TS-201.2 A magnetic refrigeration prototype operating with a rare-earth-free magnetic field source
Tuesday August 27, 2019 from 08:30 to 10:10
520cf
Presenter

Urban Tomc, Slovenia

Researcher, Teaching assistant

Faculty of mechanical engineering

University of Ljubljana

Abstract

A magnetic refrigeration prototype operating with a rare-earth-free magnetic field source

Urban Tomc1, Katja Klinar1, Simon Nosan1, Franc Majdič1, Joško Valentinčič1, Jure Mencinger2, Andrej Ljubenko2, Dejan Dren2, Andrej Kitanovski1.

1Faculty of mechanical engineering, University of Ljubljana, Ljubljana, Slovenia; 2Gorenje d.d., Velenje, Slovenia

This article presents a new magnetic refrigeration prototype that operates with a rare-earth-free magnetic field source. Its main novelty, in comparison to existing state-of-the-art magnetic prototypes, is the application of a static electromagnet assembly that can regenerate magnetic energy and enables a rapid alternation of the magnetic field, which is one of the crucial operating parameters that could lead towards the future miniaturization of magnetocaloric devices. The presented prototype consists of two electromagnetic assemblies, each containing a packed-bed active magnetic regenerator (AMR) that consists of 30 g of single-layered Gd magnetocaloric material (MCM) in the form of spheres. The prototype was experimentally tested for its performance in terms of temperature span and cooling power. For instance, operating with a single-layered Gd AMR at 4-Hz operating frequency, the prototype produced 114 Wkg-1 of specific cooling power (per MCM mass), while maintaining a temperature span of 5 K below ambient conditions.


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