Rittal ‘Blue e’ enclosure cooling units

Rittal’s energy-saving ‘Blue e’ enclosure cooling units offer a cooling output ranging from 500 W to 4 kW (depending on the application) and are claimed to achieve energy savings of as much as 70%.

In terms of size and appearance, the Blue e cooling units are similar to Rittal’s TopTherm system, but with a 42% higher coefficient of performance (COP) - up from 1.2 to 1.7.

The efficiency of the cooling units is firstly related to the design of the condensers, evaporators, cooling fins, pipe bends and all the other refrigeration components.

Rittal also optimised the fan technology. Electronic commutation (EC) technology is used in most of the fan motors. In these motors, designed as external rotor motors, the traditional mechanical pole reversal is replaced by electronic commutation, which functions without wear, sparks or interference. The motors have a dynamically balanced rotor with multipolar magnets. The rotor position is recorded by several Hall effect sensors. Motor supply and control is via an external electronic operating system that has a high efficiency at all speeds. Precision bearings provide a long service life and low noise generation.

Rittal has improved the control electronics by means of new Eco-Mode controls. If an internal fan does not need to operate permanently, it is automatically switched off, so cutting energy costs.