Kington Technology

Oil-free centrifugal air compressor for hydrogen fuel cell systems, built on fully independent core technologies including foil dynamic-pressure air bearings, high-speed permanent magnet motors and high-frequency controllers (later upgraded to silicon carbide controllers). Offered in single-stage and two-stage configurations covering 30-120 kW system power, it delivers 200,000 start-stop cycles, oil-free operation, low energy consumption, compact size, light weight, high-speed direct coupling and maintenance-free service. Developed at the end of 2017, it has been deployed in volume on vehicles with tens of millions of cumulative kilometers.

Models: RDGF8.0-2.2/RDGF8.5-2.0/RDGF15-2.7/RDGF22-3.0; Matching stack power: 30-120 kW; Mass air flow: 8-140 g/s; Pressure ratio: 2.0-3.0; Maximum speed: 110000 rpm; Bearing type: foil dynamic-pressure air bearing, oil-free; Start-stop life: 200000 cycles; Ingress protection: IP67, noise level: 80 dB(A) or less

• Hydrogen fuel cell buses and coaches
• Logistics vehicles
• Heavy-duty trucks
• Fuel cell system integrator supply (SinoHytec, Shangran, Qingneng, etc.)

Two-stage (dual-stage) oil-free centrifugal air compressor series using air bearings and high-speed permanent magnet motors, covering 10-200 kW fuel cell systems: TCC15 (10-30 kW, 20 g/s airflow, pressure ratio 2.3), TCC60 (60-90 kW, 120 g/s, 2.7), TCC120 (100-120 kW, 150 g/s, 3.0), TCC150 (120-150 kW, 180 g/s, 3.0) and TCC200 (150-200 kW, 300 g/s, 3.0). The aerodynamics can be customized to customer requirements.

Models: TCC15/TCC60/TCC120/TCC150/TCC200; Matching fuel cell system power: 10-200 kW; Air flow range: 20-300 g/s; Pressure ratio: 2.3-3.0; Compression layout: two-stage centrifugal with intercooling; Maximum speed: 90000 rpm; Bearing type: air bearing, oil-free, motor efficiency 96% or higher; Ingress protection: IP67, noise level: 80 dB(A) or less

• Cathode air supply for 10-200 kW hydrogen fuel cell systems
• Hydrogen fuel cell commercial and passenger vehicles
• Custom fuel cell system development support

Single-stage oil-free centrifugal air compressor series: the SCC20 is designed for 10-40 kW fuel cell systems with 105 g/s airflow and pressure ratio 1.5, while the SCC50 targets 30-60 kW systems with 70 g/s airflow and pressure ratio 2.0, integrated with the inverter for a compact structure and small footprint. Both use air bearings and deliver oil-free, efficient and low-noise operation; aerodynamics can be customized to customer requirements.

Models: SCC20/SCC50; Matching fuel cell system power: 10-60 kW; Air flow range: 70-105 g/s; Pressure ratio: 1.5-2.0; Compression layout: single-stage direct-drive centrifugal; Maximum speed: 70000 rpm; Structure: integrated with the inverter; Bearing type: air bearing, oil-free; Unit weight: 12 kg or less, ingress protection: IP67, noise level: 78 dB(A) or less

• 10-60 kW hydrogen fuel cell systems
• Hydrogen fuel cell passenger cars and logistics vehicles
• Custom fuel cell system integration

Oil-free centrifugal air compressor series with an expander turbine for exhaust energy recovery: the TMC150 is designed for 80-180 kW fuel cell systems with 200 g/s airflow and pressure ratio 3.0, while the TMC300 targets 180-300 kW systems with 253 g/s airflow and pressure ratio 2.8. The aerodynamic performance of both compressor and turbine can be customized to customer requirements; the capability page on the official website states that the turbine compressor reduces power consumption by 12-14%.

Models: TMC150/TMC300; Matching fuel cell system power: 80-300 kW; Air flow range: 200-253 g/s; Pressure ratio: 2.8-3.0; Recovery layout: expander turbine recovering exhaust energy; Power draw cut by 12-14% versus units without recovery; Maximum speed: 80000 rpm; Outlet air temperature: 150 °C or less; Bearing type: foil air bearing, oil-free; Ingress protection: IP67, noise level: 80 dB(A) or less

• 80-300 kW high-power hydrogen fuel cell systems
• Hydrogen fuel cell heavy-duty trucks
• Hydrogen fuel cell buses

Hollow-fiber membrane fuel cell humidifier series: the MH100 is designed for 60-120 kW fuel cell systems with internal leakage below 9 SLPM under both dry and wet conditions and recommended airflow below 6000 SLPM, while the MH150 targets 120-150 kW systems with the same sub-9 SLPM internal leakage and recommended airflow below 9000 SLPM. Featuring high efficiency, high durability, low leakage and compact structure, they maintain optimal humidity of the reactant gases.

Models: MH100/MH150; Matching fuel cell system power: 60-150 kW; Recommended air flow: below 6000/9000 SLPM; Internal leakage: under 9 SLPM in both dry and wet conditions; Membrane: hollow-fiber membrane bundle; Moisture recovery efficiency: 90% or higher; Air-side pressure drop: 8 kPa or less; Ambient operating temperature: -40 °C to 90 °C, unit weight: 8 kg or less

• Reactant gas humidification for 60-150 kW fuel cell systems
• Fuel cell stack humidity management
• Fuel cell system integration

China's first independently developed air foil bearing centrifugal blower, built on four core technologies: foil dynamic-pressure air bearings (oil-free gas-film support, rotor amplitude below 0.02 mm, passing 20,000 start-stop tests), high-speed permanent magnet motors (up to 97% efficiency with variable-frequency speed control), AL7075 aviation-aluminum three-dimensional-flow impellers (five-axis precision machining, polytropic efficiency 92%, passing 115% overspeed tests) and a PLC variable-frequency automation control system (PID automatic airflow and pressure regulation with anti-surge protection). Energy-saving, low-noise, oil-free, maintenance-free, with a semi-permanent service life.

Rotor amplitude: <0.02 mm; Motor efficiency: 97%; Impeller polytropic eff.: 92%; Start-stop life: 20000 cycles; Overspeed test: 115%; Bearing: air foil (oil-free)

• Aeration in wastewater treatment plants
• Rotary kiln, primary air and desulfurization/denitrification in cement plants
• Gas transportation in the petrochemical industry
• Food and pharmaceutical, metallurgy, textiles, pharmaceutical fermentation

Compact air foil bearing blower product line listed alongside the air foil bearing centrifugal blower in the blower section of the official website (zcjsd.net), sharing the same core technology platform of dynamic-pressure air bearings and high-speed permanent magnet motors for low-airflow, low-power blower applications; detailed models and parameters have not been published on the cached pages of the official website.

Flow rate: 120 g/s; Pressure ratio: 2.5; Rotational speed: 90000 rpm; Power: 8 kW; Outlet temp.: <180 ℃; Noise: <75 dB; Protection rating: IP67; Lifespan: 20000 h

• Small-scale wastewater aeration
• Low-airflow pneumatic conveying