HVAC is the combination of heating, ventilation, and air conditioning systems.
HVAC is the system that maintains the required surrounding environmental
conditions for the desired area.
Components of hvac systemIt tempers the local conditions either by heat addition or cooling.
The flow of clean air helps to maintain the desired humidity within the required
area.
HVAC Systems are classified in two categories
Centralized air conditioning system
In a centralized air conditioning system, the air is conditioned at one central
point in the building and then sent through ducts to the other parts of the
building. They provide easy to maintain consistent temperature environment in
different rooms and it has less maintenance difficulty problems. It is cheaper
to maintain a centralized HVAC system.
Decentralized or local air conditioning system
Decentralized or local air conditioning system is the opposite of the central
HVAC system. In it, multiple units are used to meet HVAC requirements instead of
a single centralized system. Its lowers the cost and increase the control of the
heating, ventilation and cooling as it is easy to maintain different
temperatures at different places. But it increases the maintenance points. It
has a benefit that the whole system will not collapse if just one-unit stop
working which is the case in the centralized HVAC system.
Types of HVAC systems available today are:
- Split and window AC
- Ductless Split Systems
- Packaged heating & air conditioning system combined
- Geothermal HVAC Systems
An HVAC system consists of various components. Some of the main components are
discussed below:
Thermostat
Thermostat is used to control the temperature within the required area. It
senses the temperature of the surrounding and regulates the HVAC system to
obtain the desired level of conditioning.
Condenser unit
The purpose of a condenser unit in HVAC system is to condense the
high-temperature refrigerant gas into liquid stage to be sent to the evaporator
coil for cooling purpose.
Evaporator coil (Components of HVAC system)
The purpose of evaporator coil in HVAC system is to cool the external air using
the condensed refrigerant from the condenser. It is used to evaporate the liquid
refrigerant present within the coils which in turn cools the incoming air.
Furnace (Combustion Chamber)
Components of HVAC system
Furnace is the most important part of HVAC system. The purpose of furnace in
HVAC system is to produce heat. Furnace create heat in many ways depending on
application of uses and design. As an example, Gas furnace, Oil furnace and
Electric furnace. The heating is usually produced by the combustion of fuels or
gas.
Heat Exchanger
The purpose of heat exchanger in HVAC system is to heat the incoming air
in winters. It is located with the furnace part where it exchanges heat with the
cool atmospheric air to deliver air at required temperature by the thermostat.
Blower (Components of HVAC system)
The purpose of blower is to suck air from the atmosphere to and give it kinetic
energy so that it can move with the ducts easily.
Duct system
Duct system distribute air to the required location from one part to the other.
They have usually rectangular, cylindrical and oval shape.
Vents
Vents are present at the ends of the ducts to deliver conditioned air to the
required rooms and places.
Diffusers
Components of hvac systemts of HVAC system
Diffusers are used to reduce the flow of the air by hindering their path. They
may be installed within the duct work or at the end of the ducts.
Application Of HVAC
- Commercial
- Residential
- Industrial
- Hospital
- Pharmaceutical’s
- Educational institutes.
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