7. (15 pts) A hot air popcorn popper operates by blowing air though the popping chamber, fluidizing unpopped grains unti

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7 15 Pts A Hot Air Popcorn Popper Operates By Blowing Air Though The Popping Chamber Fluidizing Unpopped Grains Unti 1 (22.66 KiB) Viewed 50 times

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7. (15 pts) A hot air popcorn popper operates by blowing air though the popping chamber, fluidizing unpopped grains until they pop, then carrying the popped corn up through a duct and out of the popper, leaving the unpopped grains behind, Calculate the density of the unpopped grains if the air velocity required for their fluidization is 1 m/s. Assume the diameter of the popper chamber is 8 cm, the unpopped grains have an equivalent spherical diameter of 5 mm, and that the grains can be approximated as spheres.
Table 1. Sporláty of Particles Partielo Shape Sphericity 34 1.00 Sphere Cube 0.81 ds cylindor had 0.87 hd 0.70 1 100 0,58 0.70 TABLE 7.2 Void fractions for dumped packings D/D. e for spheres NO 0.34 0.1 0.38 0.2 0.3 046 0.4 0.50 05 0.55 Discs hd/3 hd/6 - 1/10 042 e for eylinders 0.34 0.35 0.39 0.45 0.53 0.60 0.60 0.47 os Nigh as 0.86 old beach sand Young rivor sand Crushed solids Granular particles Whent low 3 0,53 0.5 0.1 0.7 0.8 0.05 TABLE 7.1 Sphericity of miscellaneous materialul Material Sphericity Material Sphericity Sphers, who Ottawa sand 0.95 ylinders (LED) 1.0 Rounded and 0.83 Raschig rings ( LD) Cooldust 0.23 L-DD-0.5D Flintsand 0.65 LEDD, -0.750 0331 Crushed glass 0,65 Bed saddles 03 Mice flakes 0.28 try pension, from J. H. Perry (ed.), Chelcal Bhar Handbook 6th ed. p. 5-54, McGraw-Hill Hook Company, New York, 1984 Calculated volio 0581