A temperature sensor embedded in the tip of a small tube
Chapter , Problem 12.78(choose chapter or problem)
A temperature sensor embedded in the tip of a small tube having a diffuse, gray surface with an emissivity of 0.8 is centrally positioned within a large airconditioned room whose walls and air temperature are 30 and 20 C, respectively. (a) What temperature will the sensor indicate if the convection coefficient between the sensor tube and the air is 5 W/m2 K? (b) What would be the effect of using a fan to induce airflow over the tube? Plot the sensor temperature as a function of the convection coefficient for 2 h 25 W/m2 K and values of 0.2, 0.5, and 0.8.
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