Ventilation for Control of the Work Environment [Hardcover]

The second edition of Ventilation Control of the Work Environment incorporates changes in the field of industrial hygiene since the first edition was published in 1982. Integrating feedback from students and professionals, the new edition includes problems sets for each chapter and updated information on the modeling of exhaust ventilation systems, and thus assures the continuation of the book's role as the primary industry textbook.
This revised text includes a large amount of material on HVAC systems, and has been updated to reflect the changes in the Ventilation Manual published by ACGIH. It uses both English and metric units, and each chapter concludes with a problem set.

List of Units xiii

Preface xv

1 Ventilation for Control 1

1.1 Control Options 2

1.2 Ventilation for Control of Air Contaminants 3

1.3 Ventilation Applications 5

1.4 Case Studies 7

1.5 Summary 9

References 11

2 Principles of Airflow 12

2.1 Airflow 13

2.2 Density 13

2.3 Continuity Relation 14

2.4 Pressure 16

2.4.1 Pressure Units 16

2.4.2 Types of Pressure 17

2.5 Head 18

2.6 Elevation 20

2.7 Pressure Relationships 22

2.7.1 Reynolds Number 24

2.8 Losses 26

2.8.1 Frictional Losses 26

2.8.2 Shock Losses 28

2.9 Losses in Fittings 30

2.9.1 Expansions 30

2.9.2 Contractions 32

2.9.3 Elbows 35

2.9.4 Branch Entries (Junctions) 36

2.10 Summary 38

List of Symbols 38

Problems 39