Energy Savings Potential in Using Cold-shelves Innovation for Multi-deck Open Front Refrigerated Cabinets

Tsamos, Konstantinos M.; Mroue, Hassan; Sun, Junjie; Tassou, Savvas A.; Nicholls, Nobby; Smith, G.

doi:10.1016/j.egypro.2019.02.094

Cited by 12 publications

(5 citation statements)

References 5 publications

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“…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.…”

Section: Introductionmentioning

confidence: 99%

“…The SVM algorithm developed was trained to optimize the design parameters with minimum cooling loss. Tsamos et al (2019) used air guiding strips and cold shelves to achieve low ambient air infiltration and the correct temperature of test products with less energy consumption. Hammond et al (2011) introduced a design guide which would enable cabinet designers with limited fluid flow expertise to rapidly identify the most efficient air curtain design to seal any given cavity from fundamental measurements without any need for intensive computation.…”

Section: Introductionmentioning

confidence: 99%

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

Vengalis,

Mokshin

2023

J. eng. process. manag.

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<p>This paper presents experimental investigations of the efficiency of an open-type refrigerated display cabinet used to store food at temperatures between &ndash;1 and +7 &deg;C. The purpose of the study was to increase the efficiency of the open-type cabinet by improving its design. The cabinet has five shelves for food products with lengths of 350-600 mm. The spacing between the base and the first shelf is 280 mm, and between the other shelves it is 250 mm. The air enters the cabinet from the return air grille (RAG) at the bottom of the front panel, fans blow air through the evaporator, and the cooled air travels through a tunnel to the top of the refrigerator. The perforated distributor at the top distributes the cooled air, and part of the air is blown through the perforated back panel and the other part passes through the air-off honeycomb (dimensions (WH) are 12020 mm) at the front top of the cabinet, thus forming an air curtain between the inside of the refrigerator and the ambient warm air to protect the chilled food products. The cooled air entering through the perforated back panel into the display area helps maintain the required food temperature. In this study, two versions of the refrigerated cabinet were analyzed. The first version is the standard refrigeration cabinet and the second version is the same cabinet but with a change in the angle of inclination of the honeycomb and a reduction in the depth of the shelves. Air and test product temperatures were measured with thermocouples, and electrical energy consumption was measured with the Carel MT300W1100 energy meter. The experimental results show that the infiltration ratio decreases from 38.7 to 27.7%, and the 24-hour electrical consumption decreases from 24.91 to 19.22 kWh in the case of the modified cabinet. The average air temperature in the return air grille (RAG) decreased from 7.5 to 6.52 &deg;C with the same temperature settings. The average temperature of the M packages decreased by 0.2-2.2 &deg;C depending on the position in the refrigerator.</p>

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Vengalis,

Mokshin

2023

J. eng. process. manag.

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“…The authors of [5][6][7] experimentally and numerically investigated closed refrigerated display cabinets under various conditions: with/without doors and at various external air temperatures. However, although the doored display cabinets exhibited higher energy efficiency, open display cabinets are always preferred by the buyers, as open-type cabinets attract them and make it easier for them to reach the food products [8]. On the other hand, improvements can often be made to the design of display cabinets to improve air curtain performance.…”

Section: Introductionmentioning

confidence: 99%

“…The results of the CFD simulation showed that the air-guiding strips accelerated the air curtain vertically and the cooling capacity necessary to keep the food cooled was decreased by 34%. Tsamos et al [8] proposed using cold shelf innovation with guiding strips to improve the performance of vertical multi-deck refrigerated display cabinets. The results showed energy savings of 16.7 kWh/24 h compared to the conventional cabinet.…”

Section: Introductionmentioning

confidence: 99%

2D CFD Simulation of Dynamic Heat Transfer in an Open-Type Refrigerated Display Cabinet

Vengalis

Mokšin

2022

Applied Sciences

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This study uses a simplified two-dimensional time-dependent computational fluid dynamic (CFD) model to study the influence of wall shelf configuration and outtake honeycomb inclination angle on the performance of the air curtain in an open-type semi-vertical refrigerated display cabinet. Numerical simulation results show that changing the angle, along with changing the shelf configuration, can reduce the temperature of the intake air grille and improve the warm/cold air ratio. The average temperature of the simulated food products decreased by 1.2 °C compared to the unmodified display cabinet and began to meet the requirements of the temperature category 3M0. The proposed CFD model was validated by the experimental results. The simulation results obtained are important for cabinet design to improve product storage quality and reduce energy consumption.

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“…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).…”

Section: Analysis Of Studies On Thermal Flows In Refrigerating Unitsmentioning

confidence: 99%

Terminių srautų, vykstančių šaldymo įrenginiuose, tyrimai

Vengalis

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Vilniaus Gedimino technikos universiteto Mechanikos inžinerijos mokslo krypties disertacijos gynimo taryba: Pirmininkas prof. dr. Dalius MAŽEIKA (Vilniaus Gedimino technikos universitetas, Mechanikos inžinerija -T 009). Nariai: prof. dr. Artūras KILIKEVIČIUS (Vilniaus Gedimino technikos universitetas, Mechanikos inžinerija -T 009), dr. Dragan MARINKOVIC (Berlyno technikos universitetas, Vokietija, Mechanikos inžinerija -T 009), dr. Nerijus STRIŪGAS (Lietuvos energetikos institutas, Energetika ir termoinžinerija -T 006), prof. dr. Vytautas TURLA (Vilniaus Gedimino technikos universitetas, Mechanikos inžinerija -T 009). Disertacija bus ginama viešame Mechanikos inžinerijos mokslo krypties disertacijos gynimo tarybos posėdyje 2024 m. birželio 5 d. 10 val. Vilniaus Gedimino technikos universiteto SRA-I posėdžių salėje.

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Energy Savings Potential in Using Cold-shelves Innovation for Multi-deck Open Front Refrigerated Cabinets

Cited by 12 publications

References 5 publications

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

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

2D CFD Simulation of Dynamic Heat Transfer in an Open-Type Refrigerated Display Cabinet

Terminių srautų, vykstančių šaldymo įrenginiuose, tyrimai

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