UNIVERSITY OF HOUSTON – DOWNTOWN

 

ENGR 4310 - INDUSTRIAL HYGIENE INSTRUMENTATION

 

LECTURE NOTE OUTLINE – LOCAL EXHAUST VENTILATION

CHAPTER 19

 

WEEK 13

 

I.                    Types of Industrial Ventilation

A.                 Dilution

B.                 Local Exhaust Ventilation (LEV)

 

II.                 Local Exhaust System Components

A.                 Hoods

1.                  Capture

2.                  Enclosure

3.                  Receiving

4.                  LEV - Slot and Canopy

B.                 Ducts

C.                 Fans

1.                  Radial-blade fans

2.                  Forward-curved blade fans

3.                  Backward-inclined/backward-curved blade fans

D.                 Air Cleaners

1.                  Particulates

a.                   Filters

b.                  Electrostatis precipitators

c.                   Cyclones

d.                  Wet scrubbers

2.                  Gases and Vapors

a.                   Absorption

b.                  Adsorption

c.                   Oxidation or combustion

E.                  Make-Up Air

 

III.               Airflow and Pressure Principles

A.                 Airflow Principles

B.                 Pressure Concepts

1.                  Static Pressure

2.                  Velocity Pressure

3.                  Hood Static Pressure/Entry Loss

4.                  Pressure Loss in Ducts

5.                  Fan Pressure

 

 

IV.              LEV Performance Evaluation and Improvement

A.                 Smoke Tube Tests

B.                 Velocity Measurements

C.        Static Pressure Measurements

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNIVERSITY OF HOUSTON – DOWNTOWN

 

ENGR 4310 - INDUSTRIAL HYGIENE INSTRUMENTATION

 

LECTURE NOTE OUTLINE – DILUTION VENTILATION OF

INDUSTRIAL WORKPLACES – CHAPTER 20

                               

WEEK 13

 

I.                    Dilution Ventilation Systems

A.                 Natural Ventilation

B.                 Mechanical Ventilation

 

II.                 Dilution System Design Considerations

A.                 Safety Factors

B.                 Layout

 

III.               Dilution Airflow Calculations

A.                 Health

B.                 Fire and Explosion Prevention

 

IV.              Fans for Dilution Ventilation

 

V.                 Ventilation of Normally Unoccupied Enclosed Spaces

 

VI.              Measuring Dilution Performance

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

UNIVERSITY OF HOUSTON – DOWNTOWN

 

ENGR 4310 - INDUSTRIAL HYGIENE INSTRUMENTATION

 

LECTURE NOTE OUTLINE – GENERAL VENTILATION OF

NONINDUSTRIAL OCCUPANCIES – CHAPTER 21

                                

WEEK 13

 

I.                    General Ventilation

 

II.                 Energy Conservation vs. IAQ

 

III.               Terms

 

IV.              Heating, Ventilation, and A/C Systems

A.                 Zones

B.                 Constant-Volume

C.                 Variable Air Volume

D.                 Unit Ventilators

E.                  Air Mixing

F.                  Dampers

G.                 Terminal Devices

H.                 Return Air Systems

 

V.                 HVAC Sources and Causes of IAQ Problems/Standards

A.                 Issues

B.                 Consensus Standards

1.                  ASHRAE 62-1999

2.                  ASHRAE 55-1992

3.                  ASHRAE 52-1992

C.                 Regulatory Standards

 

VI.              Testing, Troubleshooting, and Maintaining HVAC Systems

A.                 Testing

B.                 Troubleshooting

C.                 Operation and Maintenance