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Time-dependent model of temperature distribution in continuous flow pulsed electric field treatment chambers
ID
Lombergar, Peter
(
Avtor
),
ID
Flisar, Karel
(
Avtor
),
ID
Miklavčič, Damijan
(
Avtor
),
ID
Mahnič-Kalamiza, Samo
(
Avtor
)
PDF - Predstavitvena datoteka,
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(7,65 MB)
MD5: B369D4656E3ABFE0545BEC11FF216038
URL - Izvorni URL, za dostop obiščite
https://www.sciencedirect.com/science/article/pii/S1466856424000675
Galerija slik
Izvleček
A key component of a continuous flow pulsed electric field (PEF) system is the treatment chamber, where the product is exposed to electric pulses. Determination of the temperature distribution in the chamber during PEF treatment is important since high local increases in temperatures can affect the quality of the product. Coupled simulations of electric field, fluid flow, and heating in the existing literature do not model each individual electric pulse, but rather employ a “duty cycle” approach, which does not account for transient variations in treatment intensity and temperature changes in the medium. We present a time-dependent approach to modelling PEF treatment in continuous flow treatment chambers, which can model each pulse separately, and thus enables a more accurate study of temporal and spatial distributions of electric field and temperature. The model has been validated on laboratory scale treatment chambers of parallel plate or colinear design and using realistic protocols. Industrial relevance text: The paper is relevant to all pulsed electric field (PEF) applications either on laboratory or industrial scale that implement a continuous flow treatment chamber. It presents an improved modelling approach which allows for an analysis of the electrical current, electric field, and temperature distribution in the chamber during, at the end, and in between application of electrical pulses. The model can be used to predict the peak temperature at the end of each pulse in the hot spots, which if large enough could potentially lead to thermal damage of the product or in extreme cases even potential local boiling of the medium, resulting not only in degradation of the treated product, but also in accelerated electrode fouling, oxidation, and dissolution (etching), as well as arcing. This would not only affect the quality of the treated product but would also affect the wear and lifetime of electrodes/chambers, and of the pulse generator. The model can also be used to avoid expensive trial-and-error optimization of the PEF protocols and chamber geometries in situ.
Jezik:
Angleški jezik
Ključne besede:
pulsed electric fields
,
treatment chamber
,
continuous flow
,
numerical modelling
,
electroporation
,
ohmic heating
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FE - Fakulteta za elektrotehniko
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2024
Št. strani:
13 str.
Številčenje:
Vol. 93, art. 103628
PID:
20.500.12556/RUL-156122
UDK:
602.621
ISSN pri članku:
1466-8564
DOI:
10.1016/j.ifset.2024.103628
COBISS.SI-ID:
190865923
Datum objave v RUL:
09.05.2024
Število ogledov:
243
Število prenosov:
59
Metapodatki:
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Objavi na:
Gradivo je del revije
Naslov:
Innovative food science & emerging technologies
Založnik:
Elsevier, European Federation of Food Science and Technology
ISSN:
1466-8564
COBISS.SI-ID:
1221653
Licence
Licenca:
CC BY-NC-ND 4.0, Creative Commons Priznanje avtorstva-Nekomercialno-Brez predelav 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by-nc-nd/4.0/deed.sl
Opis:
Najbolj omejujoča licenca Creative Commons. Uporabniki lahko prenesejo in delijo delo v nekomercialne namene in ga ne smejo uporabiti za nobene druge namene.
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
pulzirajoča električna polja
,
pretočna komora
,
neprekinjen pretok
,
numerično modeliranje
,
elektroporacija
,
ohmsko segrevanje
Projekti
Financer:
ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:
P2-0249
Naslov:
Elektroporacija v biologiji, biotehnologiji in medicini
Financer:
ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:
Z7-1886
Naslov:
Razvoj naprednih modelov prenosa snovi in toplote v elektroporiranih rastlinskih tkivih pomembnih za industrijo predelave hrane
Financer:
ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:
I0-0022
Naslov:
Mreža raziskovalnih infrastrukturnih centrov Univerze v Ljubljani (MRIC UL)
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