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+//scilab 5.4.1
+clear;
+clc;
+printf("\t\t\tProblem Number 10.13\n\n\n");
+// Chapter 10 : Refrigeration
+// Problem 10.13  (page no. 536) 
+// Solution
+
+//A VACUUM REFRIGERATION SYSTEM 
+//A vacuum refrigeration system is used to cool water from 90F to 45F
+h1=58.07; //Unit:Btu/lbm //enthalpy
+h2=13.04; //Unit:Btu/lbm  //enthalpy
+h3=1081.1; //Unit:Btu/lbm //enthalpy
+m1=1; //mass //unit:lbm
+//m2=1-m3 //unit:lbm
+//Now, m1*h1 = m2*h2 + m3*h3
+//Putting the values and arranging the equation,
+m3=(m1*h1-h2)/(h3+h2); //The mass of vapour that must be removed per pound //unit:lbm
+printf("The mass of vapour that must be removed per pound of entering water is %f lbm",m3);
+
+