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+//Variable declaration:
+//From example 16.22:
+t2 = 75.0                       //Temperature of water leaving the shell ( F)
+t1 = 35.0                       //Temperature of water entering the shell ( F)
+T2 = 75.0                       //Temperature of oil leaving the tube ( F)
+T1 = 110.0                      //Temperature of oil entering the tube ( F)
+U = 320.0                       //Overall heat transfer coefficient (W/m^2.K)
+A = 19.5                        //Required heat transfer area (m^2)
+Cmin = 4736.0                   //Minimum capacitance rate (W/K)
+
+//Calculation:
+DT1 = t2-t1                     //Actual water temperature change ( F)
+DT2 = T1 - t1                   //Maximum water temperature change ( F)
+E = DT1/DT2                     //Effectiveness
+NTU = (U*A)/Cmin                //Number of transfer units
+
+//Result:
+printf("The effectiveness is : %.3f .",E)
+printf("The NTU is : %.3f",NTU)