Solutions%20to%20Homework#5

Solutions%20to%20Homework#5 - Assignment Solution 5...

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Unformatted text preview: Assignment Solution 5 Chemical Engineering 2800 (Summer 2008) Fundamentals of Process Engineering University of Utah Dr.Mataz Alcoutlabi Problem 1 12.6, p. 381. Cereal is being dried in a vertical drier by air flowing countercurrent to the cereal. To prevent breakage of the cereal flakes, exit air from the drier is recycled. For each 1000 kg/hr of wet cereal fed to the drier, calculate the input of moist fresh air in kg/hr and the recycle rate in kg/hr. Data on the stream compositions (Note that air compositions are given as mole fractions and cereal compositions are given as weight fractions.): Fresh air Wet cereal Exit air Dried cereal Air entering drier H 2 O 0.0132 0.200 0.263 0.050 0.066 Solution Drier Splitter Mixer 1 2 3 5 4 6 Wet cereal 1000 kg/h Dry cereal Exit air Fresh air 200 . 2 = O H 050 . 2 = O H 263 . 2 = O H y 066 . 2 = O H y Recycle 263 . 2 = O H y 263 . 2 = O H y 0132 ....
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Solutions%20to%20Homework#5 - Assignment Solution 5...

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