This document provides a market study and overview of air conditioning systems. It discusses key HVAC concepts like air handling units, chillers, cooling towers, and the four main types of air conditioning systems. A case study is presented on the air conditioning system used at a furniture store with details on the split AC units installed, including specifications and performance. The document concludes with an overview of ASHRAE HVAC bylaws regarding ductwork, refrigerants, recirculated air, plenums, and guidelines for noise control in chiller selection and installation.

1. HEATING VENTILATION AND AIR CONDITIONING
MARKET STUDY ON AIRCONDITIONING SYSTEMS
SUBMITTED BY:
D.PRASHANTH

2. CONTENTS
 INTRODUCTION
 TERMINOLOGIES
 CASE STUDY
 INFERENCE
 HVAC BYLAWS

3. AIR CONDITIONING
 Air conditioning is the process of altering theproperties of air
to create more comfortable conditions, typically with the aim
of distributing the conditioned air to an occupied space to
improve thermal comfort and indoor air quality .
 Air conditioning can refer to any form of technology that
modifies the condition of air (heating, cooling, de-
humidification, cleaning, ventilation, or air movement).

4. HUMAN COMFORT
The four atmospheric conditions which affect human comforts are
 Temperature
 Humidity
 Air purity
 Air Movements
An air conditioner controls the above factors for us to achieve human comfort.
90% of the people are comfortable when the air temperature is between 18-
22°C and the %sat is between 40-65%.

5. AIR HANDLING UNIT
 An Air Handling Unit or AHU is a central air conditioner station that handles the air that,
usually, will be supplied into the buildings by the ventilation ductwork.
 It is a large metal box containing a blower, heating or cooling elements, filter racks or
chambers, humidity & temperature control loops.

6. CHILLER
 Chiller removes heat from a liquid via vapour-compression or absorption refrigeration
cycle.
 This cooled liquid flows through pipes in a building and passes through coils in air
handlers, fan-coil units, or other systems, cooling and usually dehumidifying the air in the
building.
 Chillers are of two kinds:
1. Air Cooled
2. Water Cooled

7. COOLING TOWER
 The Cooling tower cools the warm water by contacting with unsaturated air. The
evaporation of water mainly provides cooling.
 Water-cooled chillers are normally more energy efficient than air-cooled chillers.

8. TYPES OF AIR CONDITIONING SYSTEMS
The choice of which air conditioner system to use depends upon a number of factors including
how large the area is to be cooled, the total heat generated inside the enclosed area, etc.
An HVAC designer would consider all the related parameters and suggest the system most
suitable for your space.
Window Air Conditioner
Split Air Conditioner
Packaged Air Conditioner
Central Air Conditioning System

9. Window Air Conditioner
 Window air conditioner is the most commonly used air conditioner for single
rooms. In this air conditioner all the components, namely the compressor,
condenser, expansion valve or coil, evaporator and cooling coil are enclosed in a
single box.
 This unit is fitted in a slot made in the wall of the room, or more commonly a
window sill.

10. Split Air Conditioner
 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 you don’t have to make any slot in the wall of the room.
 A split air conditioner can be used to cool one or two rooms.

11. Packaged Air Conditioner
 This kind of air conditioner is used to cool more than two rooms or a larger space at your
home or office. There are two possible arrangements with the package unit. In the first
one, all the components, namely the compressor, condenser expansion valve and
evaporator are housed in a single box.
 The cooled air is thrown by the high capacity blower, and it flows through the ducts laid
through various rooms. In the second arrangement, the compressor and condenser are
housed in one casing. The compressed gas passes through individual units, comprised of
the expansion valve and cooling coil,
located in various rooms.

12. Central Air Conditioning System
 Central air conditioning is used for cooling big buildings, houses, offices, entire hotels,
gyms, movie theatres, factories etc. If the whole building is to be air conditioned, HVAC
engineers find that putting individual units in each of the rooms is very expensive
making this a better option.
 A central air conditioning system is comprised of a huge compressor that has the
capacity to produce hundreds of tons of air conditioning. Cooling big halls, malls, huge
spaces, galleries etc. is usually only feasible with central conditioning units.

13. CASESTUDY
BARZAN ARCADE

14. CASE STUDY
KENZ FURNISHING
LOCATION: THONDAYAD BYPASS,
OPP HILITE MALL
NO. OF FLOORS: 5
FUNCTION: FURNITURE AND INTERIOR DECOR
TYPE OF AIR CONDITIONING USED – SPLIT AC SYSTEM
LOCATION

15. CASE STUDY
A series of outdoor units are provided on
the exterior side of the building
10 outdoor units are provided on
this facade

16. CASE STUDY
There is an opening provided for the
maintainance and service

17. CASE STUDY
Interior units are provide
throughout the store

18. CASE STUDY
GENERATOR INTERIOR

19. CASE STUDY
 TYPE OF AIR CONDITIONERS USED: LG L-VOGUE
 TECHNICAL SPECIFICATIONS:
Tonnage Range 2.0TR
Cooling(watts) 6350
Compressor Rotary - R22
Power Supply(Volt/Phase/Hz.) 230 / Single / 50
Power Input (Watts) 2000
Running Current(Amps) 9.2

20. CASE STUDY
PERFORMANCE
Star Rating
3
Noise Level (Indoor)(dB) 40
DIMENSIONS
Indoor (mm)(WxHxD) 1090 x 300 x 218
Outdoor (mm)(WxHxD) 870 x 655 x 322
WEIGHT
Indoor (Kg)
13
Outdoor (Kg) 47

21. HVAC BYLAWS
 ASHRAE (AMERICAN SOCIETY FOR HEATING, REFRIGERATION AND AIR
CONDITIONINNG ENGINEERING)
 Air-conditioning and ventilating systems circulating air to more than one floor or floor
area shall be provided with dampers designed to close automatically in case of fire and
thereby preventing spread of fuel or smoke
 From fire safety point of view, separate air handling units for the various floors shall be
provided so as to avoid the hazards arising from spread of fire and smoke through the
air-conditioning ducts. The requirements of air-conditioning ducts shall be in accordance
with good practice

22. HVAC BYLAWS
 DUCT SYSTEM — A continuous passageway for the transmission of air which, in addition
to the ducts, may include duct fittings, dampers, plenums, and grilles and diffusers.
 REFRIGERANT — The fluid used for heat transfer in a refrigerating system, which absorbs
heat at a low temperature and low pressure of the fluid Ad rejects heat at a higher
temperature and higher pressure of the fluid, usually involving changes of, state of the
fluid.

23. HVAC BYLAWS
 RECIRCULATED AIR — The return air that has been passed through the
conditioning apparatus before being re-supplied to the space.
 PLENUM — An air compartment or chamber to which one or more ducts
are connected and which forms part of an air distribution system. The
pressure drop and air velocities in the plenum should be low. Generally,
the velocity in plenum should not exceed 1.5 to 2.5 m/s.

24. HVAC BYLAWS
CHILLERS:
Sizing and selecting a chiller is an important aspect in noise control. The following
guidelines may be considered for noise control:
 For rooftop installation of chillers, these may be placed on beams connected on the
elevated levels of pillars on correctly chosen vibration isolators.
 Water cooled chillers have less vibration. However, if air cooled chillers have to be
chosen, choose them with fan of less speeds and compressors must be jacketed without
compromising their ventilation requirement.
 If much more silencing is required, plan a silencer on the exhaust of the fans and also an
acoustic enclosure around the chillers. Care must be taken for the additional static
demand in the fan.

25. HVAC BYLAWS

26. HVAC BYLAWS

27. THANK YOU