Some materials, so called Magnetocaloric Materials (MCM), heat up when immersed in a magnetic field and cool down when removed from it, almost instantaneously.
The phenomenon, known as Magnetocaloric Effect (MCE), was discovered by E. Warburg in 1881.
Enunciation of the Curie law and definition of the "Curie point", temperature beyond which some materials lose their magnetic properties
In 1933, W. Giauque was the first to use the Magnetocaloric Effect (MCE) in a magnetocaloric system that reached a very low temperature (0.25K). W. Giauque received a Nobel Prize in 1949.
PROOF OF PRINCIPLE
In 1997, the Ames Laboratory implemented a proof-of-concept using Gadolinium. Reacting at ambient temperature (~20°C), the use of Gadolinium was a milestone for all developments of magnetic refrigeration systems for commercial applications.
Cooltech Applications demonstrate a rotary device at Thermag V.
A breakthrough for the technology.
Cooltech exhibited its Magnetic Refrigeration System (MRS) at Euroshop.
MRS attained freezing temperatures.
Over 1kW barrier
First magnetic refrigeration system in the world breaking the 1kW of cooling power barrier.
Magnetic refrigeration is based on the Magnetocaloric Effect (MCE). The MCE implies that the temperature of suitable materials (Magnetocaloric Materials, MCM) increases when they are exposed to a magnetic field and decreases when they are removed from it, that is, the effect is reversible and almost instantaneous.
The temperature with the strongest effect (the Curie temperature) depends on the properties of each material. The power generated by the system depends on the type of materials and their characteristics (mass and shape).
In a Magnetic Refrigeration System, a controlled magnetic field applies a series of Magnetization-Demagnetization cycles to the magneto-caloric alloys. Each of these cycles creates a temperature gradient in the material. A rapid succession of these cycles produces the final and stabilized hot and cold temperatures in the refrigerated system.
An environmentally friendly coolant fluid (glycol water) ensures the heat transfer between the cold and the hot sources. Similar to a heat pump process, Magnetic Cooling can be adapted to any kind of refrigeration system (professional fridge, display case, home appliance...).
Cooltech Applications is the only company in the world able to produce machines way above a few hundred Watts of Cooling. It has contributed key innovations to Magnetic Cooling, to allow economically viable high capacity systems: Weak magnetic field, Multi-stage, multi loop, rotating Architecture, Simple, blade-shaped Material, Simplified and optimized Hydraulics.
Energy savings up to 50%. Today, refrigeration and HVAC accounts for 17% of the global electric consumption. It is time to change! Cooltech technology uses permanent magnets which do not require more energy source to produce the field. The system only needs a little motor and a pump to operate the system.
MCM use low footprint components and may be recycled.
Thanks to a 0 GWP, our system is compliant with all past and future environmental regulations.
Low maintenance cost
Magnetic cooling requires a low level of maintenance (low rotational speed, low pressure, no leaks and no hazardous chemicals…) which lowers the operational cost for the end use.
The energy savings allow a quick return (depending on electricity costs).
Reduced Noise & Vibrations
The magnetic refrigeration system operates with a low noise level and reduced vibrations.
Thanks to a low pressure system, the MRS ensures a better safety for end-users. The absence of refrigerant gas protects the users from hazardous leaks. Measurements were performed on all MRS types and results showed that the magnetic emissions that surrounded Cooltech’s devices at 10cm were far lower than the ones from a little fridge magnet souvenir.
Be the first into the market to use a full ecological refrigeration system.