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Impact of hysteresis on caloric cooling performance
ID
Masche, M.
(
Avtor
),
ID
Ianniciello, Lucia
(
Avtor
),
ID
Tušek, Jaka
(
Avtor
),
ID
Engelbrecht, Kurt
(
Avtor
)
PDF - Predstavitvena datoteka,
prenos
(1,90 MB)
MD5: 4CD67984A0E52F58A724DF1685BC0875
URL - Izvorni URL, za dostop obiščite
https://www.sciencedirect.com/science/article/pii/S0140700720304229?via%3Dihub#!
Galerija slik
Izvleček
Caloric cooling relies on reversible temperature changes in solids driven by an externally applied field, such as a magnetic field, electric field, uniaxial stress or hydrostatic pressure. Materials exhibiting such a solid-state caloric effect may provide the basis for an alternative to conventional vapor compression technologies. First-order phase transition materials are promising caloric materials, as they yield large reported adiabatic temperature changes compared to second-order phase transition materials, but exhibit hysteresis behavior that leads to possible degradation in the cooling performance. This work quantifies numerically the impact of hysteresis on the performance of a cooling cycle using different modeled caloric materials and a regenerator with a fixed geometry. A previously developed 1D active regenerator model has been used with an additional hysteresis term to predict how modeled materials with a range of realistic hysteresis values affect the cooling performance. The performance is quantified in terms of cooling power, coefficient of performance (COP), and second-law efficiency for a range of operating conditions. The model shows that hysteresis reduces efficiency, with COP falling by up to 50% as the hysteresis entropy generation (qhys) increases from 0.5% to 1%. At higher working frequencies, the cooling performance decreases further due to increased internal heating of the material. Regenerator beds using materials with lower specific heat and higher isothermal entropy change are less affected by hysteresis. Low specific heat materials show positive COP and cooling power up to 2% of qhys whereas high specific heat materials cannot tolerate more than 0.04% of qhys.
Jezik:
Angleški jezik
Ključne besede:
hysteresis
,
caloric effect
,
numerical modeling
,
regenerator
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. 302-312
Številčenje:
Vol. 121
PID:
20.500.12556/RUL-122206
UDK:
519.8:539.98(045)
ISSN pri članku:
0140-7007
DOI:
10.1016/j.ijrefrig.2020.10.012
COBISS.SI-ID:
39776771
Datum objave v RUL:
27.11.2020
Število ogledov:
1273
Število prenosov:
362
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
International journal of refrigeration
Skrajšan naslov:
Int. j. refrig.
Založnik:
Elsevier Science
ISSN:
0140-7007
COBISS.SI-ID:
9140997
Sekundarni jezik
Jezik:
Slovenski jezik
Naslov:
Impact de l'hystérésis sur les performances de refroidissement calorique
Ključne besede:
histereze
,
kalorični učinek
,
numerično modeliranje
,
regenerator
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.:
Independent Research Fund Denmark
Številka projekta:
8022-00277B
Naslov:
Maximizing the lifetime of elastocaloric systems through compression operation
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
J2-9253
Naslov:
Multikalorično hlajenje
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