EES Metal plates (k = 180 W/m-K, p= 2800 kg/m², |and c, = 880 J/kg-K) with a length of 1 m and a thickness of 2 cm exiting an oven are then conveyed through a 10-m-long cooling chamber at a speed of 5 mm/s. The plates enter the cooling chamber at an initial temperature of 155°C. In the cooling chamber, the plates are cooled with 10°C air blowing in parallel over them. To prevent any incident of ther- mal burn, it is necessary to design the cooling process such that the plates exit the cooling chamber at a relatively safe 7-50 PtD temperature. Determine the air velocity such that the temperature of the plates exiting the cooling chamber is 45°c or less. Assume combined laminar and turbulent flow (verify this assumption). Hint: Use the lumped system analysis to determine the required cooling time (verify application of this method to this problem). Cooling chamber 5 mm/s 2 cm Metal plate Blowing air, 10°C
EES Metal plates (k = 180 W/m-K, p= 2800 kg/m², |and c, = 880 J/kg-K) with a length of 1 m and a thickness of 2 cm exiting an oven are then conveyed through a 10-m-long cooling chamber at a speed of 5 mm/s. The plates enter the cooling chamber at an initial temperature of 155°C. In the cooling chamber, the plates are cooled with 10°C air blowing in parallel over them. To prevent any incident of ther- mal burn, it is necessary to design the cooling process such that the plates exit the cooling chamber at a relatively safe 7-50 PtD temperature. Determine the air velocity such that the temperature of the plates exiting the cooling chamber is 45°c or less. Assume combined laminar and turbulent flow (verify this assumption). Hint: Use the lumped system analysis to determine the required cooling time (verify application of this method to this problem). Cooling chamber 5 mm/s 2 cm Metal plate Blowing air, 10°C
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
![Metal plates (k = 180 W/m-K, p= 2800 kg/m',
and c, = 880 J/kg-K) with a length of 1 m and
a thickness of 2 cm exiting an oven are then conveyed through
a 10-m-long cooling chamber at a speed of 5 mm/s. The plates
enter the cooling chamber at an initial temperature of 155°C.
In the cooling chamber, the plates are cooled with 10°C air
blowing in parallel over them. To prevent any incident of ther-
mal burn, it is necessary to design the cooling process such
that the plates exit the cooling chamber at a relatively safe
7-50
%3D
PtD
EES
temperature. Determine the air velocity such that the
temperature of the plates exiting the cooling chamber is 45°C
or less. Assume combined laminar and turbulent flow (verify
this assumption). Hint: Use the lumped system analysis to
determine the required cooling time (verify application of this
method to this problem).
Cooling chamber
5 mm/s
2 cm
Metal plate
Blowing air, 10°C
of](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5b2902b7-5c33-45e9-8300-6acc53566b63%2F594979d2-51a2-4558-b84d-cc3220d89979%2Fty5c408_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Metal plates (k = 180 W/m-K, p= 2800 kg/m',
and c, = 880 J/kg-K) with a length of 1 m and
a thickness of 2 cm exiting an oven are then conveyed through
a 10-m-long cooling chamber at a speed of 5 mm/s. The plates
enter the cooling chamber at an initial temperature of 155°C.
In the cooling chamber, the plates are cooled with 10°C air
blowing in parallel over them. To prevent any incident of ther-
mal burn, it is necessary to design the cooling process such
that the plates exit the cooling chamber at a relatively safe
7-50
%3D
PtD
EES
temperature. Determine the air velocity such that the
temperature of the plates exiting the cooling chamber is 45°C
or less. Assume combined laminar and turbulent flow (verify
this assumption). Hint: Use the lumped system analysis to
determine the required cooling time (verify application of this
method to this problem).
Cooling chamber
5 mm/s
2 cm
Metal plate
Blowing air, 10°C
of
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