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Performance analysis of a high-efficiency multi-bed active magnetic regenerator device
ID
Masche, M.
(
Avtor
),
ID
Liang, Jierong
(
Avtor
),
ID
DallʹOlio, Stefano
(
Avtor
),
ID
Engelbrecht, Kurt
(
Avtor
),
ID
Bahl, Christian Robert Haffenden
(
Avtor
)
PDF - Predstavitvena datoteka,
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(5,43 MB)
MD5: D945629CC30DF9AE897E4284537A580A
URL - Izvorni URL, za dostop obiščite
https://www.sciencedirect.com/science/article/pii/S1359431121009984
Galerija slik
Izvleček
We present the performance of an active magnetic regenerator prototype with a multi-bed concept and parallel flow circuit. The prototype applies a two-pole permanent magnet (maximum magnetic flux density of 1.44 T) that rotates over 13 tapered regenerator beds mounted on a laminated iron yoke ring. Each bed is filled with about 262 g of spherical particles, distributed in layers of ten alloys of La(Fe,Mn,Si)13Hy (CALORIVAC HS) with different Curie temperatures. Other important features are the solenoid valves, the monitoring of the temperatures exiting each bed at the cold side, and a torque meter used to measure the magnetic power required to drive the cycle. The opening behavior of the solenoid valves (i.e., the blow fraction) could be adjusted to correct flow imbalances in each bed. The device provided a maximum cooling power of about 815 W at a cycle frequency of 1.2 Hz, a utilization of 0.36, and a hot reservoir temperature of 295 K while maintaining a 5.6 K-temperature span with a coefficient of performance of 6.0. In this case, the second-law efficiency was 11.6%. The maximum second-law efficiency of 20.5%, which represents one of the largest for a magnetocaloric device, was obtained at a cycle frequency of 0.5 Hz, a utilization of 0.34, and a hot reservoir temperature of 295 K at a temperature span of 10.3 K. Under these conditions, the device absorbed a cooling load of 288 W with a coefficient of performance of 5.7. It was also shown that an unbalanced flow due to different hydraulic resistance through the beds can cause cold side outlet temperature variations, which reduce the system performance, demonstrating the importance of a well-functioning, balanced flow system.
Jezik:
Angleški jezik
Ključne besede:
magnetocaloric effect
,
cooling performance
,
active magnetic regenerators
,
first-order phase transition
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FS - Fakulteta za strojništvo
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2021
Št. strani:
12 str.
Številčenje:
Vol. 199, art. 117569
PID:
20.500.12556/RUL-134663
UDK:
621.576
ISSN pri članku:
1359-4311
DOI:
10.1016/j.applthermaleng.2021.117569
COBISS.SI-ID:
94213635
Datum objave v RUL:
25.01.2022
Število ogledov:
734
Število prenosov:
155
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Applied thermal engineering
Skrajšan naslov:
Appl. therm. eng.
Založnik:
Elsevier Science
ISSN:
1359-4311
COBISS.SI-ID:
1861910
Licence
Licenca:
CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:
To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:
20.09.2021
Vezano na:
Available online
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
magnetno hlajenje
,
magnetni regeneratorji
,
magnetokalorično hlajenje
Projekti
Financer:
EC - European Commission
Program financ.:
H2020
Številka projekta:
814865
Naslov:
Renewables for clean energy buildings in a future power system
Akronim:
RES4BUILD
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
Innovation Fund Denmark
Številka projekta:
12-132673
Akronim:
ENOVHEAT
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