Ventilation in applied fluid mechanics

1. Sub:Applid Fluid Mechanics
Topic:Ventilation.
1. PATEL YASH..(131100106042)
2. RADADIYA PRASHANT.(131100106043)
3. RAITHATHA MADHAV.(131100106044)
4. RAKHOLIYA ARUN.(131100106045)
5. SAVALIYA HARSH.(131100106049)
BRANCH: GUIDED BY:
CIVIL ENGG. PROF.NILESH RATHOD.

2.  Introduction to Ventilation.
 Types Of Ventilation.
 Methods Of Ventilation.
 Air Conditioning.
OUTLINE

3. Ventilation
• The process of "changing” or
replacing air in any space to
provide high quality indoor air
• To:
 Remove unpleasant smells and
moisture
 Introduce outside air
 Improve circulation, etc.
• In firefighting, refers to a tactic
of creating a draft to control the
release of heat and smoke

4. Reasons for Ventilation
To remove or control:
• Hazardous/obnoxious odors
• Smoke and smoke odor
• Odors
• Asbestos
• Chemicals
• Gases
• Fumes
• Particulates
Burned Popcorn-Ugh!

5. Types of Ventilation
• Vertical
 Moving air up and out
• Horizontal (lateral)
 Moving air out through
windows and doors

6. Ventilation system of a house

7. Methods Of Ventilation

8. Natural Ventilation
 Natural movement of air entering and leaving openings
such as windows, doors, roof ventilators as well as through
cracks and crevices of a building
 Heated air rises, cool air below

9. Mechanical Ventilation
• Mechanical/Forced
 Fans
 Cooling
 Dilution
 Exhaust
 Circulation
• Filtration
 Scrubbers
• Exhaust Systems
 Chemical

10. How Air Moves
• Natural
+ No cost
- Difficulty controlling
- Increased time to utilize
• Mechanical/Forced
+ Easy to control direction
- Need power source
- Fumes
- Cost

11. Air Conditioning systems
 Air conditioners
 Use work to transfer heat from cold to hot.

12. Air Conditioning

13. Air conditioners
 An air conditioner
 Moves heat from cold room air to hot outside air
 Moves heat against its natural flow
 Must convert ordered energy into disordered energy
 So as not to decrease the world’s total entropy!
 Uses a “working fluid” (chlorofluorocarbons –freon-,
hydrofluorocarbons)to transfer heat
 This fluid absorbs heat from cool room air
 This fluid releases heat to warm outside air

14. Total Air Conditioning

15. Central Air conditioning
 Circulate cool air through a system of supply and
return ducts. Supply ducts and registers (i.e.,
openings in the walls, floors, or ceilings covered
by grills) carry cooled air from the air conditioner
to the home.
 This cooled air becomes warmer as it circulates
through the home; then it flows back to the
central air conditioner through return ducts and
registers

16.  www.google.com
 www.wikipedia.in
 Applied fluid mechanics by R.P Rethaliya.
References: