HVAC Systems
HVAC (heating, ventilation and air
conditioning) is used in various systems including machines and technologies
used in places such as homes, offices, corridors and transportation systems
that must be designed based on environmental regulations to improve heating and
air quality.
Although the
three main HVAC functions seem separate, but in fact, all three functions work
together to achieve proper heating and air quality.
A proper
HVAC system increases the quality of ventilation and air passage and adjusts
the air pressure between different parts.
In this
system, the concept of air transfer and its removal from a space means air
distribution in that environment.
We have
understood what HVAC is and what its uses are, now we will learn about the
different parts of an HVAC system and their functions.
Heating
System
The heating
system is the heat production system in buildings.
Today, the
most common form of heating systems is the central heating system, in which, a
boiler, furnace or heat pump is used to heat water or air steam and it is
located in a central place such as the basement of a building or an engine
room.
The heat
produced in this system is transferred in different ways such as thermal
convection, conduction or radiation in the building.
Ventilation
System
Ventilation
means changing or moving air in any space. The ventilation system is used to
control the temperature or remove elements such as humidity, smell, smoke, dust,
airborne bacteria, and Carbon monoxide.
Oxygenation
in a certain range is another application of ventilation systems.
These
systems move the air inside and outside the building together and by creating
air circulation inside the building, they maintain the air quality of the
environment.
Mechanical
and natural ventilation are the two main types of air conditioning systems.
Air
conditioning system
Air
conditioning provides cool air and humidity to all parts of a building.
In buildings
optimized for the air conditioning system, the windows must be completely
closed and without seams and air passage. Opening the windows disrupts the
functioning of the ventilation system.
Air
conditioning draws fresh air into the system through a valve connected to an
internal heat exchanger and creates positive air pressure.
Heat removal
by radiation, convection, or conduction methods results in air conditioning and
cooling. Coolers work using air, ice and various chemicals.
These
coolers are either used in the heat pump system that uses a compressor to drive
the thermodynamic cycle of the cooler or they use a cooling system that
circulates cool air using a pump.
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