20.500.12556/RUL-124220 Analytical modeling and numerical simulation of heat transfer in a skin evaporator Modélisation analytique et simulation numérique du transfert de chaleur dans un évaporateur à surface 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. skin evaporator heat transfer household refrigerator analytical modelling numerical simulation transfert de chaleur réfrigérateur domestique modélisation analytique évaporateur à surface simulation numérique true false true Angleški jezik Francoski jezik Članek v reviji 2021-01-08 06:54:41 2021-01-08 06:54:46 2022-09-04 03:58:28 0000-00-00 00:00:00 2018 0 0 cevno-ploščni uparjalnik, prenos toplote, gospodinjski hladilnik, analitično modeliranje, numerična simulacija Str. 195-203 Vol. 88 2018 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 62-714:004.94(045) 0140-7007 10.1016/j.ijrefrig.2018.01.012 15891227 9140997 RAZ_Lorbek_Luka_2018.pdf RAZ_Lorbek_Luka_2018.pdf 1 EEE72378A534F83593537E6CFD036B99 40b08b5e90eab5d83c0d8c8613e1ee90d9da0082424e480925e8093d919977d1 82524dc6-a1bb-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=139632 https://www.sciencedirect.com/science/article/pii/S0140700718300318 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=139631 Fakulteta za strojništvo 0 0 0