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

Vengalis, Tadas; Mokšin, Vadim

doi:10.3390/app12146916

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…In this paper, an experimental study of energy efficiency and temperatures inside an open-type semivertical refrigerated cabinet is reported. This study con-tinues the previous research (Vengalis & Mokšin 2022) that developed and validated the Computational Fluid Dynamics (CFD) models of unmodified and modified refrigerated cabinets. This experimental study aims to compare the performance of open-type display cabinets with different honeycomb angles in terms of return air temperature and energy consumption.…”

Section: Introductionsupporting

confidence: 77%

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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: Introductionsupporting

confidence: 77%

“…The infiltration ratio shows how effectively the air curtain works in the open-type refrigerated cabinet. It was calculated according to the formula presented in (Vengalis & Mokšin 2022). For an unmodified cabinet, the infiltration ratio is 38.7% and in the case of the modified design, the infiltration ratio decreases to 27.7%.…”

Section: Resultsmentioning

confidence: 99%

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

Vengalis,

Mokshin

2023

J. eng. process. manag.

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Revealing flow structures in horizontal pipe and biomass combustor using computational fluid dynamics simulation

Steven,

Hernowo,

Sasongko

et al. 2024

Asia-Pacific J Chem Eng

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Computational fluid dynamics (CFD) is a powerful tool to provide information on detailed turbulent flow in unit processes. For that reason, this study intends to reveal the flow structures in the horizontal pipe and biomass combustor. The simulation was aided by ANSYS Fluent employing standard ‐ model. The results show that a greater Reynolds number generates more turbulence. The pressure drop inside the pipe is also found steeper for small pipe diameters following Fanning's correlation. The fully developed flow for the laminar regime is found in locations where the ratio of entrance length to pipe diameter complies with Hagen–Poiseuille's rule. The sucking phenomenon in jet flow is also similar to the working principle of ejector. For the biomass combustor, the average combustion temperature is 356–696°C, and the maximum flame temperature is 1587–1697°C. Subsequently, air initially flows through the burner area and then moves to the outlet when enters the combustor chamber. Not so for particle flow, the particle experiences sedimentation in the burner area and then falls as it enters the combustor chamber. This study also convinces that secondary air supply can produce more circulating effects in the combustor.

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Impact of condensate water recycling on the performance of open refrigerated display cabinet

Wang,

Zheng,

et al. 2024

Case Studies in Thermal Engineering

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

Cited by 4 publications

References 12 publications

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

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

Revealing flow structures in horizontal pipe and biomass combustor using computational fluid dynamics simulation

Impact of condensate water recycling on the performance of open refrigerated display cabinet

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