WORKING PRINCIPLE OF AHU

WORKING PRINCIPLE OF AHU

AHU (Air Handling Unit) is a heat exchanger and heat treatment device that cleans the air and is used in HVAC systems or industrial workshops. So how is the structure and working principle of AHU? Please refer to the article below.
STRUCTURE OF AHU

Cấu tạo và nguyên lý hoạt động của AHU

AHUs are designed to fit different projects, but all types of AHUs have a common structure including:

  • Fan
  • Heater
  • Cooler
  • Air filter
  • Protective case

AHU’s principle and process of operation

The essence of AHU is a heat exchanger to treat heat and moisture in the air. The air passing through the AHU will be treated to regulate temperature and humidity using thermodynamic principles

Working principle of AHU:

When the temperature in the room, or the area to be cooled, is larger than the set temperature, the 3-way valve will open for cold water to flow through the heat exchanger to cool the air until the air flow makes the temperature inside. If the room or area is lower than the set temperature, the 3-way valve will close, and the cold water will flow through the bypass to return to the chiller.

Meanwhile, the air before entering the AHU is filtered through a pre-filter, usually a coarse filter and a bag filter (Should be cleaned regularly).

In case a higher level of cleanliness is required, use a HEPA filter as well. The ambient air after passing through the filter will contact the heat exchanger inside the AHU to produce cold air, then it will enter a recirculation chamber, finally the cold air is blown through the air ducts and then to the air ducts. room, or area using air conditioning.

The outlet air temperature is regulated by the chilled water valve and the blower speed. However, in most AHUs are not exactly absolute, AHUs are mainly used for pre-processing the airflow. In order to handle humidity accurately, people often install more FCUs in each area.

AHU is simply a heat exchanger to cool the passing air by a fan system, a heater and an indoor unit to cool the clean room.

DURATE VIET NAM COMPANY LIMITED
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Email: info@durate.com.vn
Website: Durate.com.vn
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