Unlocking the Secrets of AHU and HVAC Systems

FREMONT, CA: HVAC systems are large installations that regulate residential and commercial buildings using fluid mechanics, thermodynamics, and heat transfer principles. The air handling unit (AHU) processes and prepares the air. 

HVAC system

HVAC is responsible for heating and cooling buildings and providing ventilation to escape moisture. These large systems, typically requiring dedicated space, consist of boilers, air conditioning units, fans, and moisture vents. They are interconnected and interrelated air control systems, ensuring efficient and comfortable living spaces.

AHU (Air handling unit) 

An Air Handling Unit (AHU) is designed to improve indoor air quality by combining various components. Air filters are essential for removing common airborne pollutants from the atmosphere, such as dust, pollen, and pet dander. Using filters is critical to keep the AHU clean and prevent harmful bacteria from growing inside.

Energy recovery components are essential for managing outdoor air temperature, and energy recovery systems (ERS) are often used to minimize energy use. Finned water-to-air compact heat exchangers are commonly used for thermal treatment, and an electrical heater can also be used for heating. A cooling coil can also have a dehumidifying effect.

Fans are vital to the AHU system, directing air to different building sections. Various fans are available, including forward-curved, backward-curved, airfoil, and backward-inclined. Software is often used to assess the AHU's static pressure and air volume to determine the appropriate fan size and type.

Silencers are often fitted to reduce noise generated by fans or other loud parts of the system. AHU systems can add or subtract moisture from the air, with humidity controlled and maintained in defined intervals. Dehumidification is achieved using a cooling coil to cause water content in the mood to condense.

The mixing chamber combines air from inside and outside to achieve the perfect combination of air for conditioning while minimizing thermal treatment requirements. An AHU is vital for maintaining a comfortable and healthy indoor environment.