EIT RAW MATERIALS SUMMIT 2019
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The Future of Waste NdFeB Rare Earth Permanent Magnets and their Role in a Circular Economy
Gas-vapour compression technology for refrigeration, heating, ventilation, and air-conditioning has remained unchallenged for more than 120 years. Energy spent for domestic cooling is expected to outreach that for heating worldwide over the course of the twenty-first century. There is a huge demand for a smart alternative - magnetic refrigeration.
Magnetic materials are key components in energy technologies, robotics, sensors and information technology. Magnets are inseparable from our everyday life. “Green” energy technologies such as wind turbines, electro-mobility and solid state cooling, rely on high performance magnetic materials which have to be available in bulk quantities, at low-cost and with tailored magnetic hysteresis.
Gas-vapour compression technology for refrigeration, heating, ventilation, and air-conditioning has remained unchallenged for more than 120 years. Energy spent for domestic cooling is expected to outreach that for heating worldwide over the course of the twenty-first century. There is a huge demand for a smarter, more flexible and more efficient cooling technology. Magnetic refrigeration could be that alternative working without gas-based refrigerants.
The magnetocaloric effect (MCE) is the reversible temperature change of a magnetic material upon application and removal of a magnetic field. I will introduce the basics of the MCE, illustrate its great potential in magnetic refrigeration, will derive the required materials´ attributes of a magnetic heat exchanger, give guidelines for material selection and will look into the challenges of developing an efficicient prototype. I will address the criticality of strategic metals in magnetic cooling, their potential for substitution and how the ecological footprint of the magnetic fridge can be improved by using recycled magnets.
PS6 - Resource Efficiency Cities
Wed Feb 13 2019 16:32:34 GMT+0000 (Coordinated Universal Time)