Mathematical Modeling Procedures for Airflow, Heat and Mass Transfer During Forced Convection Cooling of Produce: A Review

Dehghannya, Jalal; Ngadi, Michael; Vigneault, Clément

doi:10.1007/s12393-010-9027-z

Cited by 94 publications

(55 citation statements)

References 71 publications

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“…To address these questions regarding produce cooling behaviour in refrigerated containers, computational fluid dynamics (CFD) is a more appropriate tool and nicely complements basic calculations and experiments. CFD has been applied extensively within a FAC context Dehghannya et al, 2012Dehghannya et al, , 2011Dehghannya et al, , 2010Delele et al, 2013aDelele et al, , 2013bFerrua and Singh, 2011, 2009a, 2009bSmale et al, 2006;Verboven et al, 2006;Zou et al, 2006aZou et al, , 2006b, but only to a very limited extent for cooling during transport (James et al, 2006;Moureh and Flick, 2004;Moureh et al, 2009Moureh et al, , 2002Tapsoba et al, 2007Tapsoba et al, , 2006, predominantly for refrigerated vehicles.…”

Section: Side Viewmentioning

confidence: 99%

Exploring ambient loading of citrus fruit into reefer containers for cooling during marine transport using computational fluid dynamics

Defraeye

Cronjé

Verboven

et al. 2015

Postharvest Biology and Technology

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Defraeye T., Cronjé P., Verboven P., Opara U.L., , Exploring ambient loading of citrus fruit into reefer containers for cooling during marine transport using computational fluid dynamics, Postharvest Biology and Technology 108, 91-101. AbstractA promising cold-chain protocol is explored as an alternative to the commonly-used forced-air pre-cooling (FAC) of citrus fruit prior to shipping: ambient loading of fruit in reefer containers for cooling during long-haul marine transport. Despite the multiple logistical and economical savings it provides, the potential of "ambient loading" of fruit in reefer containers has been left largely unexplored. The present study targets this aspect, but also cooling by vertical airflow in general. Computational fluid dynamics (CFD) is used to identify differences in cooling rate and uniformity between individual boxes at different heights on a pallet and between individual fruit within a single box. Simulations show that low airflow rates, typical for refrigerated containers, do not only induce slower fruit cooling, compared to FAC airflow rates, but also the cooling heterogeneity between different layers of boxes (in height) and between individual fruit in a single box is larger. In addition, the presence of gaps between pallets invokes airflow short-circuiting, leading to highly reduced fruit cooling rates. Finally, strategies for future improvement of the ambient loading protocol are proposed, which in the first place should target faster and more uniform cooling. Keywordscomputational fluid dynamics; package design; cold chain; airflow short-circuits; vent holes; convective transfer Defraeye T., Cronjé P., Verboven P., Opara U.L., , Exploring ambient loading of citrus fruit into reefer containers for cooling during marine transport using computational fluid dynamics, Postharvest Biology and Technology 108, 91-101.http://dx

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Section: Side Viewmentioning

confidence: 99%

Exploring ambient loading of citrus fruit into reefer containers for cooling during marine transport using computational fluid dynamics

Defraeye

Cronjé

Verboven

et al. 2015

Postharvest Biology and Technology

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“…Numerical models, on the other hand, can predict the air flow and temperature patterns at a high spatial and temporal resolution (Dehghannya et al, 2010;Smale et al, 2006). Due to its powerful visualization capabilities and acceptable accuracy of the predictions, computational fluid dynamics (CFD) is the primary method of choice (Ambaw et al, 2013a, Norton andSun Da-Wen, 2006;Smale et al, 2006;Verboven et al, 2006).…”

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confidence: 99%

Analysis of the spatiotemporal temperature fluctuations inside an apple cool store in response to energy use concerns

Ambaw

Bessemans

Gruyters

et al. 2016

International Journal of Refrigeration

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. 0Analysis of the spatiotemporal temperature fluctuations inside an apple cool store in response to energy use concerns Alemayehu Ambaw (a, c) , Niels Bessemans (a) , Willem Gruyters (a) , Sunny George Gwanpua (a) , Ann Schenk (b) , Ans De Roeck (b) , Mulugeta A. Delele (a) , Pieter Verboven (a) , Bart M. Nicolai  It has been demonstrated that fan and refrigeration cycling works to save energy. Load shifting of controlled atmosphere stores for saving energy costs seems worthwhile. AbstractEnergy cost concerns have led to question the temperature and air flow regimes in cool store facilities. In this paper, a CFD model of the air flow and temperature dynamics inside an apple fruit Page 1 of 33 1 cool store was developed, validated and used to analyse energy cost saving alternatives. Load shifting was attempted by cycling the temperature set point between 1.2 °C and 0.6 °C following a day/night regime. Discontinuous use of the cooling operation, including 12 h on / 12 h off; 10 h on / 14 h off; and 8 h on / 16 h off were also investigated. The study showed that the air circulation fan is the major source of heat load. Hence, an attempt to reduce energy cost should first deliberate on reducing the fan operation time. The study developed a generic tool to analyse temperature control options inside an apple cool store in response to energy use concerns.

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“…Pre-cooling is performed by one of the following ways: cold air in conventional storage chambers at relatively low speed (up to 1 m/s) and multiplicity of air exchange (30-40 volumes per hour); cold air in special chambers of intensive cooling at relatively high speeds of air motion (up to 3-4 m/s) and a large multiplicity of air exchange (60-120 or more volumes per hour); cold water (hydro-cooling); in the isothermal wagons or auto refrigerators [13].…”

Section: а K U L I Kmentioning

confidence: 99%

Substantiaton of selecting the method of pre-cooling of fruits

Serdyuk

Stepanenko

Baiberova

et al. 2016

EEJET

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Mathematical Modeling Procedures for Airflow, Heat and Mass Transfer During Forced Convection Cooling of Produce: A Review

Cited by 94 publications

References 71 publications

Exploring ambient loading of citrus fruit into reefer containers for cooling during marine transport using computational fluid dynamics

Exploring ambient loading of citrus fruit into reefer containers for cooling during marine transport using computational fluid dynamics

Analysis of the spatiotemporal temperature fluctuations inside an apple cool store in response to energy use concerns

Substantiaton of selecting the method of pre-cooling of fruits

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