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the duct walls to the thermocouple bead is linearly proportional to the temperature difference between them. For v = 5 m/s, the thermocouple 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.

the duct walls to the thermocouple bead is linearly proportional to the temperature difference between them. For v = 5 m/s, the thermocouple 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.

Elements Of Electromagnetics
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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Q. 1: 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 vo.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 the temperature difference between them. For v = 5 m/s, the thermocouple 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.
Transcribed Image Text:Q. 1: 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 vo.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 the temperature difference between them. For v = 5 m/s, the thermocouple 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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