Free-cooling is available in all air-cooled chiller sizes from 50–800 kW.

Free-cooling commences when the ambient temperature is 2°C below return temperature water. A 3-way valve is activated and diverts returned water from the process to an auxiliary coil which utilises an increasing proportion of condenser fan power, instead of compressor motor power, to cool the fluid as the ambient temperature reduces.

For example, a chiller operating at water temperatures of 10°C leaving and 15°C returning would start to reduce the energy consumption at an ambient of 13°C and 100% free-cooling operation would be available at around 1°C ambient. Producing 750kW of cooling from only 24kW of condenser fan energy is extremely energy efficient. At an ambient of 7°C, the chiller can run on approximately 50% energy input with free-cooling technology.

Applications such as Data Centres which operate 24/7/365 can benefit from substantial savings on energy due to the stored power of the available ambient temperature.

To find our more please download the pdf below or view the photogallery.