Ventilation Flashcards
is the science of maintaining atmospheric conditions which are comfortable and healthful to the human body.
Ventilation
Benefits
Improved air quality
Cooling
Reduction of odors
Removal of grease
Reduced cost
Efficient ventilation can exhaust airborne contaminants, and harmful gases such as carbon monoxide created from cooking. Improve indoor air quality with a Outside Air Solution from S&P USA creating a better environment for employees and guests by exhausting polluted indoor air and replacing it with clean (sometimes filtered) air
Improved Air Quality
A cooler kitchen can be achieved by exhausting heat in a kitchen created by stoves, ovens and other cooking equipment and replacing it with cooler outside air. This replacement of air can support the air conditioner in supplying flow for the comfort of employees.
Cooling
Cooking food produces a lot of odors, from overcooked or burnt food, the smell of raw ingredients or simply the act of cooking. Together, these odors can create an unpleasant combination in the kitchen that can leak into the dining area. Ventilation exhausts these odors, creating a pleasant environment.
Reduction of Odors
The build of grease in the air can result in a coating of the walls, ceilings, floors and equipment. Specially designed units from S&P USA exhaust grease laden air efficiently, minimizing this issue
Removal of Grease
Reducing the heat in the kitchen reduces the need for cooling from a HVAC system. This lowers the operating costs and overall energy bills.
Reduced Cost
- A group of hazardous chemicals that emanate from solvents, varnishes, LPG stoves, air fresheners, incense sticks and newly renovated buildings
- Are cause in the indoor air in poorly ventilated rooms
Volatile Organic Compound (VOC)
It can be controlled by:
- Use of exhaust ventilation
- Use of low emitting materials to finish and furnish interiors as well as cleaning materials
- Limiting the usage of strong chemicals
Types of Ventilations
Natural Ventilation
Artificial Ventilation
the process of pulling fresh air into a building from the outside
Natural Ventilation
Disadvantages
- Windows cannot be used in certain types of weather e.g rainy, windy, stormy
- It may be possible to position and arrange equipment so that windows can be used for ventilation
- Open windows allow dust, dirt, flies, and other pests into the kitchen
- No form of natural ventilation can keep out bad odors and fumes
Advantages
- Cheap
- It provides light during the daytime
circulate fresh air using ducts and fans, rather than relying to air coming from the small holes.
Artificial Ventilation
There are some ways to achieve adequate artificial ventilation:
A. Exhaust or Extraction System
B. Propulsion System
C. Air Conditioning/ Combined System
it is used to carry fumes from the work place by exhaust fans which are either high or low pressure fans
Exhaust or Extraction System
is achieved by propelling or forcing clean air into a room by using
Propulsion System
a combination of exhaust and propulsion system and is the most satisfactory method of artificial ventilation
Air Conditioning/ Combined System
Advantages of Artificial Ventilation
Air can be filtered
Air flow can be controlled
Air extraction cover
Disadvantages of Artificial Ventilation
- It requires skilled supervision and maintenance
- The position of exhaust fans, vents, and ducts should be included in the construction plans
- It is expensive
- Fresh air is always more refreshing and invigorating
Lightning
Good lighting in kitchen and storage areas is very essential:
- It helps the workers to see what they are doing clearly
- It facilitates cleaning
- It increases safety by preventing accidents
- It improves overall quality and quantity of work
Two types of Artificial Lighting
- Light Produced by Combustion
- Light Produced by Electricity
Substances that burn with flame give out light and heat, examples are candles, paraffin lamps and gas lights
Light Produced by Combustion
Advantages of Light Produced by CombustionIt
is useful when there is a power interruption
Disadvantages of Light Produced by Combustion
- It causes wall blackening
- Chances of carbon monoxide formation
- More labor and maintenance is required
- Insufficient light and flame flickers
- Fire accident
does not contaminate the air but it produces a very little heat
Light Produced by Electricity
Advantages of Light Produced by Electricity
- It is convenient to use
- There is no fear of contamination
- No flicker is produced; the light is steady and uniform
- Minimum heat is produced
Disadvantages of Light Produced by Electricity
- Total blackout
- Electric shock
Location and Amount of Light
Recommendation in different areas:
Food storage area 150 to 200 lux
Preparation and wash-up areas 200 to 500 lux
Dining or service area 200 lux
