A temperature sensor imbedded in the tip of a small tube having a diffuse, gray surface with

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A temperature sensor imbedded in the tip of a small tube having a diffuse, gray surface with an emissivity of 0.8 is centrally positioned within a large air-conditioned 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 ɛ = 0.2, 0.5, and 0.8.  

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Fundamentals of Heat and Mass Transfer

ISBN: 978-0471457282

6th Edition

Authors: Incropera, Dewitt, Bergman, Lavine

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