Cond_Vertical

Cond_Vertical_Plate

Procedure Cond_vertical_plate(Fluid$, L, W, T_w, T_sat :h_m, Re_L, q, m_dot) calculates the heat transfer coefficient for condensation on a flat vertical plate in quiescent saturated vapor. It also returns the equivalent Reynolds number, heat input and mass flow rate for the condensate film.

Inputs:
Fluid$ - string variable representing a fluid/vapor in the EES data base.
L - length of plate in direction of condensate film flow [m] or [ft]
W - width of the plate [m] or [ft]
T_sat - the saturation temperature of the bulk vapor in [C], [K], [F], or [R].
T_w - the temperature of the plate in [C], [K], [F], or [R].

Outputs:
h_m - the mean heat transfer coefficient in [W/m^2-K] or [Btu/hr-ft^2-R]
Re_L - Reynolds number for condensate film flow [-]
q - total heat transfer from plate to condensate [W] or [Btu/hr]
m_dot - mass flow rate of condensate film [kg/s] or [lbm/min]

Notes:
This procedure is responsible for determining the property data of the specifiedfluid . The latent heat of evaporation is modified based on the correction term developed by Rohsenow (1956). This correction term accounts for the nonlinearity of the temperature profile due to convection effects. The function Cond_Vertical_Plate combines three different correlations applying to three different ranges of Reynolds numbers The correlations are recommended by Butterworth (1981) and partially based off of results determined by Labuntsov (1957) 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
$VarInfo q units=W
Fluid$='water'
L=1 [m]
W=0.25 [m]
T_w=50 [C]
T_sat=100 [C]
Call cond_vertical_plate(Fluid$, L, W, T_w, T_sat :h_m, Re_L, q, m_dot)

{Solution:
h_m=5247 [W/m^2-K]}

Condensation Index