The Swiss Tower is a 40-story high-rise building in Dubai that houses offices and luxury apartments. The building is constantly supplied with fresh, cooled air from a total of four air handling units (AHUs). The aim of the retrofit was to use energy-efficient fans and set up a demand-oriented control concept to reduce energy costs and increase the service life of the system.
An efficient complete solution
Thanks to the "matrixAir+ EC" solution from Qey, a company from Dubai, it was possible to install the new fans quickly and easily. This fan package, consisting of fan terminal boxes, fan bulkheads, control panels and RadiPac fans with EC technology from ebm‑papst, was delivered as a complete solution. The compact design and low weight of the RadiPac compared to a single large AC fan ensured that the replacement was easy. A total of 26 RadiPac were installed as a FanGrid in the intake and outlet section of the four AHUs. This redundant design increases the reliability of the system and provides greater operational reliability. The service life of the system is also extended by operating several small EC fans at partial load as required instead of a large AC fan constantly at full load, as was previously the case. The air also flows through upstream and downstream components, such as filters or heat exchangers, more evenly. This leads to more efficient heat transfer and air filtering, in turn reducing the operating costs of the system. In addition, the RadiPac EC fans have a high motor efficiency level of over 90%, contributing to significant energy savings compared to conventional AC motors.
Demand-based fresh air supply
The second part of the retrofit involved upgrading the control system. Thanks to the security scans at the inlet and outlet, data was available on the building's capacity utilization according to the time of day. In cooperation with Taka Solutions, Qey used this data to determine the air flow requirements depending on the time of day and programmed a schedule for optimized control of the building ventilation using a software specially developed for retrofit projects. The RadiPac RS485/MODBUS RTU interface provides the perfect conditions for this, as it enables the fans to be controlled according to requirements while also allowing the operating data of each individual fan to be monitored. These measures resulted in a reduction in energy consumption by more than 60%.
ebm-papst's energy-efficient fans to modernize AC system in Dubai
Mon Jun 05 09:11:46 CST 2023
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