MIRAI Cold 23 T – an air cycle refrigeration machine designed to provide and maintain ultra-low temperatures from -40 °C down to -110 °C in cooling processes in numerous industries, especially in the freeze-drying/lyophilization application.
MIRAI Cold 23 T operates in a closed cycle as an indirect refrigeration system with Air as a refrigerant. The machine comes with a factory-equipped heat exchanger which is optimized to work with silicone oil (also compatible with other working fluids). A system is a standalone unit that requires minimum servicing and maintenance.
MIRAI Cold is a new generation of sustainable refrigeration machines using the air cycle technology (reversed Brayton Cycle).
Air Cycle Technology is based on the heating capability of air during compression and cooling down during the expansion process. Repetition of compression and expansion cycles allows us to reach and maintaining ultra-low temperatures down to -110 °C.
|MODEL NAME||MIRAI Cold 23 T (MC 23 C/W/T)|
|TEMPERATURE RANGE||from -40 °C to -110 °C|
|OPERATION CYCLE||Closed cycle|
|REFRIGERATION CAPACITY||Up to 15.7 kW|
|RATED MOTOR POWER||23 kW|
|NOISE LEVEL||73 dB|
|MAXIMUM ROTATION SPEED||51 000 rpm|
|DIMENSIONS (L x W x H)||199 x 206 x 242 cm|
|WEIGHT||2 800 kg|
All MIRAI Cold machines are supplied as stand-alone units with required insulation and removable housing cover. The control panel is rated IP66.
MIRAI Cold machines have an integrated control system that allows the customer to communicate with their control system using the digital communication protocols ProfiNET, EtherCAT, EtherNET/IP and Powerlink, which provides easy integration. The system offers real-time monitoring, data archiving at specified intervals, and remote monitoring as an option.
One of the key features of the technology is, that the turbo-expander is located on the same shaft as the turbo-compressor.
The energy produced during the expansion process is shared by the compressor, thus significantly reducing energy consumption. This feature allows us to reduce energy consumption by 30%, as compared to conventional systems.
Closed refrigeration cycle
In the case of a closed cycle machine, the ultra-cold air is circulating only inside the refrigeration machine in a closed loop. For that reason, closed-cycle machines have to be equipped with an additional heat exchanger for the secondary working fluid. As a result, two closed loops intersecting in the additional heat exchanger inside the refrigeration machine. The primary loop is operating with the Air and the secondary loop is operating with the secondary medium. The best example of a secondary medium would be silicone oil for which MIRAI Cold machines are optimized. There is a possibility to use other secondary mediums as well. The secondary loop is closed by an additional device depending on the application. It could be an oil tank for silicone oil or another heat exchanger.
Applications of closed-cycle machines include process cooling, gas liquefaction, shock freezing, and especially freeze-drying/lyophilization processes. MIRAI Cold closed-cycle machines could be easily retrofitted to freeze dryers that use conventional or outdated methods of cooling as well as a refrigeration unit for brand new installations.
The system requires pressurized air supply from 6 to 8 bar with the air quality of the second category. Dew point at -40ºC. The automated machine pressurization system is available as an optional accessory.
In case you believe that you need a solution that is more specific please send us detailed information about your conditions through our configurator and we will provide you with the right solution for your needs.
Air as refrigerant
No need to refilling
No vibration or noise
Turbo module design reduces noise and vibrations
No chemically active substances
No risk of fire or explosion
Reduced power consumption up to 30%
No oil in the system due to air bearings
Temperature accuracy of 0.5 °C
Frequency inverter allows maintaining 0.5 °C accuracy
Reduced operating costs
Long lifecycle of equipment due to the lack of contacting pairs and chemically active substances
Easy to operate, service and maintain
Real-time monitoring system
Ability to integrate software intervals
Data archiving at specified intervals
Stable loads on power grid and cooling water even in the most demanding conditions
Compliance with all international standards / regulations
The advantages of properly freeze-dried products are that they do not need refrigeration and can be stored at ambient temperatures. A freeze-dried product retains its original nutritional value, texture, product shape, and taste. It is the fresh product with just the water removed – and nothing added.
MIRAI Cold refrigeration machines are compatible with any industrial process due to safety of the refrigerant, lack of the oil in the system and exceptional reliability of the system.