Magnetics Business & Technology - November/December 2022 - 17

RESEARCH & DEVELOPMENT
VAC Developing Microchannel Regenerators for Magnetocaloric Cooling
Advancing from recent research success, Vacuumschmelze
is moving toward series production
to apply its magnetocaloric materials to produce
microchannel regenerators. They can enable magnetocaloric
cooling systems in buoyancy, capable
of shifting from hot to cold and vice versa with
improved efficiency.
VAC has been developing the environmentally
friendly materials for magnetocaloric cooling in
collaboration with the Fraunhofer IPM Institute and
other partners starting back in 2017. The aim of
the MagMed project has been to bring sustainable
and energy-efficient cooling to series production.
The Fraunhofer IPM Institute has now achieved
a breakthrough in terms of increasing the performance
of magnetocaloric cooling systems. The
project was recently covered in Magnetics Magazine.
Magnetocaloric
cooling systems do not require
environmentally harmful or explosive refrigerants
such as CFCs (chlorofluorocarbons) or butane.
They are energy efficient and quiet, making them
the first choice when it comes to replacing conventional
compressor technology in the future. In laboratory
experiments, it has now been possible to
demonstrate a power density of 12.5 W per gram
of material used -- a previously unattained value.
The supply of the magnetocaloric material in the
form of microchannel regenerators (MCR), which
VAC is now developing towards series production
readiness, plays an essential role. Contrary to
previous manufacturing processes, the MCRs are
produced using a foil casting process. This allows
cost-effective, reliable production on an industrial
scale. The different alloy variants of its product
Calorivac enable application over a wide temperature
range.
" We are proud to contribute to the revolution in
refrigeration technology with the Calorivac MCRs, "
says Alexander Barcza, Head of Product Management
Permanent Magnets Special Tasks. " We
are excited to see the results the demonstrator
refrigerator built by our project partners will deliver.
After all, we would like to present a magnetocaloric
refrigerator for the 100th anniversary of VAC in
2023. " For more info, see www.vacuumschmelze.
com.
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November/December 2022 * Magnetics Business & Technology 17

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Magnetics Business & Technology - November/December 2022

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