Experimental and numerical study of heat transfer and flow characteristics with different placement of the multi-deck display cabinet in supermarket

Abstract

This work focuses on the heat transfer and flow characteristics with the different placement of the multi-deck display cabinet and tries to optimize the placement position of refrigerated display cabinet. First, the temperature distribution in a refrigerated display cabinet was experimentally investigated. The result showed that the food temperature in front is 3.6–4.8°C higher than back row of the same layer, and temperature fluctuation of 0.3–0.7°C less than the back row. Then, a three-dimensional numerical model of the display cabinet was established, and the k–ε model is employed to compare and analyze the heat transfer and air curtain characteristics. The results show that the placement methods have great influence on the performance of the display cabinet. The face-to-back placement method can acquire a better food refrigeration performance, and the food temperature of the face-to-back placement method is 0.3–0.5°C lower than that of the face-to-face placement method.

Experimental study of the performance of open–type refrigerated display cabinet

“…Many researchers have conducted numerical and exper-imental investigations to improve the efficiency of opentype refrigerators. Although many studies have been conducted on the performance of refrigerated cabinets (Amin, Dabiri, & Navaz 2009;Cao, Han, & Gu 2011;Fricke & Becker 2010;Hammond, Quarini, & Foster 2011;Tsamos et al 2019;Yuan et al 2021), most of them only emphasize a few aspects by performing experiments or computational fluid dynamics (CFD) software simulations. As a result, few studies have presented systemic strategies for performance optimization by investigating the relationship between multiple parameters.…”

“…A Coriolis mass flow meter was used to measure the refrigerant mass flow rate, electrical energy consumption was measured using kilowatt meters, the temperature was measured by thermocouples, and the relative humidity was measured with a humidity sensor. Yuan et al (2021) compared different placements of multi-deck display cabinets in a supermarket to understand the influence of the environment. The results show that the face-to-back placement method exhibits better food refrigeration performance, and the food temperature is 0.3-0.5 • C lower than that of the face-to-face placement method.…”

Terminių srautų, vykstančių šaldymo įrenginiuose, tyrimai

“…The RANS k-ε turbulent model is commonly found in scientific works, as it is often applied to save computational resources and time (Alzuwaid et al, 2016;Dagaro et al, 2006;Du et al, 2020;Foster et al, 2004;He et al, 2022;Li et al, 2022;Marrineti et al, 2014;Moureh et al, 2016;Nascimento et al, 2019;Orlandi et al, 2013;Rai et al, 2018;Sun et al, 2017;Tsamos et al,. 2019;Wang et al, 2015;Wang et al, 2021;Wu et al, 2014;Yuan et al, 2021;Zhou et al, 2021). RANS, which stands for Reynolds-Averaged Navier-Stokes, is commonly used to save computational resources and calculation time, as it averages the Navier-Stokes and Reynolds equations over time.…”