Page 136 - Industrial Ventilation Design Guidebook
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98 CHAPTER 4 PHYSICAL FUNDAMENTALS
Alternatively, we can write the energy balance with the help of the en-
thalpy flows as
where dn^ = ri\• dx, where dx is the humidity change of the airflow. Then we
can write
From Eq, (4.151) we see that in a dampening process the state of air tends to
change toward the saturated air state corresponding to the surface temperature of
the water. We will now solve the Eq. (4.151) approximately. First we state that
Integrating the equation above, we obtain
