High performance low temperature steel hardening system energetically optimised for minimum operating costs at temperatures down to -140°C.
High performance low temperature steel hardening system energetically optimised for minimum operating costs at temperatures down to -140°C.
Cryogenic steel treatment is carried out at temperatures between -70°C and -120°C for one hour. It increases hardness and wear resistance by converting a higher proportion of austenite to martensite. This process is usually performed using liquid nitrogen. The requirement of nitrogen is very high and results in significant operating cost.
We have developed a new concept for a rapid cooling room that uses only air as a refrigerant. Temperatures between -40°C and -120°C are generated by the Mirai Intex air cycle machine. The cooling room for cryogenic steel hardening consists of two rooms separated by a permeable barrier. Therefore, two different batches can be hardened in one machine. A heat exchange takes place between a new batch and the warm batch before the warm batch has to be cooled down to the required temperatures using an air cycle machine. This saves some of the refrigeration capacity required for cooling and reduces operating costs. Our solution is more efficient than existing technologies over a wide temperature range. It is also free of regulations, safe for the environment and requires little maintenance as it uses only air as a refrigerant.
The chamber consists of stable isolation panels with ram protection and is installed on a mobile base frame.
Efficient cold air refrigeration technology from Mirai Intex is used. This technology is oil-free, has low vibration and uses air as a refrigerant. As a result, it is free of refrigerant regulations and the speed-controlled turbo compressor allows flexible temperature settings down to -140 °C. In addition, a high cooling rate can be achieved if required.
Our systems come with an industrial control unit from Siemens including operating panel, LED lamps and acoustic signaling device. This allows the system to be operated quickly and easily. The system operator receives information about the status of the system via the signal lights. He can also intervene manually in the process via the authorization levels on the operating panel.
Reliable, durable, efficient and safe for people and the environment!
The energy can be recovered from previous batches and used to pre-cool the next batch due to the separation of the cold and hot oven and the double chamber system. This can result in energy savings of up to 60%.
The air in the chamber is used as the refrigerant thanks to the system design of the cold air chiller from Mirai Intex. The chamber is cooled by drawing in heated air, which is then exhausted via the Mirai Intex snow catcher. The system enables a continuous process without defrosting and impresses with its high temperature stability.
A ceiling fan specially developed for this application ensures a high circulation rate in the chamber and optimum temperature distribution.
Air as a refrigerant is safe, free of charge and free of regulations. The systems are built specifically for low temperatures.
Proven technology - Made in Germany. Low-wear and redundant.
Individually customized to your requirements. Operation design with freely selectable temperatures with high power density.
Speed-controlled, energy storage with reduced load peaks in the electricity and cooling water network.
Natural refrigerant without high pressures.
No leak test, air-bearing compressor = no wear, no oil. High-quality system technology.
Refolution supported me in the technical verification of design and dimensioning of a Natural Refrigerant Cooling System for a new Freeze Dryer system.
I was very happy with the immediate support and competence of the Refolution Team. Thanks for your help.
