Experimental and numerical study of frost formation with natural convection in a triangular arrangement of slender vertical tubes

Improving the Thermal Efficiency and Performance of Refrigeration Systems: Numerical-Experimental Analysis of Minimization of Frost Formation

“…In the case of grooved samples, it can be seen that in the behaviors presented there is no rationality or logic regarding possible influences caused by basic materials or environmental parameters used, with no possibility for predictions, as seen on the brass base material, in which the thickness of the porous ice layer is shown greater up to 80 min when compared to the smooth and varnished samples. The numerical data obtained in this study were validated, based on the numerical models proposed by Sedano [16] and Maldonado et al [1], through the experimental data collected during the tests. Fig.…”

“…The formation of porous ice is a physical phenomenon that occurs when the flow of the mixture formed by air and water vapor comes into contact with surfaces that have temperatures below 0°C. Examples of applications where this phenomenon occurs are aircraft wings, refrigeration system evaporators, compressor rotors, cryogenic liquid transfer and storage, and many others [1]. The equipment used in the most diverse types of refrigeration segments, whether commercial or industrial, works with evaporation temperatures close to −10°C, favoring the generation and accumulation of porous ice (frost) on the surface of the devices used in the process of cooling [2].…”