Transcript Slide 1
انتظار میرود دانشجو در پایان جلسه بتواند:
-1اصول تهویه صنعتی را بیان کند.
-2اهداف تهویه صنعتی را شرح دهد.
-3تفاوت تهویه صنعتی و تهویه مطبوع را بیان کند.
-4نحوه جمع آوری اطالعات در مورد سرچشمه
آلودگی را شرح دهد.
Outline – Controlling Airborne Hazards
Hazard Control Options
Local Exhaust Ventilation Systems
(LEVS)
Dilution Ventilation for
Contaminant Control
Hazard Control Options
Remember
Identify (Chapters 4 & 5)
Evaluate (Chapters 4 & 5)
Control (This Chapter!)
Engineering Controls .1
Administrative Controls .2
Personal Protective Equipment (PPE) .3
.1
.2
.3
Engineering Controls
Equipment design changes
Automation, enclosures, etc.
Reduce or prevent release of contaminants
Substitution
Use a less hazardous material
Work practice changes
Fundamentals of work methods engineering
Including personal hygiene
Improved housekeeping and maintenance
Constant vigilance!
Administrative Controls
Use only after engineering controls!
Control or limit human access
Worker rotation
This is a great tool, but remember it now
exposes even more workers
Worker training
Worker Training
Can be effective if consistent and appropriate
Specialized
Special work practices/procedures
Emergency situations (spills, uncontrolled releases
of contaminants, etc.)
Training effect can be noticeable immediately
following training, but these results decrease
over time without further training (Hawthorne
Effect?)
Ventilation shall mean the
provision, circulation or exhausting
of air into or from an area or space
Local exhaust ventilation
shall mean the mechanical removal
of contaminated air from the point
where the contaminant is being
.generated or liberated
"Dilution ventilation
means inducing and mixing
uncontaminated air with
contaminated air in such
quantities that the resultant
mixture in the breathing zone will
not exceed the permissible
exposure limit (PEL) specified
.for any contaminant
"Exhaust ventilation"
means the general
movement of air out of the
area or permit-required
confined space by
mechanical or natural
.means
"Tempered make-up air
means air which has been "
conditioned by changing its heat
content to obtain a specific
.desired temperature
Industrial Ventilation vs. IAQ
Heating
Ventilation
Air
Conditioning
Industrial Ventilation vs. IAQ
HVAC System Functions
Heating
Cooling
Ventilation
Filtration
Dehumidification
Humidification
Distribution
Industrial Ventilation vs. IAQ
Industrial Ventilation vs. IAQ
Routes of Entry
Inhalation •
Ingestion •
Absorption •
Injection •
Control Options
Process change
Substitution
Isolation
Ventilation
Administrative control
Personal protective equipment
•
•
•
•
•
•
Problem Characterization
AIRFLOW
EMISSION SOURCE
BURTON 2-1