A comprehensive parameter study of an active magnetic regenerator using a 2D numerical model

Kaspar Kirstein Nielsen, Christian Robert Haffenden Bahl, Anders Smith, Nini Pryds, Jesper Henri Hattel

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A two-dimensional numerical heat transfer model is used to investigate an active magnetic regenerator (AMR) based on parallel plates of magnetocaloric material. A large range of parameter variations are performed to study the optimal AMR. The parameters varied are the plate and channel thicknesses, cycle frequency and fluid movement. These are cast into the non-dimensional units utilization, porosity and number of transfer units (NTU). The cooling capacity vs. temperature span is mapped as a function of these parameters and each configuration is evaluated through the maximum temperature span and exergy. The results show that the optimal AMR should have a utilization in the range 0.2–1 and an NTU higher than 10 and not necessarily more than 30. It is concluded that parallel plate-based regenerators face significant challenges in terms of manufacturability. However, the benefit of parallel plate regenerators is a very low pressure drop, which is needed for high performance.
Original languageEnglish
JournalInternational Journal of Refrigeration
Volume33
Issue number4
Pages (from-to)753-764
ISSN0140-7007
DOIs
Publication statusPublished - 2010

Keywords

  • Magnetic refrigeration
  • Fuel Cells and hydrogen

Cite this

@article{97e50cfb08b54ff1a7f2b4047aa76b86,
title = "A comprehensive parameter study of an active magnetic regenerator using a 2D numerical model",
abstract = "A two-dimensional numerical heat transfer model is used to investigate an active magnetic regenerator (AMR) based on parallel plates of magnetocaloric material. A large range of parameter variations are performed to study the optimal AMR. The parameters varied are the plate and channel thicknesses, cycle frequency and fluid movement. These are cast into the non-dimensional units utilization, porosity and number of transfer units (NTU). The cooling capacity vs. temperature span is mapped as a function of these parameters and each configuration is evaluated through the maximum temperature span and exergy. The results show that the optimal AMR should have a utilization in the range 0.2–1 and an NTU higher than 10 and not necessarily more than 30. It is concluded that parallel plate-based regenerators face significant challenges in terms of manufacturability. However, the benefit of parallel plate regenerators is a very low pressure drop, which is needed for high performance.",
keywords = "Magnetic refrigeration, Fuel Cells and hydrogen, Magnetisk k{\o}ling, Br{\ae}ndselsceller og brint",
author = "Nielsen, {Kaspar Kirstein} and Bahl, {Christian Robert Haffenden} and Anders Smith and Nini Pryds and Hattel, {Jesper Henri}",
year = "2010",
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language = "English",
volume = "33",
pages = "753--764",
journal = "International Journal of Refrigeration",
issn = "0140-7007",
publisher = "Elsevier",
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A comprehensive parameter study of an active magnetic regenerator using a 2D numerical model. / Nielsen, Kaspar Kirstein; Bahl, Christian Robert Haffenden; Smith, Anders; Pryds, Nini; Hattel, Jesper Henri.

In: International Journal of Refrigeration, Vol. 33, No. 4, 2010, p. 753-764.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - A comprehensive parameter study of an active magnetic regenerator using a 2D numerical model

AU - Nielsen, Kaspar Kirstein

AU - Bahl, Christian Robert Haffenden

AU - Smith, Anders

AU - Pryds, Nini

AU - Hattel, Jesper Henri

PY - 2010

Y1 - 2010

N2 - A two-dimensional numerical heat transfer model is used to investigate an active magnetic regenerator (AMR) based on parallel plates of magnetocaloric material. A large range of parameter variations are performed to study the optimal AMR. The parameters varied are the plate and channel thicknesses, cycle frequency and fluid movement. These are cast into the non-dimensional units utilization, porosity and number of transfer units (NTU). The cooling capacity vs. temperature span is mapped as a function of these parameters and each configuration is evaluated through the maximum temperature span and exergy. The results show that the optimal AMR should have a utilization in the range 0.2–1 and an NTU higher than 10 and not necessarily more than 30. It is concluded that parallel plate-based regenerators face significant challenges in terms of manufacturability. However, the benefit of parallel plate regenerators is a very low pressure drop, which is needed for high performance.

AB - A two-dimensional numerical heat transfer model is used to investigate an active magnetic regenerator (AMR) based on parallel plates of magnetocaloric material. A large range of parameter variations are performed to study the optimal AMR. The parameters varied are the plate and channel thicknesses, cycle frequency and fluid movement. These are cast into the non-dimensional units utilization, porosity and number of transfer units (NTU). The cooling capacity vs. temperature span is mapped as a function of these parameters and each configuration is evaluated through the maximum temperature span and exergy. The results show that the optimal AMR should have a utilization in the range 0.2–1 and an NTU higher than 10 and not necessarily more than 30. It is concluded that parallel plate-based regenerators face significant challenges in terms of manufacturability. However, the benefit of parallel plate regenerators is a very low pressure drop, which is needed for high performance.

KW - Magnetic refrigeration

KW - Fuel Cells and hydrogen

KW - Magnetisk køling

KW - Brændselsceller og brint

U2 - 10.1016/j.ijrefrig.2009.12.024

DO - 10.1016/j.ijrefrig.2009.12.024

M3 - Journal article

VL - 33

SP - 753

EP - 764

JO - International Journal of Refrigeration

JF - International Journal of Refrigeration

SN - 0140-7007

IS - 4

ER -