ef152-lec-6-2 - Module 6, Lecture 2 Looked at Otto and...

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EF 152 Spring, 2009 Lecture 6-2 1 Module 6, Lecture 2 ± Looked at Otto and Diesel cycles last lecture ± 2 nd law – no engine can have ______ efficiency ± How efficient can a heat engine be? ± French engineer Sadi Carnot answered question in 1824 ± Hypothetical, idealized engine – does not actually exist Which is not a type of heat engine: A. Otto B. Diesel C. Stirling D. Parang E. Brayton EF 152 Spring, 2009 Lecture 6-2 2 Carnot Cycle ± For maximum heat efficiency, avoid all ____________ processes ± Heat flow through a finite temperature drop is an irreversible process ± Therefore heat transfer (from either T h or T c ) must occur during an _______________ process ± When going between T h and T c , there must be no heat flow, or the change must be _________. ± Can be shown that the heat transfer is proportional to the temperature difference, and the efficiency is h c T T = 1 η h c h c T T Q Q = EF 152 Spring, 2009 Lecture 6-2 3 Carnot Cycle Volume Pressure b Adiabatic
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This note was uploaded on 04/07/2009 for the course EF 152 taught by Professor Ab during the Spring '08 term at University of Tennessee.

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ef152-lec-6-2 - Module 6, Lecture 2 Looked at Otto and...

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