Saying that Carel offers high efficiency solutions through optimised and integrated control systems capable of bringing significant energy savings and, consequently, reducing the environmental impact of data centres, Carel has launched solutions ranging from high-tech controllers and inverters to energy-saving cooling systems. Carel highlights that concentrated loads with high power density (up to 20 kW per rack) are driving the development of new types of units installed near the heat source.

These systems have low inertia, because, very often, their load varies continuously and such variations are usually quite fast. This is why it is important to have a variable speed compressor, it says.

The company lists the following solution features and advantages:

• The power+ inverter by Carel can be used to control new CRAC units with direct expansion systems that modulate cooling capacity to manage supply of air temperature.
• The device helps create redundancy.
• Designing units for 75% load with very high efficiency allows reserve cooling capacity in the event of problems on one of the units.
• The inverter can be used to control part free cooling, modulating cooling capacity to make up the remaining capacity required – something which is becoming more and more important as new solutions are developed, including integration of Direct and Indirect Evaporative Cooling, to create a mix of different cooling solutions for both energy-saving and service continuity.
• The company guarantees communication between controllers, thanks to constant research into specific technologies.