5-159 Design a fire-resistant safety box whose outer dimen- sions are 0.5 m X 0.5 m × 0.5 m that will protect its combusti- ble contents from fire which may last up to 2 h. Assume the box will be exposed to an environment at an average temperature of 700°C with a combined heat transfer coefficient of 70 W/m².K and the temperature inside the box must be below 150°C at the end of 2 h. The cavity of the box must be as large as possible while meeting the design constraints, and the insulation mate- rial selected must withstand the high temperatures to which it will be exposed. Cost, durability, and strength are also impor- tant considerations in the selection of insulation materials.
5-159 Design a fire-resistant safety box whose outer dimen- sions are 0.5 m X 0.5 m × 0.5 m that will protect its combusti- ble contents from fire which may last up to 2 h. Assume the box will be exposed to an environment at an average temperature of 700°C with a combined heat transfer coefficient of 70 W/m².K and the temperature inside the box must be below 150°C at the end of 2 h. The cavity of the box must be as large as possible while meeting the design constraints, and the insulation mate- rial selected must withstand the high temperatures to which it will be exposed. Cost, durability, and strength are also impor- tant considerations in the selection of insulation materials.
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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Transcribed Image Text:5-159 Design a fire-resistant safety box whose outer dimen-
sions are 0.5 m X 0.5 m × 0.5 m that will protect its combusti-
ble contents from fire which may last up to 2 h. Assume the box
will be exposed to an environment at an average temperature of
700°C with a combined heat transfer coefficient of 70 W/m².K
and the temperature inside the box must be below 150°C at the
end of 2 h. The cavity of the box must be as large as possible
while meeting the design constraints, and the insulation mate-
rial selected must withstand the high temperatures to which it
will be exposed. Cost, durability, and strength are also impor-
tant considerations in the selection of insulation materials.
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