air con. system and its types

1. AIR CONDITIONING
SYSTEM
SubmittedTo : Charu Ma’am Submitted By : Utsav Khatri

2. DEFINITION
■ Air conditioning is the process of altering the properties
of air (primarily temperature and humidity) to more
favorable conditions.
■ The control of these conditions may be desirable to
maintain the health and comfort of the occupants, or to
meet the requirements of industrial processes
irrespective of the external climatic conditions.

3. HISTORY
■ In 1902, the first modern
electrical air conditioning
unit was invented byWillis
Haviland Carrier in Buffalo,
NewYork.
■ The first air conditioner,
designed and built in
Buffalo by Carrier, began
working on 17 July 1902.

4. FUNCTIONAL CLASSIFICATION
■ Comfort air conditioning : - Aim at giving max human
comfort to occupants/users of conditioned space .
■ Industrial air conditioning : - The conditioning creates,
controls and maintains such an environment inside the
conditioned space, that it would suit best to the needs of
industry.

5. ATMOSPHERIC CONDITIONS
FOR HUMAN COMFORT

6. TEMPERATURE CONTROL
■ Effective temp = 20 C to 23 C in summer .
■ EffectiveTemp = 18 C to 22 C in winter .
■ For Indian conditions 25 C with 60% relative humidity to 30 C
with 45 % relative humidity, with air velocity not exceeding 10
m/min .
■ During summer dehumidification .

7. HUMIDITY
■ During summer dehumidification is done so that relative
humidity is 40 to 50% .
■ During winter humidification is done so that relative humidity
is 50 to 60 % .

8. AIRVELOCITY
■ The feeling of comfort of an individual is influenced by air movement .
■ The air movement over the body decreases the body temperature .
■ Air velocity of 30 metres/minute in summer and 7 to 15 minute in winter
is recommended as comfort range for human activity .

9. BASIC ELEMENTS OF AIR
CONDITIONING SYSTEM

10. COMPRESSOR
■ Air conditioner
compressor is used
to remove the
heat-laden vapor
refrigerant from
the evaporator of
the air
conditioning
systems.

11. CONDENSER
■ The outside unit, called the a/c
condenser, contains a compressor,
cooling fins and tubes and a fan.
■ The fan sucks air through the fins and
cools a special coolant, which the
compressor then pumps into the
house to the evaporator through a
copper tube.
■ The coolant chills the fins and tubes of
the evaporator.
■ Warm air drawn from the house by the
blower passes through the evaporator
and is cooled and blown through ducts
to the rooms in the house

12. EXPANSIONVALVE
■ Expansion valves are devices
used to control the refrigerant
flow in a refrigeration system.
■ They help to facilitate the
change of higher pressure of
liquid refrigerant in the
condensing unit to lower
pressure gas refrigerant in the
evaporator.

13. EVAPORATOR
■ An air conditioner’s
evaporator coil, also
called the evaporator
core, is the part of the
system where the
refrigerant absorbs
heat.That is, it’s where
the cold air comes
from.

14. PROCESS OF AIR-
CONDITIONING

16. TYPE OF
AIR CONDITIONING
SYSTEM

17. WINDOWAIR-CONDITIONING SYSTEM
■ Window air conditioners
are one of the most
commonly used and
cheapest type of air
conditioners.
■ Window air-conditioner
units are reliable and
simple-to-install solution
to keep a room cool while
avoiding the costly
construction of a central
air system.

18. SPLITAIR-CONDITIONING SYSTEM
■ The split air conditioner
comprises of two parts: the
outdoor unit and the indoor unit.
■ The outdoor unit, fitted outside
the room, houses components
like the compressor, condenser
and expansion valve.
■ The indoor unit comprises the
evaporator or cooling coil and the
cooling fan. For this unit we don’t
have to make any slot in the wall
of the room.

19. CENTRALAIR-CONDITIONING SYSTEM
■ The central air
conditioning plants or the
systems are used when
large buildings, hotels,
theaters, airports,
shopping malls etc. are to
be air conditioned
completely.

20. PACKAGE AIR-CONDITIONING SYSTEM
■ The window and split air conditioners
are usually used for the small air
conditioning capacities up to 5 tons.
■ The central air conditioning systems
are used for where the cooling loads
extend beyond 20 tons.
■ The packaged air conditioners are used
for the cooling capacities in between
these two extremes.
■ The packaged air conditioners are
available in the fixed rated capacities of
3, 5, 7, 10 and 15 tons.
■ These units are used commonly in
places like restaurants, homes, small
halls, etc.

21. DISTRICT
COOLING
SYSTEM
CHILLED
BEAM
SYSTEM
NEW INVENTEDTECHNOLOGY FOR AIR-
CONDITIONING SYSTEM

22. DISTRICT COOLING SYSTEM
■ Central Chiller Plant–
Generate chilled water for
cooling purposes .
■ Distribution Network–
Distribute chilled water to
buildings .
■ User Station–Interface with
buildings' own air-
conditioning circuits .

23. CHILLED BEAM SYSTEM
■ It is a type of convection HVAC system designed
to heat or cooled high rise building such as
commercial building.
■ It’s primarily gives off its cooling effect through
convection by using water to remove heat from
a room.
■ Pipes of water passed through the beam
suspended short distance from the ceiling of a
room.
■ As the beam chills the air around it, the air
becomes denser and falls to the floor.
■ It is replaced by warmer air moving up from
below, causing a constant floe of convection and
cooling the room.

24. THANKYOU