Case story | Danfoss Inverter Scrolls A major solution provider in information and communication opts for Danfoss inverter scrolls Which leads to huge energy savings, higher sustainability and process reliability. energy savings, accelerates ROI and reduces carbon footprint by 60%. Addressing high energy costs and the data center industry’s increasing demand for energy efficiency, a leading global information and communication solution provider prescribed Danfoss inverter compressor and drive for its close controls in data centers. The benefits are as much energy savings as sustainability and process reliability. Have a deeper look in the vision of this global key player. Growing pressure on energy efficiency in data centres globally With the rapid growth of data centres, the energy consumed in cooling the servers is almost several hundred times more than the energy used in offices. It can equal to 1.5% of the electricity used by a whole country, or the yearly energy consumption of a city like Tianjin in China. According to other estimates, it represents 2% of the greenhouse emissions. The trend is the same all over the globe, in India, in Europe and in America. Increasing the efficiency of data centers is no longer an option. The cooling requirements of servers account for the majority of power consumption – between 35 to 40%. Reduce energy consumption and meet the new energy standards Due to variations in the external ambient temperature and also fluctuations in the operations in server rooms, the air-conditioning is most of the time operating in part-load conditions. This is where variable-speed technology makes a dramatic difference compared to other modulating technologies. Capacity modulation is a way to match cooling capacity to cooling demand. Modulation with variable-speed technology is the most accurate and efficient method. The inverter drive slows down or accelerates the compressor motor speed. This method varies the refrigerant flow by actually changing the motor speed inside the compressor. Variable-speed technology can greatly reduce energy consumption in systems working under part-load conditions. A 35 kW precision air-conditioning system using a 13 TR VZH088 inverter scroll compressor can under typical conditions provide a reduction of 8,000 to 10,000 kWh per year, which represents a drop of 32% of energy when compared with a 12 TR fixed-speed compressor. This corresponds to annual reduction in CO2 emissions of 2740 kg per unit (-64%). The energy offset obtainable with variable-speed technology is well known by all the stakeholders, from the OEMs to the end

users. However, the awareness about the other benefits is much lower. Return on investment of using variable-speed technology can be lower than 3 years. On top of this, meeting the new energy standards is made easy with inverter technology. Reliability 365 days per year Contrary to general comfort air conditioning, IT hubs work 24 hours per day and 365 days per year. Heat is generated and radiated in large quantities by equipment in the server rooms. There is therefore a need to remove heat, accurately control the temperature and humidity levels and to filter air in an efficient way. VZH inverter...