At the 2009 Hanover Fair, Rittal presented a new output category of cooling units, with a cooling output of up to 2000 W, in addition to its 1000 W units. The comparative measurements at a European car maker, comparing a series unit from the Rittal TopTherm family and new Cool Efficiency series of cooling units have been available since October 2008. The new "Cool Efficiency" cooling units use just 97.1 W/h, compared to a power consumption of 178.2 W/h recorded with series units, so needing as much as 45% less energy. Besides the energy costs, users can also significantly reduce environmental pollution with the aid of Cool Efficiency. The units, based on Rittal's series SK 3304 TopTherm Plus wall-mounted units, also cut CO2 emissions by 45%. These significant savings are achieved by using the latest refrigeration compressor and fan technologies, and through an improved arrangement of heat exchanger components and refrigerant filling capacities. EC (electronic commutation) technology is employed with the fan motors. The external rotor motors with electronic commutation have a dynamically balanced rotor with multi-polar magnets, with the rotor position recorded by three Hall-effect sensors. Motor supply and control is via an external electronic operating system. Precision bearings ensure a long service life and low noise generation. The compressors are also similarly state-of-the-art. By using the components at an ideal operating point, extended running time is ensured. By reducing the switch cycles, the reliability of the components in the control cabinet can be enhanced ("stress-free-cooling"). These new products employ nano-coated condensers and integrated electrical condensate evaporation features as standard. Constant efficiency levels and minimal maintenance costs are thus guaranteed.
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