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Free Cooling – How You Can Save Up to 80% on Cooling Costs

Free Cooling works with either a chiller with a built-in free cooling coil or a free cooler working in series with a chiller. The latter is more efficient, due to the larger surface area provided by the free cooler. System design will largely depend on your cooling demands and the footprint of your site. Cooling equipment will need to be cited externally to take advantage of the cooler ambient temperatures.

When the ambient air temperature drops below the process fluid return temperature, a 3-way valve diverts the returning process fluid. This goes through the free cooling coil in which the cooler ambient air removes heat and cools the returning fluid.

Partial Free Cooling

At just 1°C below the process return fluid temperature, the fluid is partially cooled by the free cooler. It then flows through the chiller’s evaporator where the required set point temperatures are achieved. This eases the demand on your chiller’s components and extending their operational life.

Full Free Cooling

As the ambient air temperature continues to fall, the amount of process heat taken out of the process fluid by the air increases, progressively reducing the load on the chiller. When the ambient air temperature is 5°C below the process supply fluid temperature, all the process heat is removed by the ambient air in the free cooler – providing full free cooling.

The process fluid is therefore being cooled by the fans, rather than a compressor. The compressor is traditionally the most energy-intensive element of a chiller. Thus reducing your energy and maintenance costs and improving the lifespan of your components even further.

Watch our video here to discover the benefits such as cooling savings of up to 80% and find out more about our range here.

For more information, please call our technical experts on 0800 774 7426.

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