جلسه پایان در دانشجو میرود انتظاربتواند:

1. کند- بیان را صنعتی تهویه اصول2. دهد- شرح را صنعتی تهویه اهدافتهویه- 3 و صنعتی تهویه تفاوت

. کند بیان را مطبوعمورد- 4 در اطالعات آوری جمع نحوه

دهد شرح را آلودگی .سرچشمه

Outline – Controlling Airborne Hazards

Hazard Control OptionsLocal Exhaust Ventilation

Systems (LEVS)Dilution Ventilation for

Contaminant Control

Hazard Control OptionsRemember

.1Identify (Chapters 4 & 5)

.2Evaluate (Chapters 4 & 5)

.3Control (This Chapter!).1Engineering Controls.2Administrative Controls.3Personal Protective Equipment (PPE)

Engineering ControlsEquipment design changes

Automation, enclosures, etc.Reduce or prevent release of contaminants

SubstitutionUse a less hazardous material

Work practice changesFundamentals of work methods engineeringIncluding personal hygiene

Improved housekeeping and maintenanceConstant vigilance!

Administrative ControlsUse only after engineering

controls!Control or limit human access

Worker rotationThis is a great tool, but remember it

now exposes even more workersWorker training

Worker TrainingCan be effective if consistent and

appropriateSpecialized

Special work practices/proceduresEmergency 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 spaceLocal exhaust ventilationshall mean the mechanical removal of contaminated air from the point where the contaminant is being generated or liberated.

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 .

Dilution ventilation"

"Exhaust ventilation" means the general movement of air out of the area or permit-required confined space by mechanical or natural means.

"means air which has been conditioned by changing its heat content to obtain a specific desired temperature.

Tempered make-up air"

Industrial Ventilation vs. IAQ

Heating

Ventilation

Air

Conditioning

Industrial Ventilation vs. IAQ

HVAC System Functions

HeatingCoolingVentilationFiltrationDehumidificationHumidificationDistribution

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

BURTON 2-1

EMISSION SOURCE

AIRFLOW