Saving energy by cooling with water

Lack of dependence on ambient air results in a maximum operating ambient air temperature of 70°C. Air is recirculated inside the enclosure maintaining an ingress protection category of IP55.

Cooling with water may also be considered from an energy saving perspective. Air/water heat exchangers supplied with eComfort controller have Eco-Mode control functionality. This employs an intelligent strategy to effectively target the use of energy by disabling the internal fan when the temperature inside the enclosure falls to a predetermined level below the setpoint. The fan is then pulsed periodically to ensure the accuracy of the sensed temperature before being permanently enabled when the temperature rises above the predetermined level.

Although the capital cost of a cooling system incorporating multiple air-to-water heat exchangers and a single water chiller may be greater than that of an equivalent number of refrigerant based cooling units, energy savings are said to be typically in the region of 40%.  Efficiency may be further improved by locating water chillers externally and integrating dry air coolers to take advantage of free cooling.