LG Electronics has launched its new generation magnetic bearing chiller system, an oil-and-contact-free drive solution for centrifugal compressors in chillers across the UAE
LGmagnetic centrifugalBy eliminating the mechanical contact and the losses that occur with oil-lubricated bearings, the magnetic system from LG reduces energy use and costs significantly. (Image source: LG)
Combining a high-speed permanent magnet motor and active magnetic bearings with integrated controls, the magnetic system can operate with variable speed drives to deliver energy savings of at least 10 per cent versus conventional centrifugal compressor designs.
LG’s new magnetic bearing centrifugal chiller lineup is suitable for green building application and can reward with additional LEED point energy savings and refrigerant charge amounts. The chiller boasts excellent efficiency of COP 7.0 and IPLV of 12.0 at AHRI conditions. Additionally, the lineup offers a capacity range of 260RT to 1,100RT for single compressor and from 520RT to 2,200RT for dual compressor based on conditions of the Air Conditioning and Refrigeration Institute (AHRI) standard.
“Our next-generation solutions are what the HVAC industry needs today. With the rise of smart cities and green buildings in the UAE and in the region, the demand for the best solutions places LG at the forefront of the nation’s most promising residential, commercial and industrial applications. We are committed to products that are not only cutting edge and durable, but also strictly comply with the nation’s energy efficiency regulations laid down by government and green building policy makers,” said Yong Geun Choi, president of LG Electronics Gulf.
The innovative LG technology also reduces maintenance costs for the user and provides reliable and cost-effective air conditioning. Electromagnets levitate the compressor shaft, allowing it to rotate without contact. By eliminating the mechanical contact and the losses that occur with oil-lubricated bearings, the magnetic system from LG reduces energy use and costs significantly.
Without the need for oil lubrication, the system also improves heat transfer efficiency in the evaporator and condenser. In addition, the system’s vibration and nearly friction-free performance capabilities enable extremely quiet operation with a low noise level of 73db (A) at full-load condition.
The permanent magnet motor at the heart of this LG solution is more energy-efficient than induction motors at full and partial loads, and it offers a higher power factor and lower current draw due to LG’s own VSD technology with high power factor (> 0.95) and low harmonic distortion with pre-installed AC/DC reactor (THDv < 5 per cent).
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