lactures - ME 3433 Heat Transfer Prof. Srinath Ekkad...

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05/12/09 Lecture 1 1 ME 3433 Heat Transfer Prof. Srinath Ekkad sekkad@vt.edu 101 Randolph Hall 231-7192
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05/12/09 Lecture 1 2 Introduction What is the definition for Heat Transfer? - Transfer of thermal energy due to temperature difference - Examples??? - Everywhere - Part of daily life!! Why is important to study heat transfer? - Mechanical Engineer Perspective! - Extends the scope of thermodynamics to include the mechanisms and rates of heat transfer - Thermodynamics deals with heat transfer in a generalized sense not in precise terms
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05/12/09 Lecture 1 3 W Q E tot st - = Conservation Equations Mass conservation Momentum conservation Energy conservation First law of thermodynamics Applied to control volume, a region in space bounded by a control surface “The increase in the amount of energy stored in a control volume must equal the amount of energy that enters the control volume, minus the amount of energy that leaves the control volume”
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05/12/09 Lecture 1 4 Conservation of Energy At any instant of time, t: Net rate of energy crossing surface due to conduction, convection, and radiation at time t (W or J/s) Rate of heat generation in the control volume at time t (W)
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This note was uploaded on 03/30/2008 for the course ME 3304 taught by Professor Stern during the Spring '08 term at Virginia Tech.

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lactures - ME 3433 Heat Transfer Prof. Srinath Ekkad...

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