ABSTRACT
Heat transfer coefficients for fluids flowing over tube bundles are calculated for a staggered arrangement of tubes. The equation is
Expanding Eq. (1) to include the terms making up the dimensionless numbers, defining the tube diameter in inches, and rearranging gives
where cp = fluid specific heat, Btu/lb-OF d = tube outside diameter, in. G = mass velocity, Ib/h . ft2 h = heat transfer coefficient, Btu/h ft2 • OF k = thermal conductivity, Btu/h ft2 • (OF/ft) J1 = fluid viscosity, lb/ft h = 2.42 cP
\\ \ \\ I\~ ,'
Fluid properties shown in Eq. (2) are combined into a single term as follows:
Then the heat transfer is calculated by using
where the value for F for some common gases can be obtained directly from Figs. 1-12.
