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A flaked cereal is of thickness 2L 12 mm The density specific heat and thermal conductivity of the flake are 700 kgm3 cp 2400 Jkg

A flaked cereal is of thickness 2L 1.2 mm. The density, specific heat, and thermal conductivity of the flake are 700 kg/m3, cp = 2400 J/kg ∙ K, and k = 0.34 W/m∙ K, respectively. The product is to be baked by increasing its temperature from Ti = 20°C to Tf = 220°C in a convection oven, through which the product is carried on a conveyor. If the oven is Lo = 3 m long and the convection heat transfer coefficient at the product surface and oven air temperature are h = 55 W/m2 ∙ K and T 300°C, respectively, determine the required conveyor velocity, V. An engineer suggests that if the flake thickness is reduced to 2L 1.0 mm the conveyor velocity can be increased, resulting in higher productivity. Determine the required conveyor velocity for the thinner flake.

 

 

 
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Jun 27 2020 View more View Less

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