Fundamentals of Engineering Thermodynamics 8th Edition

Published by Wiley
ISBN 10: 1118412931
ISBN 13: 978-1-11841-293-0

Chapter 2 - Exercises: Things Engineers Think About: 5

Answer

Conduction- The coal gets heated by the hot metal bottom of the grill. The heat is transferred from metal to charcoal by direct contact. This is conduction. Convection- The heated coal warms the air around it and this warm air gets in contact with raw food. Thus air is a medium of heat exchange, So this is an example of convection. Radiation- We can feel the heat of the heated charcoal from a distance as well. This is because of the radiations in the form of heat and light emitted by the heated charcoal.

Work Step by Step

Conduction- The coal gets heated by the hot metal bottom of the grill. The heat is transferred from metal to charcoal by direct contact. This is conduction. Convection- The heated coal warms the air around it and this warm air gets in contact with raw food. Thus air is a medium of heat exchange, So this is an example of convection. Radiation- We can feel the heat of the heated charcoal from a distance as well. This is because of the radiations in the form of heat and light emitted by the heated charcoal.
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