Solve the below:
Q: A horizontal tube 1 m long with a surface temperature of 70°C is used to condense saturated steam at 1 atm.
(a) What diameter is required to achieve a condensation rate of 125 kg/h?
(b) Plot the condensation rate as a function of surface temperature for 70 = T = 90°C and tube distracters of 125, 150, 175 mm.