ME2121 – Engineering Thermodynamics

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Reversible & Irreversible processes Causes: friction, unconstrained expansion, mixing, heat transfer under finite temperature differences. Internally reversible- no irreversibilities within system Externally reversible- no irreversibilities outside system boundaries Totally reversible or simply reversible, if both have no irreversibilities © Copyright 2005 Prof. Arun S. Mujumdar. <strong>ME2121</strong> - Entropy I - Introduction (ASM) 16
Clausius Inequality (Cont’d) To demonstrate the validity of the Clausius inequality consider a system connected to a thermal energy reservoir at a constant absolute temperature of T R through a reversible cyclic device (See Fig 6-1). The cyclic device receives heat δQ R from the reservoir and supplies heat δQ to the system whose absolute temperature at that part of the boundary is T (a variable) while producing work δW rev . © Copyright 2005 Prof. Arun S. Mujumdar. <strong>ME2121</strong> - Entropy I - Introduction (ASM) 17
Page 1 and 2: ME2121 - Engineering Thermodynamics
Page 3 and 4: Review Chapter 5-2 nd Law Concepts/
Page 5 and 6: Direction of Energy Conversion •
Page 7 and 8: Entropy and Disorder • The Entrop
Page 9 and 10: Entropy of Crystalline Substance Th
Page 11 and 12: INTRODUCTION (Cont’d) We start wi
Page 13 and 14: Clausius Inequality (Cont’d) Clau
Page 15: Brief Review: Reversibilities etc R
Page 19 and 20: Clausius Inequality (Cont’d) The
Page 21 and 22: Clausius Inequality (Cont’d) Q T
Page 23 and 24: Clausius Inequality (Cont’d) It t
Page 25 and 26: Clausius Inequality (Cont’d) Ther
Page 27 and 28: Entropy (Cont’d) The term entropy
Page 29 and 30: Entropy (Cont’d) Note that entrop
Page 31 and 32: Internally Reversible Isothermal He
Page 33 and 34: Internally Reversible Isothermal He
Page 35: Closure Study chapter 6 of textbook

ME2121 – Engineering Thermodynamics

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