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lecture01 - LECTURE 1 THERMODYNAMICS An Engineering...

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1 LECTURE 1 THERMODYNAMICS An Engineering Approach Introduction – Concepts and Definitions Energy, Energy Transfer, and General Energy Analysis Dr. MinJun Kim Department of Mechanical Engineering & Mechanics Drexel University Syllabus Grading Homework & Recitation 20% 2 Times, 1.5 Hour Exams 30% 2 Hours Final Exam 25% Project Report 20% Class Attendance 5% Thermodynamics Design Project Report 1. Group Studies supervised by instructor & T.A. 2. One of the primary requirement through design ideas, procedures, and implementations. 3. Evaluate the merit of the work and approve the design, manufacturing unit, and other professionals.
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2 USA Energy Consumption 40 50 60 70 80 90 100 1960 1970 1980 1990 2000 Year BTU x E15 Overview Energy Trends What do we want to know? 1. Efficiency / Performance Evaluation 2. Power (Energy) in and out 3. Properties of working fluid 4. Limitations on performance 5. Chemical and phase equilibrium 6. Thermodynamic processes and devices 7. Power and refrigeration cycles 8. Gas mixtures and air-water vapor mixtures 9. Chemical reactions (combustion) TDEC 201 Energy MEM310 Thermodynamic Analysis I
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3 Hi – Lo Energy Hiroshima Bomb of 1945 Typical Caribbean Hurricane Daily Adult Food Intake Global Net Photosyntheis Latent Heat of a Thunderstorm Striking a Typewriter Key 84 × 10 12 J 38 × 10 18 J 10 × 10 6 J 2000 × 10 18 J 5 × 10 15 J 20 × 10 -2 J 1 2 3 4 5 6 What is thermodynamics? Typical Thermodynamic System http://en.wikipedia.org/wiki/Thermodynamics THERMO + DYNAMICS Therme Motion, Forces (HEAT) (WORK) Transfer Describes processes that involve changes in temperature, transformation of energy, relations between heat and work. It is a science, and more importantly an engineering tool, that is necessary for describing the performance of propulsion systems, power generations, combustion, and so forth. For example, Combustion (Heat) ! Shaft rotation (Work) Jet propulsion (Heat) ! Thrust (Work) Steam power plant (Heat) ! Electricity (Work)
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4 Review Thermodynamics is the branch of physics concerned with the conversion of different forms of energy. The conservation of energy principle states that energy can be neither created nor destroyed. The 1 st law of thermodynamics is a statement of the conservation of energy principle and that energy is a thermodynamic property. The 2 nd law of thermodynamics states that energy has quality as well as quantity. Classical thermodynamics is the macroscopic study of energy storage and exchange. Statistical thermodynamics is the microscopic study of energy storage and exchange. Dimensions & SI Units Dimension SI Unit Abbrev. Length meter m Mass kilogram kg Time second s Electric current ampere A Temperature kelvin K Luminous intensity candela cd # of atoms or molecules mole mol Dimension SI Unit Abbrev. Force newton N Energy joule J Speed meter/second m/s
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5 Standard Prefixes in SI Units Multiple Prefix Symbol 10 -12 pico p 10 -9 nano n 10 -6 micro !
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This note was uploaded on 02/28/2011 for the course MEM 310 taught by Professor Miller during the Winter '08 term at Drexel.

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lecture01 - LECTURE 1 THERMODYNAMICS An Engineering...

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