SARDAR PATEL COLLEGE OF ENGINEERING

o SUB : APPLIED FLUID MECHANICS

o SUB CODE : 2160602

o GUIDED BY : PROF. VAIBHAV PATEL

SR NO. NAME ENROLMENT NO.

1 DAVE RONAK D. 141240106010

2 PATEL AKSHAR K. 141240106040

3 PATEL BRIJESH R. 141240106041

4 PRAJAPATI BRIJEN V. 141240106060

VENTILATION SYSTEM

o The process of supply of fresh air and to replenish oxygen supply to

occupied and unoccupied spaces within buildings and other inhabited

structures is called ventilation

o Ventilation is necessary to:

i. Replenish the oxygen supply

ii. Dilute carbon dioxide

iii. Dilute odours, process emissions

iv. Provide air movement

v. Prevent the build up of potentially explosive vapour mixtures

VENTILATION SYSTEM

Requirements Of Good Ventilation System

o A good ventilation system should fulfill the following requirements.

i. It should admit sufficient quantity of fresh air and remove the requisite

contaminated air.

ii. It should admit clean and humid air.

iii. It should continuously change the air inside the room.

iv. It should properly control the velocity and quantity of air inside the

space.

v. The system should also control the temperature of the admitted air.

System Of Ventilation

Natural VentilationMechanical Ventilation

Natural Ventilation

Natural Ventilationo the process of supplying and removing air through an indoor space without using

mechanical systems. It refers to the flow of external air to an indoor space as a

result of pressure or temperature differences

o The benefits of natural ventilation include:-

i. Improved Indoor air quality (IAQ)

ii. Energy savings

iii. Reduction of greenhouse gas emissions

iv. Occupant control

v. Reduction in occupant illness associated with Sick Building Syndrome

vi. Increased worker productivity

WIND EFFECT STACK EFFECT COMBINATION EFFECT

Natural Ventilation

Mechanical Ventilation

Mechanical Ventilationo Mechanical ventilation systems circulate fresh air using ducts and fans rather than

relying on airflow through small holes or crack’s in a home’s wall, roof or windows.

Homeowners can breath easier knowing their home has a good ventilation.

o Benefits of using mechanical ventilation:-

i. Better indoor air quality –can remove pollutants, allergens, and moisture that can

cause mold problems

ii. More control – provide proper fresh air flow along with appropriate locations for

intake and exhaust

iii. Improved comfort – allow a constant flow of outside air into the home and can

also provide filtration, dehumidification, and conditioning of the incoming

outside air.

o Mechanical system may be classified as :

i. Vacuum system

ii. Propulsion system

iii. Air- conditioning system

Mechanical Ventilation

Vacuum System

o In this system exhust fans or blowers are installed near the celling to

extract used up air from inside and outside.

o Due to exhaustion of warm air from the room, air pressure in the room

will reduce causing flow of fresh air inside the room

Propulsion System

o In this system fresh air is forced from outside by force fans and vitiated air

is thrown out by itself or by outlet exhaust fan . E.g. air cooler at window