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E-raamat: Portable Ventilation Systems Handbook

(NorthWest Occupational H & S, Vancouver, Canada)
  • Formaat: 390 pages
  • Ilmumisaeg: 01-Nov-2024
  • Kirjastus: CRC Press Inc
  • Keel: eng
  • ISBN-13: 9781040293881
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  • Formaat: 390 pages
  • Ilmumisaeg: 01-Nov-2024
  • Kirjastus: CRC Press Inc
  • Keel: eng
  • ISBN-13: 9781040293881
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Portable ventilation systems provide an option for supplementing installed ventilation, as well as providing a system for ventilation where none exists. Portable Ventilation Systems Handbook discusses the various types of portable ventilation systems currently in use, their advantages and disadvantages, and what systems works best for what function.
Ventilation Systems
1(20)
Introduction
1(2)
The Need for Portable Ventilation Systems
3(2)
Applications of Portable Ventilation Systems
5(8)
Fixed (Permanent) Versus Portable Systems
13(5)
References
18(3)
Ventilation Fundamentals
21(44)
Introduction
21(1)
Micro Ventilation Processes
21(3)
Atomic/Molecular Diffusion
21(1)
Turbulent (Eddy) Diffusion
21(3)
Macro Ventilation Processes
24(17)
Air Exchange Model
25(2)
Dilution/Accretion Model
27(1)
Stratification
28(9)
Short-Circuiting (Shunting)
37(1)
Local Exhaust (Source Capture) Mode
37(1)
Flow Induction
38(1)
Hot (Point) Sources
38(1)
Mechanical Momentum Sources
38(2)
Flowing Liquids and Bulk Solids
40(1)
Sprays
40(1)
Natural Ventilation Processes
41(7)
Wind
41(4)
Thermal Effects
45(2)
Combined Forces
47(1)
Mechanical Ventilation Processes
48(14)
Displacement (Plug) Flow
48(7)
Jet Flow
55(6)
Airflow in Ducts
61(1)
References
62(3)
The Ventilation Environment
65(16)
Introduction
65(1)
The Ventilation Environment
65(7)
Characteristics of the Surroundings
66(1)
Characteristics of the Structure/Space
66(2)
Containment Generation Processes
68(3)
Atmospheric Conditions During Work Activity
71(1)
Location Hazards
72(7)
Hot Work Processes
72(1)
Oxygen and Other Oxidizers
72(2)
Chemical Incompatibility
74(3)
Ignitable Atmospheres
77(1)
Contamination by Toxic/Radioactive Substances
78(1)
Particulate Transport
78(1)
References
79(2)
The Hardware of Portable Ventilation Systems
81(74)
Introduction
81(1)
Airmovers
81(31)
Airmover Performance Testing
91(1)
Modes of Power
92(2)
Axial Fans
94(9)
Centrifugal Fans
103(9)
Compressed Air
112(1)
Other System Components
112(17)
Duct
112(9)
Fittings and Accessories
121(8)
Equipment Hazards
129(22)
Combustion and Exhaust Gases
130(3)
Fuel Gases and Vapor
133(1)
Contaminated Surfaces
134(1)
Ignition Sources
134(4)
NFPA/IEC Hazardous Locations
138(1)
Portable Equipment for Use in Hazardous Locations
139(5)
Noise
144(1)
Damp/Electrically Conductive Locations
145(6)
References
151(4)
System Design and Performance
155(30)
Introduction
155(1)
System Design
155(2)
Predicting Performance from Portable Ventilation Systems
157(26)
System Resistance Curve
157(3)
Energy Losses
160(23)
References
183(2)
Ventilation Practices
185(28)
Introduction
185(1)
Literature Review of Ventilation Practices
185(6)
Laboratory Studies of Ventilation of Confined Spaces
185(4)
Field Studies of Ventilation of Confined Spaces
189(2)
Ventilation Modes
191(19)
Natural Ventilation
191(4)
Mechanical Ventilation
195(1)
Compressed Air
196(1)
Supplying Air to a Space
196(8)
Removing Air from a Space
204(5)
Simultaneous Supply and Exhaust
209(1)
References
210(3)
Ventilation Strategies
213(54)
Introduction
213(2)
Hazard Assessment for Portable Ventilation
215(20)
Assess The External Environment
215(11)
Assess Characteristics of Contaminants in the Space
226(4)
Determine Available Openings
230(1)
Consider Possible Airflow Patterns
231(1)
Select Ventilation Strategy
231(4)
Ventilation Guidelines
235(2)
Testing and Evaluation of Portable Ventilation Systems
237(2)
Putting It All Together
239(22)
Summary
261(4)
References
265(2)
Appendix A: Standards Pertaining to Portable Ventilation Systems 267(24)
Introduction
267(1)
Design and Testing Standards
267(8)
Air Movement and Control Association (AMCA)
267(2)
American Telephone and Telegraph (AT&T) EL2723/PL2709
269(2)
Colorado Engineering Experimental Station Inc. (CEESI)
271(1)
Certification for Use in Hazardous Locations
271(1)
Flame Retardance of Duct
272(2)
Ground Fault Protection
274(1)
Certification of Portable, Gas-Fired, In-Line Air Heaters
274(1)
Operational Standards
275(13)
Canadian Standards Association (CSA) Standard CAN3-Z180.1-M85
275(1)
Compressed Gas Association (CGA) Standard G-7.1
275(1)
National Fire Protection Association (NFPA)
275(10)
International Electrotechnical Commission (IEC)
285(1)
National Institute for Occupationl Safety and Health (NIOSH)
286(1)
Occupational Safety and Health Administration (OSHA)
287(1)
References
288(3)
Appendix B: Portable Ventilation System Calculations 291(60)
Introduction
291(6)
Reynolds Number
291(1)
The Moody Diagram
292(1)
Roughness
292(2)
Estimating Airmover Performance
294(2)
System Losses
296(1)
Bare Fans
297(12)
Ducted Portable Systems
309(18)
Summary of Losses
327(1)
Ventilation of Temporary Containments
327(10)
Summary of Losses
336(1)
Displacement Ventilation
337(12)
Summary of Losses
348(1)
References
349(2)
Appendix C: Practical Applications of Portable Ventilation Systems 351(14)
Introduction
351(1)
Control of Exhaust Emissions During Use of an Excavator in a Manufacturing Plant
351(2)
Description of Problem
351(1)
Solution
351(1)
Comments
352(1)
Ventilation of a Railway Tunnel During Track Rehabilitation Following a Derailment
353(2)
Description of Problem
353(1)
Solution
354(1)
Comments
355(1)
Ventilation of a Railway Tunnel During Track Replacement
355(3)
Description of Problem
355(1)
Solution
356(1)
Comments
356(2)
Emergency Ventilation of Vehicle Tunnels During Firefighting
358(1)
Description of Problem
358(1)
Solution
358(1)
Comments
358(1)
Ventilation of a Scrollcase in a Hydrogenerating Station
359(1)
Description of Problem
359(1)
Solution
360(1)
Comments
360(1)
Removal of Welding Plumes from Ship Structures
360(3)
Description of Problem
360(2)
Solution
362(1)
Comments
362(1)
Drying of Mold-Infested Structures During Rehabilitation
363(1)
Description of Problem
363(1)
Solution
363(1)
Comments
364(1)
Reference
364(1)
Index 365
Neil McManus