Novel design of a high efficiency multi-bed active magnetic regenerator heat pump

DallʹOlio, Stefano (avtor), Masche, M. (avtor), Liang, Jierong (avtor), Insinga, A. R. (avtor), Eriksen, Dan (avtor), Bjørk, Rasmus (avtor), Nielsen, Kaspar K. (avtor), Barcza, Alexander (avtor), Vieyra, Hugo (avtor), Beek, Niels V. (avtor), Neves Bez, Henrique (avtor), Engelbrecht, Kurt (avtor), Bahl, Christian Robert Haffenden (avtor)

The design of a rotary active magnetic regenerator heat pump device with a multi-bed concept is presented. Important design features are the rotating two-pole magnet assembly, the laminated iron ring, the 13 fixed tapered regenerator beds, and the dynamically adjustable parallel flow circuit. The optimized magnet design was developed with optimally shaped segments and optimum remanence for the desired magnetic field distribution oscillating between 0 and 1.44 T in the air gap. The iron ring was laminated to reduce the eddy currents, allowing the device to run at cycle frequencies up to 3 Hz. The design of the regenerator housing was optimized with respect to parasitic losses and even flow distribution in both directions. Employing 3.4 kg of La(Fe,Mn,Si)13Hy (CALORIVAC HS) refrigerant and at a hot reservoir temperature of 295 K and a cycle frequency of 0.5 Hz, the heat pump achieved a maximum second-law efficiency of 20.6 %, while providing a heating load of 340 W with a heating COP of 6.7 at a 10.3 K span. The COP values presented only consider the magnetic power and ideal pump power delivered to the AMR, neglecting the pump efficiency. At 1.2 Hz, the device produced a maximum heating power of 950 W while maintaining a 5.6 K span, resulting in a heating coefficient of performance and second-law efficiency of 7.0 and 11.6 %, respectively. The performance demonstrated in this paper could be an important milestone in the development of future magnetocaloric devices.

• Jezik: Angleški jezik
• Ključne besede: magnetic refrigeration, magnetocaloric effect, heat pumps, active magnetic regenerators
• 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: Str. 243-254
• Številčenje: Vol. 132
• PID: 20.500.12556/RUL-134664
• UDK: 621.57
• ISSN pri članku: 0140-7007
• DOI: 10.1016/j.ijrefrig.2021.09.007
• COBISS.SI-ID: 94222595
• Datum objave v RUL: 25.01.2022

Gradivo je del revije

• Naslov: International journal of refrigeration
• Skrajšan naslov: Int. j. refrig.
• Založnik: Elsevier Science
• ISSN: 0140-7007
• COBISS.SI-ID: 9140997

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: 11.09.2021
• Vezano na: Available online

Sekundarni jezik

• Jezik: Slovenski jezik
• Naslov: Nouvelle conception d’une pompe à chaleur à régénérateur magnétique actif à lits multiples et à haut rendement
• Ključne besede: magnetno hlajenje, magneto-kalorični učinek, toplotne črpalke, aktivni magnetni regeneratorji

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