Hello everyone;
I hope that you all doing great at your homes !
I guess we all agree that the magnetic refrigeration is a great alternative to the conventional refrigeration system, the most known applications for that technologie are gas liquefaction (low temperature) and working magnetic refrigerators ( room temperature) , two range of temperature (low T and T around 300 K)
I would like to know the applications of this technologie at high temperature transition (around 500-600 K mostly)
Any information would be appreciated and I will be grateful to all of you.
stay safe !
Magnetic refrigeration Applications:
a) Magnetic household refrigeration appliances
- Household refrigerator without freezer
- Beverage refrigerator.
b) Magnetic cooling and air conditioning in buildings and houses
- Magnetic RAC (RAC – Room Air Conditioning unit), window, wall or ceiling mounted
- Magnetic split system (e.g. single outside heat rejection unit, multiple inner cooling units).
c) Central cooling system
- Magnetic water cooled water or brine chiller (water/water, brine/brine)
- Magnetic air cooled water or brine chiller (water/air, brine/air).
Both units may be used for fan coils, ceiling cooling or in the air-conditioning system.
d) Refrigeration in medicine
- Blood plasma storage refrigerators, cromatography and other laboratory refrigerators
- Walk in rooms (refrigeration, not freezing).
e) Cooling in food industry and storage
- Food production:
• Refrigerated silos, vessels or blenders, e.g. in diary industry
• Beverage carbonation.
- Food processing for storage:
• Hydrocooling of vegetables and fruits (by immersing)
• Forced air cooling of vegetables and flowers
• Spray chilling or brine cooling of meat
• Dry air coolers for meat.
- Food storage:
• Cold storage of fruits, vegetables and flowers
• Short term storage of meat products
• Refrigerated walk in rooms
• Cold storage rooms with temperatures above freezing.
f) Cooling in transportation
- Air conditioning in land transport
Too large temperature spans avoid that the magnetic refrigeration technology can occur for such applications. On the other hand an application of a hybrid system, namely magnetic refrigeration combined with another cooling technology, may be a feasible solution. Another option is an off-board cooling of PCM's (phase change material) and their introduction to vehicles as a passive non mechanical cooling method (at present mostly applied in trains).
- Marine air conditioning
Sea water cooled magnetic refrigerators serving as central cooling units in e.g. yachts and ships (e.g. ship carriers, ship cruisers). In large ships the possibility of introducing a superconducting-magnet-based magnetic refrigerator seems feasible. This method also could enable freezing.
- Refrigeration of food or other goods in transportation
• Refrigeration of vegetables or cut flowers in truck trailers, refrigerated mechanical rail cars, ship containers
• Centralized or decentralized magnetic refrigeration units in ships (use of sea water for heat rejection) for food storage (e.g. walk in rooms, compartments in ships, cold rooms, etc). Large carrier or cruiser ships enable use of refrigerators (or even freezers) based on superconducting magnets.
g) District cooling systems
These systems could enable the application of permanent magnets as well as refrigerators with superconducting magnets, especially because the total cooling power of such systems is usually higher than 10 MW.
h) Supermarket applications
- Living comfort (see e.g. b) and c))
- Food storage (see e.g. e))
-Display cabinets (refrigerators only) and the glass-door and chest-types of refrigerators (all such applications may be centralized or decentralized by the application of magnetic refrigeration). -
j) Cooling of electronics
Cooling of electronics by the magnetic refrigeration technology may be provided by e.g. central cooling systems and not by local devices. The main reason for this is that in the second a strong shielding of the magnetic fields is demanded. Local devices may be applied, e.g. in the surroundings of certain units (e.g. mobile telephone, etc) which require cooling.
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