Entropy Generation Minimization Analysis of Active Magnetic Regenerators

TREVIZOLI, PAULO V.; BARBOSA, JADER R.

doi:10.1590/0001-3765201720160427

PAULO V. TREVIZOLI

POLO - Laboratórios de Pesquisa em Refrigeração e Termofísica, Departamento de Engenharia Mecânica, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil

JADER R. BARBOSA JRCorrespondence to: Jader R Barbosa Jr E-mail: jrb@polo.ufsc.br

POLO - Laboratórios de Pesquisa em Refrigeração e Termofísica, Departamento de Engenharia Mecânica, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, SC, Brazil

Correspondence to: Jader R Barbosa Jr E-mail: jrb@polo.ufsc.br

Contribution to the centenary of the Brazilian Academy of Sciences.

PEC	$D_{h, R e g}$ [mm]	$ζ$	Housing volume [cm $3$ ]	$d_{p}$ [mm]
VG	12.5 - 50	16 - 0.25	24.544	0.3 - 2
FA	25	1 - 8	12.272 - 98.175	0.3 - 2

$\dot{m}$	$d_{p}$	$D_{h, R e g}$	$ζ$	$N_{D, t o t a l}$	$ϕ$	$N T U$	${\dot{S}}_{g, m i n}$
[kg/h]	[mm]	[mm]	[-]	[-]	[-]	[-]	[W/K]
40	1.07	18.217	5.169	0.412	0.505	17.3	0.00414
50	1.2	19.030	4.535	0.408	0.631	11.0	0.00580
60	1.18	19.966	3.926	0.404	0.757	9.5	0.00741
70	1.1	21.000	3.375	0.399	0.884	9.4	0.00897
80	0.99	22.120	2.887	0.393	1.010	10.1	0.01046
90	0.86	23.426	2.431	0.385	1.136	11.9	0.01183
100	0.71	25.167	1.960	0.375	1.262	15.7	0.01298

$f$	$d_{p}$	$D_{h, R e g}$	$ζ$	$N_{D, t o t a l}$	$ϕ$	$N T U$	${\dot{S}}_{g, m i n}$
Hz	[mm]	[mm]	[-]	[-] ]	[-]	[-]	[W/K]
1	1.18	19.966	3.926	0.404	0.757	9.5	0.00741
1.5	1.35	19.096	4.488	0.408	0.505	7.3	0.00824
2	1.39	19.043	4.525	0.408	0.379	6.9	0.00892
2.5	1.39	18.962	4.584	0.409	0.303	6.9	0.00958
3	1.38	18.923	4.612	0.409	0.253	7.0	0.01017
3.5	1.36	18.810	4.696	0.409	0.216	7.2	0.01082
4	1.33	18.752	4.739	0.409	0.189	7.5	0.01152

$\dot{m}$	$D_{i}$	$D_{e}$	$L_{m a g}$	Volume
[kg/h]	[mm]	[mm]	[mm]	[cm $3$ ]
40	18.2	53.2	94.2	233.7
50	19.0	55.6	86.3	233.8
60	20.0	58.3	78.4	233.7
70	21.0	61.3	70.9	233.8
80	22.1	64.6	63.9	233.7
90	23.4	68.4	57.0	233.8
100	25.1	73.5	49.8	233.4

$\dot{m}$	$d_{p}$	$D_{h, R e g}$	$ζ$	$N_{D, t o t a l}$	$ϕ$	$N T U$	${\dot{S}}_{g, m i n}$
[kg/h]	[mm]	[mm]	[-]	[-]	[-]	[-]	[W/K]
50	0.33	25.0	1.005	0.334	1.256	72.8	0.00477
75	0.3	25.0	1.311	0.352	1.445	76.7	0.00788
100	0.38	25.0	1.737	0.368	1.453	47.3	0.01173
125	0.49	25.0	2.195	0.381	1.438	28.9	0.01635
150	0.63	25.0	2.704	0.390	1.401	18.0	0.02171
175	0.82	25.0	3.326	0.398	1.328	11.23	0.02768
200	1.07	25.0	4.129	0.405	1.223	7.181	0.03433

$f$	$d_{p}$	$D_{h, R e g}$	$ζ$	$N_{D, t o t a l}$	$ϕ$	$N T U$	${\dot{S}}_{g, m i n}$
Hz	[mm]	[mm]	[-]	[-]	[-]	[-]	[W/K]
1	1.07	25	4.129	0.405	1.223	7.2	0.03433
1.5	0.86	25	2.788	0.391	1.207	7.5	0.03461
2	0.69	25	2.044	0.377	1.235	8.5	0.03500
2.5	0.62	25	1.658	0.366	1.219	8.6	0.03540
3	0.52	25	1.335	0.353	1.261	9.8	0.03588
3.5	0.51	25	1.185	0.345	1.217	9.0	0.03623
4	0.5	25	1.070	0.338	1.180	8.5	0.03664

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Brasil

Entropy Generation Minimization Analysis of Active Magnetic Regenerators

Abstract