dr. emad m. saad - fayoum · 3 lecture (1) – thermodynamics – 2nd year course syllabus text...

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Faculty of Engineering

Mechanical Engineering Dept.

Dr. Emad M. Saad Mechanical Engineering Dept.

Faculty of Engineering

Fayoum University

Entropy

Lecture (1)

on

By

2015 - 2016

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Lecture (1) – Thermodynamics – 2nd year

Course Syllabus

Text Books: Lectures notes

References: Y. A. Çengel and M. Boles, Thermodynamics: An Engineering

Approach, 5th ed., McGraw Hill, 2007.

Evaluation: 1. Homework, attendance and assignments; equivalent 20%.

2. Mid exam; equivalent 20%.

3. Final exam; equivalent 60%.

Professor: Facebook: DrEmad Elasid

Website: http://www.fayoum.edu.eg/emad

Email: emadsaad@fayoum.edu.eg

Office Hours: Monday: 9:00 - 14:30

or by Appointment

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Course Syllabus

1. Entropy: definition, change in entropy in reversible process, entropy and irreversibility,

principle of increase in entropy, relation of entropy with the properties.

2. Availability and irreversibility: entropy balance, available energy, reversible work, availability

analysis, exergy destruction, second law efficiency.

3. The pure substance: phase equilibrium, p-v-T diagrams, property tables and charts.

4. Gas and power cycle: Ideal gas cycles: Otto, Diesel, Dual, Brayton

5. Vapor cycles: Rankine cycle – modification to Rankine cycle.

6. Refrigeration cycles: reversed Carnot cycle, vapor compression cycles, vapor absorption cycles.

7. Gas mixtures: Mixture of ideal gas and vapor, Dalton law of additive pressure, Amagat’s law

of additive volumes.

8. Thermodynamics of reactant systems: chemical equilibrium, combustion, enthalpy of

formation, enthalpy of reaction, adiabatic flame temperature.

Lecture (1) – Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

Entropy is a measure of the amount of

disorder in a system. The more disorder, the

higher the entropy of the system.

Entropy in thermodynamics

Entropy is a measure of the number of specific ways in which

a thermodynamic system may be arranged

Entropy concept in Life

Entropy is a measure of the theoretical amount of energy

that can not convert to mechanical work in thermodynamic

system

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Lecture (1) –Thermodynamics – 2nd year

Entropy is a function of a quantity of heat which shows the possibility of conversion of that heat into work. The increase in entropy is small when heat is added at a high temperature and is greater when heat addition is made at a lower temperature. Thus for maximum entropy, there is minimum availability for conversion into work and for minimum entropy there is maximum availability for conversion into work.

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Lecture (1) –Thermodynamics – 2nd year

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An important inequality that has major consequences in

thermodynamics is the Clausius inequality and is expressed as:

Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Lecture (1) –Thermodynamics – 2nd year

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Nozzle Compressor & pump

Turbine

Lecture (1) –Thermodynamics – 2nd year

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