Cond_Horizontal_N

Cond_Horizontal_N_Cylinders

Procedure Cond_horizontal_N_Cylinders(Fluid$, T_sat, T_w, D, N:h_m, Nusselt_m) calculates the heat transfer coefficient and Nusselt number for condensation on a bank of N horizontal cylinders in quiescent saturated vapor, where N is the number of cylinders in the vertical direction.

Inputs:
Fluid$ - string variable representing a fluid/vapor in the EES data base.
T_sat - the saturation temperature of the bulk vapor in [C], [K], [F], or [R].
T_w - the wall temperature of the cylinder in [C], [K], [F], or [R].
D - diameter of cylinder [m] or [ft]
N - number of tubes in the vertical direction

Outputs:
h_m - the mean heat transfer coefficient in [W/m^2-K] or [Btu/hr-ft^2-R] for the tube bank
Nusselt_m - the mean Nusselt number [-] for the tube bank

Notes:
The function discounts the heat transfer coefficient determined with the Cond_horizontal_cylinder function to account for condensate innundation, as described in section 7.4 of Kakaį and Liu (1997) and presented in section 7.4.3 of Nellis and Klein (2009)

Example:
$UnitSystem SI C Pa J
Fluid$='water'
T_sat=100 [C]
T_w=50 [C]
D=0.05 [m]
N=6
call Cond_horizontal_N_Cylinders(Fluid$, T_sat, T_w, D, N:h_m, Nusselt_m)

{Solution: h_m=4833 [W/m^2-K]   Nusselt_m=370}

Condensation Index