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Numerical Simulation of Frost Formation on a Plate-Fin Evaporator

: Afrasiabian, E.; Iliev, O.; Lazzari, S.; Isetti, C.


2018, Paper ICMFHT 125, 9 S.
World Congress on Momentum, Heat and Mass Transfer (MHMT) <3, 2018, Budapest>
Fraunhofer ITWM ()

In the present paper, the Eulerian-granular model is adopted, to predict the frost growth on one channel of a plate-fin evaporator. A proper mass transfer model and modified frosting criteria are used to simulate the frost formation process. First, the model is validated with experimental data obtained under various operating conditions. The numerical predictions for the frost thickness and density are in good agreement with available experimental data. Furthermore, a parametric analysis is carried out to study the impact of the geometrical parameters of a three-dimensional plate-fin evaporator. A qualitative comparison shows a good agreement between the numerical data and experimental observations reported in the literature. One interesting outcome emerging from this study is that the distance between refrigerant tubes can play an important role in the frosting time.