Yes, an Air Handling Unit (AHU) can function without a chiller. The main purpose of an AHU is to circulate and condition air throughout a building, and it can achieve this in different ways:
With a Chiller:
In a typical air conditioning system, the AHU works in conjunction with a chiller. The chiller provides a constant supply of chilled water. This chilled water then pumps through a coil within the AHU. As warm air from the building passes over the coil, it is cooled down and then distributed throughout the space.
Without a Chiller:
Here are some alternative methods for AHUs to condition air without a chiller:
Heating Coil:
The AHU equippes with a heating coil instead of a cooling coil. This coil can be heated by steam, hot water, or electricity. As air flows over the heated coil, it warms up and then distributed throughout the building. This is useful in applications where heating is the primary requirement.
Natural Cooling:
In some climates, fresh air can be cool enough to provide adequate comfort without additional cooling. An AHU design to bring in and filter outside air, reducing the need for mechanical cooling. This approach often uses in conjunction with ventilation strategies for improved indoor air quality.
Evaporative Cooling:
This method uses the natural process of evaporation to cool air. An AHU equippes with a humidifier that adds moisture to the air stream. As the water evaporates, it absorbs heat from the air, resulting in a cooling effect. This method is most effective in dry climates.
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