A. The temperature of a gas stream is to be measured by a thermocouple whose junction can be approximated as a 1-mm- diameter sphere, as shown in the figure. The properties of the junction are k- 35 W/m °C, p38500 kg/m', and Cp= 320 J/kg °C, and the convection heat transfer coefficient between the junction and the gas is h=210 W/m? . °C. Determine how long it will take for the thermocouple to read 99 percent of the initial temperature difference.
A. The temperature of a gas stream is to be measured by a thermocouple whose junction can be approximated as a 1-mm- diameter sphere, as shown in the figure. The properties of the junction are k- 35 W/m °C, p38500 kg/m', and Cp= 320 J/kg °C, and the convection heat transfer coefficient between the junction and the gas is h=210 W/m? . °C. Determine how long it will take for the thermocouple to read 99 percent of the initial temperature difference.
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:24 A. The temperature of a gas stream is to be measured by a
Thermocouple
wire
thermocouple whose junction can be approximated as a 1-mm-
diameter sphere, as shown in the figure. The properties of the
junction are k-35 W/m °C, p38500 kg/m', and Cp= 320 J/kg
°C, and the convection heat transfer coefficient between the
junction and the gas is h= 210 W/m? . °C. Determine how long
it will take for the thermocouple to read 99 percent of the initial
temperature difference.
Gas
Junction
D-1 mm
TO)
B. What are Ti, Tj, and Tr in the wall shown in Figure below:
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