I had an idea. A Cobalt-Gadolinium alloy can be tuned to have desired curie temperature even below 10 Celsius. I watched a video on force buoyancy by Action Lab using magnetic fields (Osmium on ferrofluid when subjected to a magnetic field). My idea would be a system that used a combination of magnetic fields and a thermoacoustic generator (for liquefaction of granular material and creating temperature differences) to reduce the buoyancy of the material below the Curie temperature and separate particles based on temperature. A system based on this may benefit by incorporating the magneto caloric effect but it would not be necessary. As with just about any idea there are issues. Price of materials, is it more effective then currently used techniques etc.
We are currently still in earlier stages of trial and optimization of these systems, so it is not yet possible to estimate when they will be available for customers and how much they will cost. Stay tuned for further updates!
The technology certainly has the potential to outrun current compressor based systems in terms of efficiency. But precise predictions cannot be made yet, since the technology is still in the early stages of development.
Excellent point! This is exactly the problem with wind turbines, electric vehicles, and catalytic converters. The amount of energy and pollution required to mine, purify, and ship these heavy rare earth metals is monumental. All of this almost never gets figured into the efficacy of the technology i mentioned
Dear Sebastian, thank you for your interest! We have built several systems based on this approach, resulting in temperature differences between heat sink and source between 2 K and 8 K. Currently, we are working on further increasing this temperature difference.
Miniature versions are currently not available, because we are still in the early stages of development. As to your second question: the advantage of magnetocalorics compared to thermoelectric is its potentially larger energy efficiency. Hope that helps!
@@FraunhoferIPM So they are even more efficient than traditional refrigeration technologies like Stirling cooling? I'd want try to use something for camera cooling to increase signal/noise ratio.
@@RynaxAlien Indeed, magnetocaloric cooling has the potential to show larger efficiencies than other state-of-the-art cooling technologies. The challenge is to get the very good material performance into a working system. Up until today, the best published efficiency values are about 60% of Carnot.
@@knorkeize At the current stage, we cannot make precise predictions for the future; a lot of questions still have to be answered. We are moving forward one step at a time. At the moment we are conducting a study with manufacturers and users of the technology in order to address some of the open questions.
Thanks for your interest! Fraunhofer IPM is one of the Fraunhofer institutes and is based in Germany - however, the Fraunhofer Gesellschaft also has establishments in the US. For further info, please have a look at the Fraunhofer Homepage: www.fraunhofer.de/en/institutes/international/north-southamerica/fraunhofer-usa.html.
It may be more dangerous than cooling by changing the phase of the material, as it is a magnetic effect on the metal where the magnetic field messes with the metal particles and makes them radiate! Or absorb, unlike the current cooling system that depends on phase change, it is Similar to what happens in nature.
Hello, if you are referring to open positions at Fraunhofer IPM, these are available at: www.ipm.fraunhofer.de/en/jobs-career.html. For general interest in our research you can always contact our Thermal Energy Converters Department: www.ipm.fraunhofer.de/en/bu/energy-converters-thermal.html. Hope this helps!
Magnetic fields provide heat🔥 forever? ¿???? Since two 2⃣✌magnets are stick to each other and it will produced heat 🔥at long time⌚ 🤣🤣🤣🤣🤣🤣 So how much heat 🔥 required how much magnetic field 😂😂😂😂😂
Fascinating stuff, though I wonder how long it will take for technology like this to come to market(and at what cost).
Thank you
I had an idea. A Cobalt-Gadolinium alloy can be tuned to have desired curie temperature even below 10 Celsius. I watched a video on force buoyancy by Action Lab using magnetic fields (Osmium on ferrofluid when subjected to a magnetic field).
My idea would be a system that used a combination of magnetic fields and a thermoacoustic generator (for liquefaction of granular material and creating temperature differences) to reduce the buoyancy of the material below the Curie temperature and separate particles based on temperature.
A system based on this may benefit by incorporating the magneto caloric effect but it would not be necessary. As with just about any idea there are issues. Price of materials, is it more effective then currently used techniques etc.
When these systems will be available for customers? What will be the price in comparison to conventional refrigerator?
We are currently still in earlier stages of trial and optimization of these systems, so it is not yet possible to estimate when they will be available for customers and how much they will cost. Stay tuned for further updates!
But you will have to mine stuff like this & that takes heavy equipment run by diesel engines.
But is it more energy efficient?
The technology certainly has the potential to outrun current compressor based systems in terms of efficiency. But precise predictions cannot be made yet, since the technology is still in the early stages of development.
Facinating but using rare earth materials that polute the world more on extraction is a double edged sword :-(
Excellent point! This is exactly the problem with wind turbines, electric vehicles, and catalytic converters. The amount of energy and pollution required to mine, purify, and ship these heavy rare earth metals is monumental. All of this almost never gets figured into the efficacy of the technology i mentioned
What is the diffence in temperature between the heat sink and the refrigerator?
Dear Sebastian, thank you for your interest! We have built several systems based on this approach, resulting in temperature differences between heat sink and source between 2 K and 8 K. Currently, we are working on further increasing this temperature difference.
Are miniature versions available for small electronics? How they compare to peltier coolers?
Miniature versions are currently not available, because we are still in the early stages of development. As to your second question: the advantage of magnetocalorics compared to thermoelectric is its potentially larger energy efficiency. Hope that helps!
@@FraunhoferIPM So they are even more efficient than traditional refrigeration technologies like Stirling cooling? I'd want try to use something for camera cooling to increase signal/noise ratio.
@@RynaxAlien Indeed, magnetocaloric cooling has the potential to show larger efficiencies than other state-of-the-art cooling technologies. The challenge is to get the very good material performance into a working system. Up until today, the best published efficiency values are about 60% of Carnot.
@@FraunhoferIPM Do you think they can replace compressor based fridges and air conditioning (heating in winter, cooling in summer) within 20 years?
@@knorkeize At the current stage, we cannot make precise predictions for the future; a lot of questions still have to be answered. We are moving forward one step at a time. At the moment we are conducting a study with manufacturers and users of the technology in order to address some of the open questions.
Are there job opportunities for Fraunhofer based in the United States and/or remotely? I am based in Chicago. Thanks in advance for any info.
Thanks for your interest! Fraunhofer IPM is one of the Fraunhofer institutes and is based in Germany - however, the Fraunhofer Gesellschaft also has establishments in the US. For further info, please have a look at the Fraunhofer Homepage: www.fraunhofer.de/en/institutes/international/north-southamerica/fraunhofer-usa.html.
It may be more dangerous than cooling by changing the phase of the material, as it is a magnetic effect on the metal where the magnetic field messes with the metal particles and makes them radiate! Or absorb, unlike the current cooling system that depends on phase change, it is Similar to what happens in nature.
Hello, I am currently doing researches on magnetic refrigiration where could I join Fraunhofer IPM Freiburg ?
Hello, if you are referring to open positions at Fraunhofer IPM, these are available at: www.ipm.fraunhofer.de/en/jobs-career.html. For general interest in our research you can always contact our Thermal Energy Converters Department: www.ipm.fraunhofer.de/en/bu/energy-converters-thermal.html. Hope this helps!
wanna join hands ??
Are you hiring?
For current job openings, please have a look at our career page: www.ipm.fraunhofer.de/en/jobs-career.html.
Magnetic fields provide heat🔥 forever? ¿????
Since two 2⃣✌magnets are stick to each other and it will produced heat 🔥at long time⌚
🤣🤣🤣🤣🤣🤣
So how much heat 🔥 required how much magnetic field 😂😂😂😂😂