This document provides an overview of an engineering thermodynamics presentation by Mr. R.L. Sankarlal. It outlines 5 units that will be covered: 1) basic concepts and the first law of thermodynamics, 2) the second law and entropy, 3) steam generation and properties, 4) thermodynamic relations, and 5) psychrometry and gas mixtures. Key concepts from each unit are listed, including closed and open systems, the first and second laws, entropy, steam properties, the Rankine cycle, real gases, psychrometric processes, and gas mixtures. Diagrams are provided on the Carnot cycle, steam formation, Mollier diagrams, and the psychrometric chart. The presentation aims

1. Engineering Thermodynamics
An Overview
Date: 08 June 2021
A Presentation by:
Mr. R.L. SANKARLAL,
Asst. Professor (Gr-II) /Mech.,
R.M.K. Engineering College

2. Unit – I Basic concepts & I law of TD
1.Thermodynamic Systems
2.Properties – Intensive & Extensive, Perfect Gas Equation
3.Heat (Q) Vs Work (W)
4.Property, State, Process & Cycle in Property Diagram
5.Processes – Non-flow Processes, Flow Processes
6. First Law of Thermodynamics for Cyclic Process, PMM-I.
7.First Law of Thermodynamics for Non-Process & Flow
Processes (SFEE)

3. 1
1-2-1 A cycle
2
Closed System
( Non-flow Processes)

4. e
Ce
i Shaft
Ci dW
ze
zi
Steady flow device
Open Systems
(Flow Processes)
( First law of TD as SFEE)

5. Unit – II Second Law & Entropy
1.Source, Sink
2.Second Law as per Kelvin-Plank (Engine), Clausius (Refrigerator)
3.Heat (Q), Work (W), Efficiency, COP.
4.Ideal Engine Vs Actual Engine. (Carnot’s Statements)
5.Relationship between Efficiency of Engine, COP of Refrigerator & HP.
6.Entropy Definition
7.Irreversibility & Entropy.
8. Principle of Increase of Entropy
9.Availability & Unavailability

6. Cold Reservoir
Hot Reservoir
Engine, Refrigerator & Heat Pump

7. Unit – III Steam Generation & Properties
1.Sensible Heat Vs Latent Heat
2.Steam Formation, Types of Steam
3.Dryness Fraction, Wetness Fraction
4.Properties of Steam in Steam Tables, h-s Diagram(Mollier Diagram)
5.Rankine Cycle, Adiabatic/Isentropic Expansion in Turbine.
6.Methods to improve efficiency of Rankne Cycle
7.Reheat Cycle, Regenerative Cycle.
8. Reheaters & Staging the expansion & Steam tapping
9.Representation of the above in Mollier Diagram

8. Unit – IV Thermodynamic Relations
1.Ideal vs Real Gases, Vander Waal’s Equation
2.Gibbs Function, Helmotz Function, Maxwells
Relations, TdS Equations
3.Compressibility Factor(z), Compressibility Chart
4.Clausius Clayperon Equation
5.Joule Thompson Experiment

9. Unit – V Psychrometry & Gas MIxtures
General Definitions:
• Dry Air
• Moist Air
• Humidity
• Saturated Air
• Dew / Mist /Frost / Fog
Phychrometric Properties:
Dry Bulb Temperature - DBT
Wet Bulb temperature – WBT
Wet Bulb Depression - WBD
Dew Point Temperature – DPT
Absolute Humidity / Specific Humidity / Humidity Ratio
Relative Humidity
Specific Enthalpy
Specific Volume
1. Mixing of air streams
2. Sensible heating
3. Sensible cooling
4. Cooling and dehumidification
5. Cooling and humidification
(Evaporative Cooling)
6. Heating and dehumidification
7. Heating and humidification.
Psychrometric
Processes
Gas Mixtures
1. Daltons Law of Partial Pressure
2. Amagat’s Law of Partial Volume.
3. Mass Fraction & Mole Fractions

10. Psychrometric Chart

13. Questions, Queries
& Discussions