Water flows down the inside wall of a 25-mm-ID wetted-wall tower of the design of Figure 2.4, while air flows upward through the core. Dry air enters at the rate of \(7 \mathrm{~kg} / \mathrm{m}^{2} \cdot \mathrm{s}\). Assume the air is everywhere at its average conditions of \(309 \mathrm{~K}\) and \(1 \mathrm{~atm}\), the water at \(294 \mathrm{~K}\), and the mass-transfer coefficient constant. Compute the average partial pressure of water in the air leaving a tower 1-m-long.

Figure 2.4:-

Transcribed Image Text:

Liquid out Gas Liquid in Feed reservoir Pipe wall Liquid film Wetted-wall section Calming section Figure 2.4 Wetted-wall tower.