A Magnetocaloric Booster Unit for Energy-Efficient Air-Conditioning

Abstract

A concept for the application of a magnetocaloric device in energy-efficient air conditioners is introduced. In order to evaluate this concept, a test stand has been developed equipped with a magnetic field source providing about a 1.5-T flux density change into which different regenerator geometries can be implemented and evaluated. A processing route for the production of profiled magnetocaloric LaFeSiMn-based composite plates by tape casting is presented. The processed plates show a maximum isothermal entropy change of about 3.8 J kg - 1 K - 1 at a magnetic field change of 1.5 T at 285 K. The hydraulic and thermal performance of regenerator geometries that can be realized by profiled plates is assessed by calculations.

How to build the optimal magnet assembly for magnetocaloric cooling: Structural optimization with isogeometric analysis

“…14(c)), yielding a smooth transition of the AMR into the magnetization zone when the system rotates. Increasing the distance to the AMR at the magnet edges has also been shown to increase the magnetic flux density in other assemblies (Krautz et al, 2019).…”

A Study of Temperature-Dependent Hysteresis Curves for a Magnetocaloric Composite Based on La(Fe, Mn, Si)13-H Type Alloys

“…These include gadolinium-based compounds, in particular, the paradigm material Gd 5 Si 2 Ge 2, La(Fe, Mn, Co, Mn) 13−x Si x (H,N,C) y intermetallics, Laves phases, MnAs 1−x Sb x magnetocalorics, ferromagnetic lanthanum manganites and Heusler alloys. Lanthanium-based compounds are relatively cheap and are composed of abundant materials, thus they are at present the subject of intensive research [38,39]. In this paper we study the magnetic response of samples composed of sintered La(FeMnSi) 13 -H x alloy.…”

Energy Applications of Magnetocaloric Materials

“…In the latter case, the cooling power improved the operation of the Stirling cycle by 28.5%. Another rotary magnetic refrigerator was recently developed by Krautz et al as an air conditioning system, capable of generating magnetic flux densities of >1.4 T. It consisted of an inner rotor with eight iron teeth, a stator with four‐pole permanent magnets, and an outer iron yoke. The magnetocaloric material chambers were placed in the stator.…”