Journal article
Detailed numerical modeling of a linear parallel-plate Active Magnetic Regenerator
A numerical model simulating Active Magnetic Regeneration (AMR) is presented and compared to a selection of experiments. The model is an extension and re-implementation of a previous two-dimensional model. The new model is extended to 2.5D, meaning that parasitic thermal losses are included in the spatially not-resolved direction.
The implementation of the magnetocaloric effect (MCE) is made possible through a source term in the heat equation for the magnetocaloric material (MCM). This adds the possibility to model a continuously varying magnetic field. The adiabatic temperature change of the used gadolinium has been measured and is used as an alternative MCE than mean field modeling.
The results show that using the 2.5D formulation brings the model significantly closer to the experiment. Good agreement between the experimental results and the modeling was obtained when using the 2.5D formulation in combination with the measured adiabatic temperature change.
| Language: | English |
|---|---|
| Year: | 2009 |
| Pages: | 1478-1486 |
| ISSN: | 18792081 and 01407007 |
| Types: | Journal article |
| DOI: | 10.1016/j.ijrefrig.2009.03.003 |
| ORCIDs: | Nielsen, Kaspar Kirstein , Bahl, Christian Robert Haffenden , Smith, Anders , Bjørk, Rasmus , Pryds, Nini and Hattel, Jesper Henri |
Brændselsceller og brint Fuel Cells and hydrogen Heat Loss Magnetic field Magnetic refrigeration Magnetic refrigerator Magnetisk køling Modeling Simulation
ADI - Alternate Direction Implicit AMR - Active Magnetic Regeneration CHEX - Cold heat exchanger FEM - Finite Element Method Gd - Gadolinium HHEX - Hot heat exchanger MCE - Magnetocaloric effect MCM - Magnetocaloric material MFT - Mean field theory PDE - Partial Differential Equation TDMA - Tri-diagonal Matrix Algorithm
