Water-side Economizer Cooling

A water-side economizer is a type of economizer cooling system that uses outside air to cool water in a building’s chiller system. Water-side economizers typically use a heat exchanger to transfer the heat from the chilled water to the outside air, which is then exhausted from the building. The chilled water can then be used for cooling without the need for the chiller to run.

Water-side economizer systems are commonly used in large commercial and industrial buildings, such as data centers, where they can provide significant energy savings by reducing the load on the mechanical cooling system. They are particularly effective in areas with a dry climate and a large difference between indoor and outdoor temperatures.

One of the advantages of water-side economizer cooling is that it can provide free cooling even when the outdoor air temperature is higher than the indoor temperature. This is because the evaporative cooling effect of the water can still provide some cooling, even when the air is warm. However, water-side economizer systems require careful design and maintenance to prevent issues such as corrosion, scale buildup, and Legionella bacteria growth in the system.
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