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Now in its Eighth Edition, Principles of Engineering Thermodynamics continues to set the standard for teaching readers how to be effective problem solvers, emphasizing the authors' signature methodologies that have taught over a half million students worldwide. This new edition provides a student-friendly approach that emphasizes the relevance of thermodynamics principles to some of the most critical issues of today and coming decades, including a wealth of integrated coverage of energy and the environment, biomedical/bioengineering, as well as emerging technologies. Visualization skills are developed and basic principles demonstrated through a complete set of animations that have been interwoven throughout. This edition also introduces co-authors Daisie Boettner and Margaret Bailey, who bring their rich backgrounds of success in teaching and research in thermodynamics to the text.



Table of Contents

1 Getting Started: Introductory Concepts and Definitions 1

1.1 Using Thermodynamics 2

1.2 Defining Systems 2

1.3 Describing Systems and Their Behavior 6

1.4 Measuring Mass, Length, Time, and Force 9

1.5 Specific Volume 11

1.6 Pressure 12

1.7 Temperature 16

1.8 Engineering Design and Analysis 20

1.9 Methodology for Solving Thermodynamics Problems 22

Chapter Summary and Study Guide 24

2 Energy and the First Law of Thermodynamics 30

2.1 Reviewing Mechanical Concepts of Energy 31

2.2 Broadening Our Understanding of Work 35

2.3 Broadening Our Understanding of Energy 46

2.4 Energy Transfer by Heat 47

2.5 Energy Accounting: Energy Balance for Closed Systems 51

2.6 Energy Analysis of Cycles 63

2.7 Energy Storage 67

Chapter Summary and Study Guide 68

3 Evaluating Properties 78

3.1 Getting Started 79

Evaluating Properties: General Considerations 80

3.2 p-??-T Relation 80

3.3 Studying Phase Change 84

3.4 Retrieving Thermodynamic Properties 87

3.5 Evaluating Pressure, Specific Volume, and Temperature 87

3.6 Evaluating Specific Internal Energy and Enthalpy 93

3.7 Evaluating Properties Using Computer Software 96

3.8 Applying the Energy Balance Using Property Tables and Software 97

3.9 Introducing Specifi c Heats c?? and cp 104

3.10 Evaluating Properties of Liquids and Solids 105

3.11 Generalized Compressibility Chart 109

Evaluating Properties Using the Ideal Gas Model 114

3.12 Introducing the Ideal Gas Model 114

3.13 Internal Energy, Enthalpy, and Specific Heats of Ideal Gases 117

3.14 Applying the Energy Balance Using Ideal Gas Tables, Constant Specific Heats, and Software 120

3.15 Polytropic Process Relations 128

Chapter Summary and Study Guide 131

4 Control Volume Analysis Using Energy 142

4.1 Conservation of Mass for a Control Volume 143

4.2 Forms of the Mass Rate Balance 145

4.3 Applications of the Mass Rate Balance 147

4.4 Conservation of Energy for a Control Volume 151

4.5 Analyzing Control Volumes at Steady State 154

4.6 Nozzles and Diffusers 156

4.7 Turbines 159

4.8 Compressors and Pumps 163

4.9 Heat Exchangers 168

4.10 Throttling Devices 173

4.11 System Integration 175

4.12 Transient Analysis 178

Chapter Summary and Study Guide 188

5 The Second Law of Thermodynamics 202

5.1 Introducing the Second Law 203

5.2 Statements of the Second Law 206

5.3 Irreversible and Reversible Processes 209

5.4 Interpreting the Kelvin-Planck Statement 214

5.5 Applying the Second Law to Thermodynamic Cycles 215

5.6 Second Law Aspects of Power Cycles Interacting with Two Reservoirs 216

5.7 Second Law Aspects of Refrigeration and Heat Pump Cycles Interacting with Two Reservoirs 218

5.8 The Kelvin and International Temperature Scales 220

5.9 Maximum Performance Measures for Cycles Operating between Two Reservoirs 223

5.10 Carnot Cycle 229

5.11 Clausius Inequality 231

Chapter Summary and Study Guide 234

6 Using Entropy 243

6.1 Entropy-A System Property 244

6.2 Retrieving Entropy Data 245

6.3 Introducing the T dS Equations 248

6.4 Entropy Change of an Incompressible Substance 250

6.5 Entropy Change of an Ideal Gas 251

6.6 Entropy Change in Internally Reversible Processes of Closed Systems 254

6.7 Entropy Balance for Closed Systems 257

6.8 Directionality of Processes 264

6.9 Entropy Rate Balance for Control Volumes 269

6.10 Rate Balances for Control Volumes at Steady State 270

6.11 Isentropic Processes 277

6.12 Isentropic Efficiencies of Turbines, Nozzles, Compressors, and Pumps 284

6.13 Heat Transfer and Work in Internally Reversible, Steady-State Flow Processes 291

Chapter Summary and Study Guide 295

7 Exergy Analysis 309

7.2 Conceptualizing Exergy 311

7.3 Exergy of a System 312

7.4 Closed System Exergy Balance 318

7.5 Exergy Rate Balance for Control Volumes at Steady State 327

7.6 Exergetic (Second Law) Efficiency 339

7.7 Thermoeconomics 345

Chapter Summary and Study Guide 353

8 Vapor Power Systems 367

Introducing Power Generation 368

Considering Vapor Power Systems 372

8.1 Introducing Vapor Power Plants 372

8.2 The Rankine Cycle 375

8.3 Improving Performance-Superheat, Reheat, and Supercritical 389

8.4 Improving Performance- Regenerative Vapor Power Cycle 395

8.5 Other Vapor Power Cycle Aspects 405

8.6 Case Study: Exergy Accounting of a Vapor Power Plant 410

Chapter Summary and Study Guide 417

9 Gas Power Systems 427

Considering Internal Combustion Engines 428

9.1 Introducing Engine Terminology 428

9.2 Air-Standard Otto Cycle 431

9.3 Air-Standard Diesel Cycle 436

9.4 Air-Standard Dual Cycle 440

Considering Gas Turbine Power Plants 443

9.5 Modeling Gas Turbine Power Plants 443

9.6 Air-Standard Brayton Cycle 445

9.7 Regenerative Gas Turbines 455

9.8 Regenerative Gas Turbines with Reheat and Intercooling 459

9.9 Gas Turbine-Based Combined Cycles 471

9.10 Integrated Gasifi cation Combined-Cycle Power Plants 478

9.11 Gas Turbines for Aircraft Propulsion 480

Considering Compressible Flow through Nozzles and Diffusers 484

9.12 Compressible Flow Preliminaries 485

9.13 Analyzing One-Dimensional Steady Flow in Nozzles and Diffusers 489

9.14 Flow in Nozzles and Diffusers of Ideal Gases with Constant Specific Heats 495

Chapter Summary and Study Guide 503

10 Refrigeration and Heat Pump Systems 516

10.1 Vapor Refrigeration Systems 517

10.2 Analyzing Vapor-Compression Refrigeration Systems 519

10.3 Selecting Refrigerants 527

10.4 Other Vapor-Compression Applications 530

10.5 Absorption Refrigeration 533

10.6 Heat Pump Systems 535

10.7 Gas Refrigeration Systems 539

Chapter Summary and Study Guide 546

11 Thermodynamic Relations 554

11.1 Using Equations of State 555

11.2 Important Mathematical Relations 561

11.3 Developing Property Relations 564

11.4 Evaluating Changes in Entropy, Internal Energy, and Enthalpy 571

11.5 O