About Book:

We are pleased to bring out our fully Fourteenth edition of “Engineering Thermodynamics’ ‘ for Engineering and Technology studies. This book is written to serve the needs of undergraduate students embarking on an introductory course in Engineering Thermodynamics. This book is designed to meet the requirements of revised syllabus prescribed by the Anna University Chennai, Trichy, Coimbatore & Tirunelvell for 3 Semester Mechanical and Automobile Engineering students of its affiliated colleges.

This book consists of 5 units.

• Unit 1 deals with basic concepts of thermodynamics such as concept of continuum, microscopic and macroscopic approaches, path and point functions, intensive and extensive properties, total and specific quantities, system and their types, thermodynamic equilibrium state, path and process, quasi-static, reversible and irreversible processes, heat and work transfer, displacement work and other modes of work, P-V diagram, Zeroth law of thermodynamics, concept of temperature and thermal equilibrium, relationship between temperature scales, and new temperature scales. This unit also deals with first law of thermodynamics applied to closed & open systems and steady flow process
• Unit 2 has wide coverage of second law of thermodynamics in which various topics such as heat reservoir, source and sink, heat engine, refrigerator, heat pump, statements of second law and its corollaries, Carnot and reversed Carnot cycles, Clausius inequality, concept of entropy. T-S diagram, Tds equations, entropy change for pure substance, ideal gasses, and different processes, principle of increase in entropy, applications of II law, high and low grade energy, available and unavailable energy of a source and finite body, energy and irreversibility, expressions for the energy of a closed system and open systems, energy balance and entropy generation, irreversibility, I and II law efficiency are discussed.

• . Unit 3 deals with properties of pure substances, phase rule, p-V. p-T, T-V, T-s h-s diagrams, PVT surfaces, determination of dryness fraction,application of I and II law for pure substances, ideal and actual Rankine cycles, cycle improvement methods such as reheat and regenerative cycles, economiser, preheater, binary and combined cycles.

• . Unit 4 dealt with ideal and real gasses under which various topics such as properties of ideal gas, equations of state for ideal and real gasses-reduced properties, compressibility factor and generalized compressibility chart are discussed. This unit also deals with Maxwell relations, Tds Equations, difference and ratio of heat capacities, energy equation, Joule-Thomson coefficient, Clausius Clapeyron equation, phase change processes.

• . Unit 5 elaborately discusses various gas mixtures and psychrometry topics such as mole and mass fraction, Dalton’s and Amagat’s laws, properties of gas mixture such as molar mass, gas constant, density, change in internal energy, enthalpy, entropy and Gibbs function, psychrometric properties and its calculations for air vapor mixtures by using chart and expressions, psychrometric process such as adiabatic saturation, sensible heating and cooling, humidification, dehumidification, evaporative cooling and adiabatic mixing.

Important solved University questions, and two mark questions and answers have been added at the tail end of each unit which will enable the students to score high marks in the University examinations. Recent Solved Anna University Question Papers have been added at the end of this book.

With these features, we sincerely hope that this book would serve as a valuable text for the students.

hough efforts have been taken aiming at a ‘zero flaw’ content, we do recognize that

stakes may have inadvertently crept in. We welcome constructive criticisms on any

cific topics of this book.

our sincere thanks to Mrs. Nirmala Durai, Proprietor of “Lakshmi Publications” the Publishing Adviser/Managing Director Mr. A. DURAI, B.E. for their elvement to make this publication successful