Using .mexw64 in a Matlab function

Hi,

I'm trying to simulate a Rankine Cycle in Matlab. To calculate the water properties, I'm using the coolprop package http://www.coolprop.org/coolprop/wrappers/MATLAB/index.html#matlab.

I wrote a script (see below) and it works perfectly. Now, I want to rewrite it into a Matlab function in orden to simulate the cycle with the Simulink block MATLAB function, but it doesn't work: "Only MATLAB files are supported for code generation. Unsupported file extension 'mexw64' for C:\....".

What can I do?

Here's the script I want to rewrite into a function:

 clear all
 clc 
 close all

 %COOLPROP
 addpath('C:\Program Files\MATLAB\R2015b')

 % 1:
 P1 = 8e6
 Q1 = 1
 H1 = CoolProp.PropsSI('H','P',P1,'Q',Q1,'Water')
 S1 = CoolProp.PropsSI('S','P',P1,'Q',Q1,'Water')
 T1 = CoolProp.PropsSI('T','P',P1,'Q',Q1,'Water')

 % 2:
 display('Propiedades del agua a la entrada del condensador')
 S2 = S1
 P2 = 0.008e6
 T2 = CoolProp.PropsSI('T','P',P2,'S',S2,'Water')
 H2 = CoolProp.PropsSI('H','P',P2,'S',S2,'Water')

 % 3:
 P3 = P2
 Q3 = 0
 H3 = CoolProp.PropsSI('H','P',P3,'Q',Q3,'Water')
 S3 = CoolProp.PropsSI('S','P',P3,'Q',Q3,'Water')
 T3 = CoolProp.PropsSI('T','P',P3,'Q',Q3,'Water')

 % 4: 
 S4 = S3
 P4 = P1
 H4 = CoolProp.PropsSI('H','P',P4,'S',S4,'Water')
 T4 = CoolProp.PropsSI('T','P',P4,'S',S4,'Water')

 % MORE 
 Wt_m = H1 - H2;
 Wp_m = H4 - H3;
 Qin = H1 - H4;
 Wc = 100e6*3600;
 nu = 100 * (Wc/Qin)

Answer 1

[Shruti Sapre]

Hi Ana,

The below link may be helpful to resolve the issue. The functions may need to be declared using coder.extrinsic since the coolprop package seems to use mex files:

http://www.mathworks.com/matlabcentral/answers/68002-how-to-use-mex-files-in-matlab-function-block

Hope this helps!

-Shruti