Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1507832 | Cryogenics | 2012 | 10 Pages |
Governing equations for the thermodynamics of an active magnetic regenerator (AMR) are used to analyze the performance of simplified cycles operating with idealized magnetocaloric material. An idealized material with a magnetocaloric effect that varies linearly with temperature is assumed. Results are presented for cases where balance and symmetry are equal to one (β=σ=1β=σ=1) and the refrigerant specific heat is constant. Under these conditions, the temperature distribution, cooling power, work rate, and efficiency are determined for various values of entrained fluid thermal mass (R). A set of sample results are presented for each case as a function of utilization, temperature span, and conductance. Results from the simplified thermodynamic theory are briefly compared to experimental results from the literature.
► Simplified relations for cooling power, work and efficiency of AMR cycles are derived. ► The performance potential of an idealized magentocaloric material is quantified. ► The impacts of parasitic thermal mass from entrained pore fluid are shown. ► The impacts of adiabatic temperature change and magnetic entropy change are discussed. ► Results are compared to reported experimental data.