2. Determine the mass transfer coefficient (km) from a tray full of water. Air at a...

Transcribed Image Text:

2. Determine the mass transfer coefficient (km) from a tray full of water. Air at a velocity of 2 m/s is flowing over the tray. The temperature of water and air is 25C. The width of the tray is 25 cm and its length along the direction of air flow is 20 cm. The diffusivity of water vapour in air is D =0.26 x 10- 4m²/s. The kinematic viscosity of air (at 25C) is 16.14 x 10-6m²/s. The relative humidity of air is 50%. 2. Determine the mass transfer coefficient (km) from a tray full of water. Air at a velocity of 2 m/s is flowing over the tray. The temperature of water and air is 25C. The width of the tray is 25 cm and its length along the direction of air flow is 20 cm. The diffusivity of water vapour in air is D =0.26 x 10- 4m²/s. The kinematic viscosity of air (at 25C) is 16.14 x 10-6m²/s. The relative humidity of air is 50%.