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//Variable declaration:
//From example 16.10:
U = 350.0 //Over all heat transfer coefficient (W/m^2. C)
DTlm = 74.3 //Log mean temperature driving force for 1-4 shell and tube exchanger ( C)
Q = 788800.0 //Heat load (W)
Nt = 11.0 //Number of tubes per pass
Np = 4.0 //Number of passes
Di = 0.0229 //Inside diameter of tube (m)
pi = %pi
//Calculation:
A = Q/(U*DTlm) //Heat transfer area required for heat exchanger (m^2)
N = Nt*Np //Total number of tubes
L = A/(pi*Di*N) //Tube length (m)
//Result:
printf("The heat transfer area required for the heat exchanger is : %.2f m^2 .",A)
printf("The length of the tubes required for the heat exchanger is : %.1f ft",L*3.28)
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