1. Saturated steam at 1.5 bars condenses inside a horizontal, 75-mm-diameter pipe whose surface is main- tained at 100°C. Assuming low vapor velocities and film condensation, estimate the heat transfer coefficient and the condensation rate per unit length of the pipe.
2. Consider the situation of Problem 10.67 at relatively high vapor velocities, with a fluid mass flow rate of m = 2.5 kg/s.
(a) Determine the heat transfer coefficient and condensation rate per unit length of tube for a mass fraction of vapor of X = 0.2.
(b) Plot the heat transfer coefficient and the condensa- tion rate for 0.1 X 0.3.