lecture7 - Prof.Naik 2011 ME 200: Thermodynamics I Lecture...

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1 Prof.Naik © 2011 ME 200: Thermodynamics I Lecture 7: Energy Balance – Closed System Last Lecture Concept of Total Energy » Macroscopic Forms: Kinetic Energy and Potential Energy Prof.Naik © 2011 » Microscopic Forms: Internal Energy » Changes in energy are relevant in thermodynamics » Change in total energy Modes of Heat Transfe E KE PE U    Modes of Heat Transfer » Conduction » Convection » Radiation
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2 This Lecture Energy Balance – Closed System Prof.Naik © 2011 Energy Balance – Closed System Conservation of Energy states that energy can neither be created nor destroyed Prof.Naik © 2011 Based on experimental evidence, we can write: » Q = Net heat transfer across system boundary » W = Net work interaction across system boundary » E = Change in total energy within the system In the above equation: » Q and W are path functions » E is a point function
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3 Energy Balance – Closed System (contd.) Sign Convention: » Q > 0 heat transfer to the system Prof.Naik © 2011
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This note was uploaded on 09/09/2011 for the course ME 200 taught by Professor Gal during the Spring '08 term at Purdue University-West Lafayette.

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lecture7 - Prof.Naik 2011 ME 200: Thermodynamics I Lecture...

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