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Air Squared Projects

Liquid-Cooled Scroll Compressor for Electric Bus

The P16H043A-AC-LC liquid-cooled scroll compressor is designed to quietly deliver high-pressure air for all-electric bus air-auxiliary systems.

P16H043E-AC-LC Liquid-Cooled Scroll Compressor
P16H043E-AC-LC Liquid-Cooled Scroll Compressor for All-Electric Transportation Applications

Continuing development of its patented liquid-cooled scroll technology, Air Squared has completed a custom scroll compressor for an electric bus application. The application required an oil-free air compressor capable of delivering 350 lpm v at 10.5 barg with nominal sound levels below 50 dB(A).

With growing populations in urban centers around the world, cities looking to reduce air and noise pollution are turning to all-electric solutions for mass transportation. Without an internal combustion, a significant source of noise on current all-electric solutions for mass transportation is the air compressor used in the air-auxiliary system. This presents an opportunity for oil-free scroll technology, which is known to operate significantly quieter than traditional compressor technology, such as reciprocating.

The P16H043E-AC-LC uses liquid cooling to provide highly effective cooling directly to the fixed scroll and orbiting scroll. For high-pressure operation, liquid-cooled scroll designs have a number of advantages over air-cooled scroll designs, such as increased efficiency, longer service intervals, quieter operation, and better ingress protection.

Design Specifications

  • Max. Discharge Pressure: 10.5 barg
  • Nominal Volume Flow: 350 lpmv
  • Max. Power: 5 kWe
  • Max. Speed: 3,500 RPM
  • Motor: 240 V AC, Three-Phase
  • Nominal Sound Level: 55 dB(A)
  • Net Weight: 60 kg
  • Dimensions: 640 mm x 260 mm x 260 mm

UPDATE (May 31st, 2018) – Sample units are available for the P17H043D-BLDC-LC liquid-cooled scroll compressor. The unit represents a third generation design with several improvements and a brushless DC motor.