- Problem 2 Continued C You Are Drying A Slab Of Material At 65 C And 1 Atm With Air At 2 Humidity Flowing At A Velocit 1 (29.35 KiB) Viewed 47 times
- Problem 2 Continued C You Are Drying A Slab Of Material At 65 C And 1 Atm With Air At 2 Humidity Flowing At A Velocit 2 (70.93 KiB) Viewed 47 times
Problem 2 continued c) You are drying a slab of material at 65 °C and 1 atm with air at 2% humidity flowing at a velocity of 1.5 m/s. Estimate the drying rate in the constant rate regime by determining the mass transfer coefficient(ky) for flow across a flat plate. (20 points) Length of slab: L = 0.5 m Air density: P = 1.045 kg/m Air viscosity: u = 20.21 x 106 Pas Diffusivity of water in air: Das = 0.288 cm/s at 42 °C MWar = 28.97 You may assume that yem = 1 .
a) In a drying process, you measure the wet and dry bulb temperatures to be 51 °C and 89 °C respectively. Determine the humidity and percentage humidity (5 points) 0.15 adiabatic saturation curve 0.14 0.13 percentage humidity 0.12 011 0.10 0.09 0.08 LITT 0.07 Humidity, H (kg water vapor/kg dry air) 006 0.05 0.04 0.03 VIT 0.02 T 0.01 - 0 10 30 40 60 70 80 90 100 110 0 130 120 Temperature (°C) b) A sample of wet material weighs 20.0 kg. The same sample weighs 12.3 kg when completely dry. The equilibrium water content under the drying conditions of interest is 15.8 kg H,0/100 kg dry solid. Determine the actual moisture content and the free moisture content in units of kg H2O/kg dry solid. (5 points)