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+clc;clear;
+//Example 8.8
+
+//given data
+T0=20+273;//in K
+P1=0.14;
+T1=-10;
+P2=0.8;
+T2=50;
+
+//the properties of refrigerant
+//at inlet
+h1=246.36;
+s1=0.9724;
+//at outlet
+h2=286.69;
+s2=0.9802;
+dO=h2-h1-T0*(s2-s1);// O refers to exergy
+dO=round(dO);
+disp(dO,'the exergy change of the refrigerant in kJ/kg')
+wmin=dO;
+disp(wmin,'the minimum work input that needs to be supplied is in kJ/kg')