What is VAV System in HVAC?
Variable air volume in HVAC systems offers several benefits to humanity. It works as shielding and provides the highest comfort. VAV is a ventilating, air conditioning, and heating system offering sufficient safety against changing weather conditions. It is equipped with a supply duct that cools or heats the environment by providing an air supply at the desired temperature. Its complete phenomenon depends on the supply of the air temperature, which helps add or decrease heat in an environment.
So, all in all, a VAV system is a reliable way by which suitable room temperature in a given environment is controlled using dynamic changes in air quantity. A variable air volume system includes furnaces, major ducts, thermostats, secondary ducts, air handlers, VAV boxes, condensing units, and diffusers. Other supportive parts have fans, filters, heating and cooling coils, and fire dampers. All the components are synchronized to offer a comfortable and cozy ambiance in a building.
Different parameters for variable air volume system in HVAC
1. Humidity: An enclosed space with no major openings needs an efficient VAV system, as a massive rise in humidity can be hazardous. Places like conference halls require a VAV system to eliminate the humidity.
2. Heating: Heating is a major furnace function in the VAV system. It has heating coils in the duct to provide heating.
3. Cooling: Cooling is also a major function of a VAV system, distributed according to demand. The cold air is managed to maintain the desired ventilation needs.
4. Temperature: the air volume delivered is set at a specific temperature to control the temperature of the space. The air is distributed by the VAV boxes using a thermostat.
5. Pressure: VAV systems can depressurize different areas to offer efficient thermal comfort using a dynamic approach.
Features of a VAV system
The VAV air conditioning system has several benefits:
1. Enhanced optimization and low-volume air flow sensors offer high and low-range air offering better environmental comfort.
2. VAV system is decked with low-noise actuators and an air valve DC motor to offer enhanced environmental comfort.
3. It includes precise temperature comfort control and air quality control parameters to promote energy saving and comfort.
4. It also has a demand control strategy to offer minimum energy consumption.
Benefits of a VAV system
1. The system offers a very small margin of error. You can easily maintain the temperature within a one-degree difference.
2. It offers the highest efficiency of an HVAC system.
3. The operational cost of using VAV air conditioning is lower than others.
4. It needs minimal upkeep.
Cons of a VAV system
1. The system needs some air for circulation and filtration.
2. A lack of maintenance can lead to noise pollution. Hence, time-to-time service is essential.
Points to keep in mind when installing a VAV system
1. Do not oversize the VAV systems.
2. Install the system by focusing on diversity. Ensure to spread the load through different supply ducts
3. Keep a check on the VAV terminal block for minimum and maximum flow, as it helps in the right maintenance of the system
VAV in HVAC system is one of the most enhanced and robust temperature modulation systems offering efficient benefits.
