Presentation on Air condition

1. AIR-CONDITIONING SYSTEM

2. 2
SUBJECT: MECHANICAL ENGINEERING FUNDAMENTALS
Md. Alamgir Hossain
Lecturer (ME)
Department of Textile Engineering
Green University of Bangladesh (GUB)

3. Name ID NO
Md Mehedi Hasan 192010056
Azizul Hakim Roman 192010057
Partho Singh 192010078
Sifatullah Mubin 192010084
Md Shohidul Islam 192010088

4.  Md. Mehedi Hasan
ID-192010056

5. The Name Of Our Presentation Topic Is AIR-CONDITIONING SYSTEM

6. 1.Introduction
2.History
3.Types Of Air-conditioning
4.Circuit Diagram
5. New Invented Technology
6.Advantages
7.Disadvantages
8.Conclution
9.References

7. Air conditioning is that branch of engineering science which
deals with the study of conditioned air i.e. supplying &
maintaining internal atmospheric conditions for human
comfort respective with external conditions.
Air conditioning is the process of altering the properties of air
to more favorable conditions.
The control of these conditions may be desirable to maintain
the health and comfort of the occupants.

8. In 1902, the first modern electrical air
conditioning unit was invented by Willis
Carrier in Buffalo, New York.
The first air conditioner, designed and
built in Buffalo by Carrier, began working
on 17 July 1902.

9. 1) Window air-conditioning system
2) Split air-conditioning system
3) Central air-conditioning system
4) Package air-conditioning system

10. 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.

11.  Azizul Hakim Roman
◦ ID-192010057

12. 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.

14. 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.
The window and split air conditioners are
used for single rooms or small office spaces.
Further, these small units cannot
satisfactorily cool the large halls,
auditoriums, receptions areas etc.

15. The window and split air conditioners are
usually used for the small air conditioning
capacities up to 5 tons.
The packaged air conditioners are used for
the cooling capacities in between these
two extremes.

18.  Shahidul Islam
◦ ID-192010088

19. 19
1. Damper.
2. Filter.
3. Air conditioning unit.
4. Circulating fan.
5. Supply duct.
6. Return duct.
Figure-6: Equipment of an A/C system.

20. 20
Dry air: The mixture of different gases such as- nitrogen, oxygen,
hydrogen, carbon-dioxcide, argon etc. is called dry air.
Moist air: A mixture of water vapor and dry air is called moist air.
Saturated air: A mixture of dry air and water vapor in which maximum
amount of water vapor has diffused is called saturated air.
Humidity: It is the mass of water vapor present in 1 kg of dry air.
Absolute humidity: It is the mass of water vapor present in 1 m3
of dry
air.
Relative humidity: It is the ratio of actual mass of water vapor (mv) in a
given volume of moist air to the mass of water vapor (𝑚s) in the same
volume of saturated air at the same temperature and pressure.
Mathematically,
R =
mv
ms

21. 21
Psychrometric chart is a graphical representation of the properties of
moist air.
Dry bulb temperature lines are straight, parallel, vertical and
uniformly spaced.
Relative humidity lines are curved.
Figure-7: psychrometric chart.

22. 22
Humidity ratio lines are straight, parallel, horizontal and
uniformly spaced.
Wet bulb temperature lines are inclined and non uniformly
spaced.
The main psychrometric processes in air conditioning system
are:
1. sensible heating or, cooling.
2. humidification or, dehumidification.
3. heating and humidification. ( winter A/C)
4. cooling and dehumidification. ( summer A/C)

23. 23
1. Sensible heating or, cooling: The process of adding heat or
removing heat from a moist air without changing its humidity ratio is
called sensible heating or, cooling.
2. Humidification or dehumidification: The process of adding
moisture or, removing moisture at constant dry bulb temperature is
called humidification or, dehumidification.
Figure-8: sensible heating, cooling and humidification, dehumidification

24.  Partho Singh
◦ID-192010078

28.  Sifatulah Mobin
◦ 192010084

29. DISTRICT
COOLING
SYSTEM
CHILLED
BEAM SYSTEM

30. The Objectives :
To centralized
production of chilled
water by using district
cooling plant. The
generated chilled water
will then be channeled
to various building
blocks pre-insulated
seamless underground
pipes.

31. The Advantages
1. Improve energy efficiency
2. Protect environment
3. Save spaces
4. Improve urban view
5. Reduce manpower for operation and
maintenance

32. 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

33. Simple to design and control
Less mechanical space
Less maintenance
Increase comfort

34.  Industry Offices
 College or University Telephone exchanges
Auditoriums Receptions areas

35. ◦Air condition system makes our
life very comfortable.
We can protect hot or cold weather
by air conditioning system.

36. https://en.wikipedia.org/wiki/Air_conditioning
http://home.howstuffworks.com/ac.htm
http://www.info.com/air%20condition%20systems?cb
=21&cmp=3002&gclid=COLD2MinicwCFUsfaAodpZQIt
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https://www.google.com/search?q=air+conditioning+
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