Cond_Horizontal

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:
$UnitSystem SI C Pa J
Fluid$='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=6514 [W/m^2-K]     Nusselt_m=498.8}

Condensation Index