
    if area <= 0
      pm_error('simscape:GreaterThanZero','Area')
    end
    if heat_tr_coeff <= 0
      pm_error('simscape:GreaterThanZero','Heat transfer coefficient')
    end
  end

  equations
    Q == area * heat_tr_coeff * T;
  end

end
-----------------------------------------------------------------------------------------------------------
 

And the ERROR was:
----------------------------------------------------------------------------------------------------------
>> ssc_build
Generating Simulink library 'foundation_lib' in the MATLAB package parent directory '/Applications/MATLAB_R2012a.app/toolbox/physmod/simscape/library/m' ...
Failed to generate 'foundation_lib'

Caused by:
    'foundation' is a MathWorks' provided MATLAB package. Building MathWorks'
    provided libraries is not supported.
 -----------------------------------------------------------------------------------------------------------

Anyone could help me to solve this error?

Thanks