A laboratory test was conducted with a small, tubular-bowl centrifuge on a fermentation broth. At the operating conditions, a sigma value of 7,400 ft2 was computed, with a measured volumetric flow rate of 0.11 gpm. For the commercial plant that will process the same broth, the largest tubular-bowl centrifuge available has the following characteristics: bowl speed = 15,000 rpm, R0=5 cm, R1=2 cm, and bowl length = L = 10 cm. Using the sigma scale-up theory, calculate how many gpm this unit can process.

Calculate the mean flame height of a liquid pool with a circular diameter of 1.0m. Assume the liquid is ethyl acetate and has a heat release rate of 2.48 MW

QUESTION #1 (a.) A power of 5 kW is supplied to a machine crushing material at the rate of 0.5 kg/s from 12.5 mm cubes to a product having the following sizes: 60 per cent 3.175 mm, 20 per cent 2.5 mm and 20 per cent 2.25 mm. What power should be supplied to this machine to crush 0.3 kg/s of the same material from 8.5 mm cube to 3.0 mm cube? (assume Bond's law applies) (b.) If crushing rolls 1.5 m diameter are set so that the crushing surfaces are 15 mm apart and the angle of nip is 27°, what is the maximum size of particle which should be fed to the rolls?

J 5 A still which produces ethanol from corn mash. Edgar wants to condense the ethanol by running it though a copper tube. If the copper tube can transfer 0.6 btu per second and Edgar wants to produce 10 fifths of ethanol per hour, how long should the tube be?