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heat-transfer-notes1 - INTRODUCTION TO HEAT TRANSFER Any...

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INTRODUCTION TO HEAT TRANSFER Any transfer process may be defined as: Tendency Toward Equilibrium HEAT: is a form of energy that is transferred from one system to another by virtue of temperature difference in the direction of decreasing temp. HEAT TRANSER: The science that deals with determination of the rates of heat transfer. Why take this subject? Is thermodynamics sufficient? Discussion: 1
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1. Introduction to Heat Transfer Any transfer process may be defined as: Tendency toward equilibrium In solid body with a non-uniform temperature distribution energy is transferred such that a uniform T is established Heat is the energy transferred by virtue of a temperature difference or gradient in the direction of decreasing temperature. Thermodynamics : makes a constant reference to heat transfer between systems. 1 st law: dU = δ Q - δ W I nternal Energy heat work Pd In equilibrium thermodynamic δ Q is only evaluated across infinitesimal dT.
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