2. A heater is a thin vertical panel 1.0m long and 0.7m high and is used in a warehouse to keep workers warm. The heater has air circulating on each side. Assume the maximum temperature of the panel is 60°C (already above the board line that is safe for human hands to touch briefly without getting hurt). Assume the room air temperature is 18°C but the warehouse wall temperature is 5°C. Model the surface with an emittance of 0.9 and Vair = 1.57x10-5 m²/s. a. Determine the maximum power rating for the heater. b. Now if you run the heat by standing on its side (it will be 1.0 m high and 0.7 m long), determine the surface temperature. c. Compare case a and b and explain any differences you see.

2. A heater is a thin vertical panel 1.0m long and 0.7m high and is used in a warehouse to keep workers warm. The heater has air circulating on each side. Assume the maximum temperature of the panel is 60°C (already above the board line that is safe for human hands to touch briefly without getting hurt). Assume the room air temperature is 18°C but the warehouse wall temperature is 5°C. Model the surface with an emittance of 0.9 and Vair = 1.57x10-5 m²/s. a. Determine the maximum power rating for the heater. b. Now if you run the heat by standing on its side (it will be 1.0 m high and 0.7 m long), determine the surface temperature. c. Compare case a and b and explain any differences you see.

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

2. A heater is a thin vertical panel 1.0m long and 0.7m high and is used in a warehouse to keep workers warm.
The heater has air circulating on each side. Assume the maximum temperature of the panel is 60°C
(already above the board line that is safe for human hands to touch briefly without getting hurt). Assume
the room air temperature is 18°C but the warehouse wall temperature is 5°C. Model the surface with an
emittance of 0.9 and Vair = 1.57x105 m²/s.
a. Determine the maximum power rating for the heater.
b.
Now if you run the heat by standing on its side (it will be 1.0 m high and 0.7 m long), determine
the surface temperature.
c.
Compare case a and b and explain any differences you see.

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