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clear;
clc;
printf("\t Example 5.12\n");
//horizontal spray with recirculated water . air is cooled and humidified to 34 and leaves at 90percent saturation
T1=65; //dry bulb temperature at the inlet in degree celcius
f=3.5; //flow rate of air in m^3/s
hi=1.017; //humidity of incoming air in kg/kg of dry air
hl=.03; //humidity of leaving air in kg/kg of dry air
k=1.12; //mass transfer coefficient in kg/m^3*s
y1=.017; //molefraction at recieving end
y2=.03; //molefraction at leaving end
//substituting eqn 1st in 2nd we get;
a=2; //cross sectional area of the tower in m^2
d=1.113; //density o fair in kg/m^3
m=(f*d) //mass flow rate of air
gs=m/hi; //air velocity in kg/m^2* hr
ys_bar=.032;
//for recirculation humidifier
z=log((ys_bar-y1)/(ys_bar-y2))*gs/k; //length of the chamber required
printf("\n the length of the chamber required is :%f m",z);
//end
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