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Analytical modeling and numerical simulation of heat transfer in a skin evaporator
Lorbek, Luka (Avtor), Poredoš, Primož (Avtor), Kitanovski, Andrej (Avtor), Poredoš, Alojz (Avtor)

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Izvleček
This paper presents a one-dimensional, steady-state, analytical and a two-dimensional, steady-state, numerical approach to describing heat transfer in the complex solid structure of a skin evaporator used in household refrigerators. Both models are based on a specific form of the energy equation (the heat diffusion equation), which is solved to obtain the temperature distributions and heat flows within the different parts of the structure. Heat transfer is limited by a number of thermal resistances, such as the inner plastic wall of the refrigerator, the aluminum plate, the foil, the tube of the evaporator, and the air gaps. The insulation that prevents heat flowing into the evaporator from the surroundings is also taken into consideration. A comparison of the models showed that the root-mean-square deviation of the calculated temperatures ranged from 0.34 K to 0.60 K and that the area-weighted discrepancy of the calculated heat flows was 4.6%. Experimental validation of the model showed that the calculated and measured evaporator capacities were within +/- 12%. This demonstrates that several simplifications to the analytical model can be made, so drastically reducing the complexity of modeling a skin evaporator's structure, while retaining sufficient accuracy. These simplifications include reducing the heat transfer to one-dimensional heat conduction in the individual parts of the structure, neglecting the heat flux through the aluminum-air-gap contact, and linearizing the aluminium foil.

Jezik:Angleški jezik
Ključne besede:skin evaporator, heat transfer, household refrigerator, analytical modelling, numerical simulation
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2018
Št. strani:Str. 195-203
Številčenje:Vol. 88
UDK:62-714:004.94(045)
ISSN pri članku:0140-7007
DOI:10.1016/j.ijrefrig.2018.01.012 Povezava se odpre v novem oknu
COBISS.SI-ID:15891227 Povezava se odpre v novem oknu
Opomba:cevno-ploščni uparjalnik, prenos toplote, gospodinjski hladilnik, analitično modeliranje, numerična simulacija
Število ogledov:128
Število prenosov:174
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Gradivo je del revije

Naslov:International journal of refrigeration
Skrajšan naslov:Int. j. refrig.
Založnik:Elsevier
ISSN:0140-7007
COBISS.SI-ID:9140997 Povezava se odpre v novem oknu

Gradivo je financirano iz projekta

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Program financ.:Mladi raziskovalci
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Sekundarni jezik

Jezik:Francoski jezik
Naslov:Modélisation analytique et simulation numérique du transfert de chaleur dans un évaporateur à surface
Ključne besede:transfert de chaleur, réfrigérateur domestique, modélisation analytique, évaporateur à surface, simulation numérique

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