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Cond_Horizontal_Cylinder
Procedure Cond_horizontal_Cylinder(Fluid$, T_sat, T_w, D:h_m, Nusselt_m) calculates the heat transfer coefficient and Nusselt number for condensation on a horizontal cylinder in quiescent saturated vapor.
Inputs:
Fluid$ - 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]
Outputs:
h_m - the mean heat transfer coefficient in [W/m^2-K] or [Btu/hr-ft^2-R]
Nusselt_m - the mean Nusselt number [-]
Notes:
This procedure is responsible for determining the property data of the specified fluid. The latent heat of evaporation is modified based on the correction term given in Rohsenow (1998). This correction term accounts for condensate subcooling. The function Cond_Horizontal_Cylinder uses the correlation provided in Rohsenow (1998) as presented in section 7.4.3 of Nellis and Klein.
Example:
$UnitSystem SI C Pa J
$VarInfo h_m units=W/m^2-K
Fluid$='water'
T_sat=100 [C]
T_w=50 [C]
D=0.05 [m]
Call cond_horizontal_cylinder(Fluid$, T_sat, T_w, D:h_m, Nusselt_m)
{Solution:
h_m=6639 [W/m^2-K] Nusselt_m=498.8}
Condensation Index