HVAC is stand for heating, ventilation and air conditioning. HVAC system is mainly used to control & maintain the temperature, humidity and indoor air quality of indoor space.
HVAC system is used residential site, commercial, corporate sector and also used industry area to provide comfort and maintain health environment.
Also we are using HVAC system in our home, hospital, hotel etc but it is in small amount.
Here are three keys or components are present in HVAC system:
1.Heating: HVAC system includes various heating options such as boiler, furnace to increase the temperature in cold atmosphere. Heating system is mainly used in snowy region.
2.Air Conditioning (Cooling) : This system is used to decrease the temperature of indoor area. There are various ACs are available which maintain temperature as well as humidity.
3. Ventilation: This system mainly used in closed area like office, kitchen and hotel etc. The purpose of this system is to maintain fresh or good air in space. Also remove the air which is not pure. Also it helps AC to maintain temperature ASAP.
In facility management there are various types of HVAC. It is the technical team responsibility to operate HVAC system & maintenance will did on time for zero breakdown.
Mostly air conditioning is used in facility management. So we will understand what is air conditioning.
First we understand HVAC cycle.
Above fig show the HVAC or AC cycle. It contains mainly 4 parts which are most important.
1. Compressor:
HVAC cycle start from compressor, compressor is the equipment which compress the refrigerant at gas. When refrigerant gas enter in compressor then it was at low pressure and low temperature. Once compressor active & compress the refrigerant then it out at high pressure & high temperature.
2. Condenser:
Condenser is the basic heat exchange equipment. Condenser is basically located at outdoor unit. It also have fan whose called outdoor fan. That outdoor fan blow the air on the condenser and the heat from that gas will eliminate in atmosphere.
The refrigerant gas which is out from compressor it is at high pressure and high temperature. Then it entered into condenser or condenser coil and outdoor fan helps to remove heat from refrigerant gas. After removing heat from refrigerant gas then refrigerant change from gas to liquid state. This refrigerant liquid is at high pressure.
3. Expansion Valve:
Expansion valve is used to release the refrigerant in evaporator. Expansion valve spread the refrigerant in evaporator at lower temperatures & low pressure. Expansion valve have thermostat which detect room temperature according to that expansion valve release or spread refrigerant liquid in evaporator.
4. Evaporator:
Evaporator or Evaporator coil is the second heat exchanger in HVAC cycle and work like condenser. This is the end of HVAC cycle. Evaporator is provide what you want that is cooling. When low temperature liquid & low pressure refrigerant enters into evaporator then indoor blower blow air on the evaporator and the heat exchanged and cooling maintained into room or space.
After doing this, refrigerant go to compressor and repeat the cycle again.
There are various types of HVAC system.
1. Window AC
2. Split AC or Hi Wall AC
3. Cassette AC
4. Ductable AC
5. Package AC
6. Precision AC
7. Chiller
THANK YOU FOR SHARING SUCH A thoughtful Artical
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