In the commercial production of sugar (sucrose), the product crystals are washed and centrifuged to partial dryness. the crystals are then sent through a rotary dryer where they are contacted with a hot stream of air that reduces the moisture content from 1: 0 wt% to 0: 1 wt%. the ratio of wet sugar to inlet air fed to the dryer is 3.3 kg wet sugar/kg inlet air. the inlet air contains 1.5 mole% water. (a) draw and label the flowchart and do the degree-of-freedom analysis

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.