- thermocouple is used emperature of air flowing through a duct. The to measure the eat transfer coefficient between the air and the nermocouple is proportional to v0.8, where v is ne average velocity of the air within the duct. ssume that the heat transfer by radiation from he duct walls to the thermocouple bead is linearly roportional to the temperature difference etween them. For v = 5 m/s, the thermocouple eads 50 °C while when the air flows at 10 m/s, it eads 40 "C. (a) If the actual temperature of the air s 25 °C, estimate the wall emperature. (b) What temperature will the hermocouple indicate when the gas velocity is 20 7/s.
- thermocouple is used emperature of air flowing through a duct. The to measure the eat transfer coefficient between the air and the nermocouple is proportional to v0.8, where v is ne average velocity of the air within the duct. ssume that the heat transfer by radiation from he duct walls to the thermocouple bead is linearly roportional to the temperature difference etween them. For v = 5 m/s, the thermocouple eads 50 °C while when the air flows at 10 m/s, it eads 40 "C. (a) If the actual temperature of the air s 25 °C, estimate the wall emperature. (b) What temperature will the hermocouple indicate when the gas velocity is 20 7/s.
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:A thermocouple is used to
measure the
temperature of air flowing through a duct. The
heat transfer coefficient between the air and the
thermocouple is proportional to v0.8, where v is
the average velocity of the air within the duct.
Assume that the heat transfer by radiation from
the duct walls to the thermocouple bead is linearly
proportional to
between them. For v = 5 m/s, the thermocouple
the temperature difference
%3D
reads 50 °C while when the air flows at 10 m/s, it
reads 40 "C. (a) If the actual temperature of the air
is 25 °C, estimate the wall
temperature. (b) What temperature will the
thermocouple indicate when the gas velocity is 20
m/s.
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