Air Cycle Technology
Reduced power consumption up to
A key technological feature is that the turbo expander and compressor are located on the same shaft. The energy produced during the expansion process is transferred through the shaft to the compressor, which allows to reduce energy consumption up to 30% compared to vapor compression systems.
Air Bearings
Our air bearing system eliminates the need for complex oil management systems and makes our machines more reliable and maintenance-free.

When the shaft is spinning fast enough it starts to float on the air cushion created by the increased air pressure from its spinning.
European union F-Gas phase down
  • Air as refrigerant
  • No need to refilling
  • Environmentally friendly
Oil free
  • No oil in the system due to air bearings
  • Reduced costs
Legislative compliance
  • Legislative compliance
  • Compliance with all international standards / regulations
Operating stability
  • Stable loads on power grid and cooling water even in the most demanding conditions
Safe solution
  • No chemically active substances
  • No risk of fire or explosion
No vibration or noise
  • No vibration or noise
  • Turbo module design reduces noise and vibrations
Refrigeration Technology
Comparative table
Air Cycle
Vapor Compression
Liquid Nitrogen
Future Proof
Air as refrigerant
Free refrigerant
GWP = 0
Synthetic refrigerants bans
Natural refrigerants restricted by safety regulations
Transport regulations
Storage regulations
Air-bearing compressor
No contacting pairs no wear
Compressor wear
Damage by liquid refrigerant
Damage due to insufficient lubrication
No moving parts
High thermal stress
Safety / Machinery room
Low system pressure from 1 to 10 bar
No need for separate machine room
ATEX directive for respective refrigerants
Gas sensors, ventilation
Vibration damping floor
Gas sensors, ventilation
Space for LN2 storage
Only electrical cabinet filter cartridge exchange
Oil and refrigerant management
Safety valves check
Regular leakage check
Trained staff necessary
LN2 refills
Valve function check
Safety valves check
Part load
Frequency inverter included
RPM of compressor controlled automatically
Depending on system design
Usually start / stopor hot gas bypass
Dosage based
Lifecycle Cost
Almost no maintenance required
No refrigerant purchase and refills
Requires many components
Increasing price of refrigerants
Intensive costly maintenance
High long-term running costs
LN2 to be transported and stored on site
MIRAI Cold Products
Ultra-low temperature refrigeration machine MIRAI COLD works with the safest & most natural refrigerant – natural air.