Page 10 - Industrial Ventilation Design Guidebook

CONTENTS IX

7.2.5 Sources of Moisture Emission 429
7.2.6 Explosive Gases, Vapors, and Dust Mixtures 430
References 432
7.3 Airflow 433
7.3.1 Factors Influencing Room Airflow 433
7.3.2 Airflow in Rooms Dominated by Supply Jets 434
7.3.3 Airflow Dominated by Thermal Plume 436
7.3.4 Unidirectional Flow 440
73.5 Spiral Vortex Flow 441
7.3.6 Airflow Created by Exhaust Performance 442
References 445
Bibliography 446
7.4 "Air" Jets 446
7.4.7 Introduction 446
7.4.2 Classification 446
7.4.3 Isothermal Free Jet 448
7.4.4 Non-isothermal Free Jets 456
7.4.5 Jets in Confined Spaces 476
7.4.6 Jet Interaction 494
References 507
Bibliography 512
7.5 Plumes 517
7.5.1 Natural Convection Flows 517
7.5.2 Nonconfined and Nonstratified Environments 518
7.5.3 Plume Interaction 528
7.5.4 Plumes in Confined Spaces 532
7.5.5 Plumes in Rooms with Temperature Stratification 533
References 541
Bibliography 541
7.6 Air Flow Near Exhausts 541
7.6.1 Introduction 541
7.6.2 Capture Velocity 543
7.6.3 Air Movement Near Sinks 543
References 553
Bibliography 557
7.7 Air Curtains 553
7.7.1 Introduction 553
7.7.2 Types of Air Curtains and Their Applications 554
7.7.3 Principle of Calculation 558
7.7.4 Operation of the Air Curtain 565
7.7.5 Design of an Air Curtain Device 566
References 570
Bibliography 571
7.8 Air Movement Around Buildings 571
7.8.7 Airflow around Buildings 571
7.8.2 Infiltration and Exfiltration 579
7.8.3 Airflow through Large Openings and Gates 585
7.8.4 Controlled Airflow through an Envelope:
Principles of Natural Ventilation 587