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Room Temperature Magnetic Refrigeration [pdf]

2 points by unfasten 13y ago

unfasten 13y ago
Room Temperature Magnetic Refrigeration [pdf] http://www.ameslab.gov/files/MagFridge_Foundation.pdf http://www.ameslab.gov/files/MagFridge_Foundation.pdf A friend and I stumbled on to this last night. I've never heard about this effect before and thought it was interesting. From the PDF: While Gschneidner and Pecharsky’s prototype was a landmark event in the field of magnetic refrigeration, it would likely remain nothing more than a curiosity were it not for the fact that the team’s device is more energy efficient and environmentally friendly than virtually any conventional refrigerator on the market today. Because the relatively inexpensive permanent magnet handles the cooling without the need for additional energy input, electricity is only needed to turn the wheel and circulate the streams of water. For its part, water, even when combined with an environmentally friendly antifreeze, is more benign than the chemical coolants presently in use. And from one of the researchers last year, found at the bottom of https://www.external.ameslab.gov/news/inquiry/2012-2-karl-gschneidner https://www.external.ameslab.gov/news/inquiry/2012-2-karl-gs... Gschneidner was instrumental in development of refrigerators that harnessed this phenomenon in place of traditional gas-compression-driven cooling. "The biggest stumbling block we now face is coming up with a GMCE material that doesn't progressively break down into smaller pieces over the billions of magnetization/demagnetization cycles required for a 15-20-year appliance life," he says. "We also need to reduce the time dependence of the transformation." Based on the current pace of research and the growing number of working prototypes around the world, Gschneidner expects magnetic refrigeration to become commercially viable by 2016 or so, a fruition he plans to witness. More: https://en.wikipedia.org/wiki/Magnetic_refrigeration https://en.wikipedia.org/wiki/Magnetic_refrigeration

2 points by unfasten 13y ago

Room Temperature Magnetic Refrigeration [pdf] http://www.ameslab.gov/files/MagFridge_Foundation.pdf http://www.ameslab.gov/files/MagFridge_Foundation.pdf A friend and I stumbled on to this last night. I've never heard about this effect before and thought it was interesting. From the PDF: While Gschneidner and Pecharsky’s prototype was a landmark event in the field of magnetic refrigeration, it would likely remain nothing more than a curiosity were it not for the fact that the team’s device is more energy efficient and environmentally friendly than virtually any conventional refrigerator on the market today. Because the relatively inexpensive permanent magnet handles the cooling without the need for additional energy input, electricity is only needed to turn the wheel and circulate the streams of water. For its part, water, even when combined with an environmentally friendly antifreeze, is more benign than the chemical coolants presently in use. And from one of the researchers last year, found at the bottom of https://www.external.ameslab.gov/news/inquiry/2012-2-karl-gschneidner https://www.external.ameslab.gov/news/inquiry/2012-2-karl-gs... Gschneidner was instrumental in development of refrigerators that harnessed this phenomenon in place of traditional gas-compression-driven cooling. "The biggest stumbling block we now face is coming up with a GMCE material that doesn't progressively break down into smaller pieces over the billions of magnetization/demagnetization cycles required for a 15-20-year appliance life," he says. "We also need to reduce the time dependence of the transformation." Based on the current pace of research and the growing number of working prototypes around the world, Gschneidner expects magnetic refrigeration to become commercially viable by 2016 or so, a fruition he plans to witness. More: https://en.wikipedia.org/wiki/Magnetic_refrigeration https://en.wikipedia.org/wiki/Magnetic_refrigeration