Precision air-conditioning units are usually deployed in data centers and network control centers, where they provide a constant temperature and air humidity level. The design of the air conditioners significantly influences the choice of suitable fans. In light of the considerably lower back-pressure requirements, these are also required to work at the optimum operating point to ensure that they can run energy-efficiently and save on operating costs.
A higher air flow with a lower head
To fulfill these requirements, the engineers in Mulfingen set their sights firmly on the aerodynamics when overhauling the design. By employing computer-aided optimization methods, the width of the impeller, the size of the intake area, the blade contour and blade thickness were all adapted for a higher air flow with a lower head. As a result, the new RadiCal achieves a maximum efficiency of 68.5 % at an air flow of 13,000 m³/h.
Thanks to lower flow losses in the impeller, lower turbulence and less laminar separation, the fans also have more pleasant noise characteristics. Like its predecessor, the new impeller is made of glass-fiber-reinforced polypropylene. Despite the optimization, the outer diameter and installation height have remained the same, which ensures that the tight installation space in the air conditioners is utilized to best effect.
ebm-papst products with GreenIntelligence have IoT capability and can be interconnected with any system quickly and easily thanks to plug & play. The power electronics integrated into the EC motors enable the speed to be adjusted to meet requirements by means of a 0–10 V control signal or via Modbus RTU. Thanks to Modbus RTU, numerous operating parameters can also be queried and monitored in ongoing operation alongside the control signals. At the same time, recording the operating hours facilitates preventive maintenance for effective minimization of servicing time. The new RadiCal centrifugal fans will be available for all common line voltages and frequencies from early 2019 in sizes 310 and 630.