Magnetocaloric properties of spheroidal La(Fe,Mn,Si)13Hy granules and their performance in epoxy-bonded active magnetic regenerators
| Autor: | Vittorio Basso, Deise Schafer, Jader R. Barbosa, Marcelo Augusto Rosa, Hugo Vieyra, Michaela Kuepferling, Cristiani C. Plá Cid, Bernardo P. Vieira, Jaime Lozano, Henrique Neves Bez |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Pressure drop
Materials science 020209 energy Energy Engineering and Power Technology Refrigeration 02 engineering and technology Epoxy Cooling capacity Industrial and Manufacturing Engineering 020401 chemical engineering visual_art Regenerative heat exchanger 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Magnetic refrigeration Degradation (geology) 0204 chemical engineering Composite material Porosity |
| Zdroj: | Applied Thermal Engineering. 183:116185 |
| ISSN: | 1359-4311 |
| Popis: | Magnetic cooling has been researched as an alternative near room-temperature refrigeration technology for the past two decades. However, one of its greatest limitations is the lack of materials which can be properly shaped for optimal thermal-hydraulic performance while maintaining a substantial magnetocaloric effect at moderate fields (i.e., between 1 and 2 T) and remaining mechanically (and chemically) stable. In this paper, we thoroughly characterized a commercially accessible La(Fe,Mn,Si)13H y material (available as spheroidal granules), in terms of its magnetocaloric properties and thermal-hydraulic performance in an Active Magnetic Regenerator (AMR) device. The regenerator bed built from epoxy-bonded spheroidal particles endured dozens of hours of operation in AMR cycles without any noticeable degradation of their mechanical integrity, thanks to a comparatively larger α − Fe content and granule porosity. As for the magnetic cooling performance, the AMR reached zero-span specific cooling capacities as high as 300 W kg−1. A 1-D two-temperature approach AMR model predicted the performance data with average deviations smaller than 7% for the zero-span specific cooling capacity and 5% for the AMR pressure drop. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect