4. NEED OF HVAC SYSTEM
• Improvement of the air quality
• Moisture regulation
• Maintenance of the constant temperature throughout
the year
5. HVAC COMPONENTS
• Furnace
• Heat exchanger
• Ducts
• Vents
• Air Conditioning Unit
• Evaporator Coils
• Condensing Unit
6. FURNACE
• As part of the HVAC, the furnace
heats the air that circulates in the
Industry.
• The quality of air in the Industry
can be influenced by how often
you change the air filter on your
unit.
• Usually the Air Conditioner is
outside, and the furnace is inside
the Industry.
• The HVAC uses the same venting
system for both.
7. HEATING
of groupsCONVECTION-Collective movement
of molecules within fluids , through diffusion
CONDUCTION -Transfer of internal energy by
microscopic diffusion and collisions of particles within a
body due to a temperature gradient.
RADIATION- Electromagnetic waves (EMR) travel
through a vacuum or through matter-containing media.
8. DISTRIBUTION OF HEAT
AIR-
• Warm air systems distribute heated air through duct
work systems of supply and return air through metal
or fiberglass ducts.
• Many systems use the same ducts to distribute air
cooled by an evaporator coil for air conditioning.
9. VENTILATION
MECHANICAL OR FORCED-
Provided by an air handler and used to control indoor air
quality.
• Excess humidity, odours, and contaminants can often be
controlled via dilution or replacement with outside air.
10. AIR CONDITIONING UNIT
An air conditioner is like a refrigerator without the
insulated box. It evaporates a refrigerant, like Freon, to
provide cooling.
Most Air Conditioners Have:
– A compressor
– An expansion valve
– A hot coil (on the outside)
– A chilled coil (on the inside)
– Two fans
– A control unit
11. • Heart of the system, belt driven pump that fastened to engine.
• Responsible for compressing and transferring refrigerant.
Advantages:
• Very high volumetric efficiency (almost 98%)
• Lesser Noise and lighter compared to rotary compressor.
COMPRESSOR
12. CONDENSER
• Responsible for heat dissipation. The condenser is designed to
radiate heat.
• Located in front of the radiator. Require good air flow when
system is in operation
• Plate fin type heat exchanger with micro channels used.Very
compact and better heat transfer capability.
• Hot compressed refrigerant vapour cools at constant pressure to
liquid.
13. EVAPORATOR
• Heat absorption component.
• Used remove heat from the inside of INDUSTRIES.
• Secondary benefit - dehumidification.
• Unconditioned air passes through a filter before entering the
evaporator.
• Plate-fin evaporator with micro channels used.
14. HEAT PUMP(HP)
• A machine or device that moves heat from one location (the
source) to another location (the mechanical work)
• Can produce heating or cooling by reversing the direction of heat
flow
• Can be used in:
– Forced Air System
– Hot Water System
– Radiant Heat System
