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+clc;clear;
+//Example 11.3
+
+//given data
+mA=0.05;
+P1=0.14;
+P5=0.32;
+P7=0.8;
+h1=239.16;
+h2=255.93;
+h3=55.16;
+h5=251.88;
+h6=270.92;
+h7=95.47;
+
+//calculations
+h4=h3;//throttling
+h8=h7;//throttling
+// E out = E in
+// mA*h5 + mB*h3 = mA*h8 + mB*h2
+mB=mA*(h5-h8)/(h2-h3);
+QL=mB*(h1-h4);
+// W in = Wcomp I,in + Wcomp II,in
+Win=mA*(h6-h5)+mB*(h2-h1);
+COPR=QL/Win;
+disp(mB,'the mass flow rate of the refrigerant through the lower cycle in kg/s');
+disp(QL,'the rate of heat removal from the refrigerated space in kW');
+disp(Win,'the power input to the compressor in kW');
+disp(COPR,'the coefficient of performance of this cascade refrigerator');