A flat cereal has a thickness of 2L =1.2mm. The specific mass, specific heat and thermal conductivity of the cereal are, respectively, 700 Kg/m³ and 0.34 W/m*K. The product must be baked, raising its temperature from 20°C to 220°C , in a convective oven with a 3-meter-long conveyor belt. The convection heat transfer coefficient is 55 W/K*m? and its temperature is 300 °C. Determine: a) Is the global capacitance hypothesis valid? b) What speed is needed for the treadmill? c) An engineer suggests that if the grain thickness is reduced to 2L=1mm, the belt speed can be increased, resulting in higher productivity. What would the belt speed be for this new grain thickness?

A flat cereal has a thickness of 2L =1.2mm. The specific mass, specific heat and thermal conductivity of the cereal are, respectively, 700 Kg/m³ and 0.34 W/mK. The product must be baked, raising its temperature from 20°C to 220°C , in a convective oven with a 3-meter-long conveyor belt. The convection heat transfer coefficient is 55 W/Km? and its temperature is 300 °C. Determine: a) Is the global capacitance hypothesis valid? b) What speed is needed for the treadmill? c) An engineer suggests that if the grain thickness is reduced to 2L=1mm, the belt speed can be increased, resulting in higher productivity. What would the belt speed be for this new grain thickness?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A flat cereal has a thickness of 2L =1.2mm . The specific mass, specific heat and
thermal conductivity of the cereal are, respectively, 700 Kg/m³ and 0.34 W/m*K. The
product must be baked, raising its temperature from 20°C to 220°C , in a convective
oven with a 3-meter-long conveyor belt. The convection heat transfer coefficient is 55
W/K*m? and its temperature is 300 °C. Determine:
a) Is the global capacitance hypothesis valid?
b) What speed is needed for the treadmill?
c) An engineer suggests that if the grain thickness is reduced to 2L=1mm, the belt speed
can be increased, resulting in higher productivity. What would the belt speed be for this
new grain thickness?

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