Lec02 - ME 200: Thermodynamics I Lecture 2: Basic...

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ME 200: Thermodynamics I Lecture 2: Basic Thermodynamic Concepts 8/20/2009 1 Prof. Lucht's Lecture Notes Modified Professor Hukam Mongia Office Hours: MWF 2:30 to 3:30 pm in ME 83 (Other times email for appointment) Email: hmongia@purdue.edu Phone: 765-494-5640 Course Website: https://engineering.purdue.edu/ME200 Course Secretaries: Diana Akers (ME 84) and Marilyn Morrison (ME 100)
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Last Lecture What is thermodynamics? Study of energy/Work transformations Relationships among physical quantities of different substances affected by such transformations A tool to make best use of resources consistent with 1 st and 2 nd laws of thermodynamics (“Sustainability”) Two approaches Classical thermodynamics: macroscopic (considers large scale behavior) 1 st stage of engineering analysis Statistical thermodynamics: microscopic (considers molecular scale behavior)- 2 nd level of analysis In ME 200, we will focus on understanding large scale behavior, statistical viewpoints in a supporting role Dimensions and units 8/20/2009 2 Prof. Lucht's Lecture Notes Modified
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This Lecture Discuss some terms and concepts commonly used in thermodynamic analysis System Property State Equilibrium Process Cycle Energy 8/20/2009 3 Prof. Lucht's Lecture Notes Modified
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System and Surroundings What is a thermodynamic system? Any three-dimensional region of space bounded by one or more arbitrary geometric surfaces What is meant by the term surroundings? The region of space outside the arbitrary boundaries System boundary may be real or it could be imaginary The system may be stationary or moving 8/20/2009 4 Prof. Lucht's Lecture Notes Modified
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System and Surroundings Identification of system and its surroundings is the critical first step to begin thermodynamic analysis this approach is in contrast to looking through the book to find the equation that you can plug numbers into in order to solve the homework problem (a very wrong perspective for a person to become above-average engineer) A good control volume diagram indicating system and surroundings (what, why, where?) is crucial in a systematic approach to thermodynamic analysis (for any engineering problem?) 8/20/2009 5 Prof. Lucht's Lecture Notes Modified
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Lec02 - ME 200: Thermodynamics I Lecture 2: Basic...

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