Experimental Analysis to Optimize the Performance of Air Curtains and Heat Exchangers

Abstract

This chapter reports an overview about experimental studies concerning the thermal performance of air curtains and heat exchangers installed in vertical open refrigerated display cases. The air curtain analysis shows the influence on the thermal performance by varying the width of the discharge air grille and the perforation density of the back panel by a mathematical model. The variation on the perforation density of the back panel and the width of discharge air grille alter significantly the thermal entrainment factor and the energy consumption of the equipment. Focusing the influence of environmental conditions on the performance of the heat exchanger, a second mathematical model was developed to evaluate the total heat load, its partial components and the condensate water mass. This analysis provides valuable information to the design of the air curtain and heat exchanger based on in-store environmental conditions and airflow efficiency.

Terminių srautų, vykstančių šaldymo įrenginiuose, tyrimai

“…When examining methods for turbulence assessment, three main modeling methods are encountered: Large Eddy Simulation (LES), Reynolds-Averaged Navier-Stokes (RANS) equation, and Menter's Shear-Stress Transport (SST) turbulent model. 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).…”