CFD model of the airflow, heat and mass transfer in cool stores

Nahor, H.B.; Hoang, M.L; Verboven, Pieter; Baelmans, Martine; Nicolaı̈, Bart

doi:10.1016/j.ijrefrig.2004.08.014

Cited by 150 publications

(78 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two approaches can be applied to represent the fruit in the boxes. In the porous medium approach (Ambaw et al, , 2013bNahor et al, 2005;Verboven et al, 2006), the fruit are modelled in bulk in the boxes as a porous medium. This approach allows modelling large ensembles of boxes, for example an entire cool room or a refrigerated container, but it does not provide information on cooling heterogeneity among individual fruit within a single box.…”

Section: Numerical Modelmentioning

confidence: 99%

“…Modelling an entire container (with 20 pallets) is currently numerically too challenging if the individual fruit are modelled discretely. At this scale, however, the porous medium approach can be applied (Ambaw et al, , 2013bNahor et al, 2005;Verboven et al, 2006). Additional full-scale experiments, similar to the one of Defraeye et al , are underway to complement the simulation results, which will allow to determine realistic SECTs that include actual stacking patterns, operating conditions and gaps between pallets.…”

Section: Computational Modelling Of Container Coolingmentioning

confidence: 99%

See 1 more Smart Citation

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

View full text Add to dashboard Cite

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

show abstract

Section: Numerical Modelmentioning

confidence: 99%

Section: Computational Modelling Of Container Coolingmentioning

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

View full text Add to dashboard Cite

show abstract

“…CFD Model validated with measurements by using equation given below (Hoang et al 2000;Nahor et al 2005;Chourasia & Gosvami 2007a).…”

mentioning

confidence: 99%

Numerical modelling and experimental validation of a cold store ambient factors

BARTZANAS¹

2015

Tarım Bilimleri Dergisi

View full text Add to dashboard Cite

The objective of this study was to analyse air temperature and relative humidity distribution in an experimental cold store fully loaded with apples by using both experimental and numerical (CFD) methods. An unsteady three-dimensional computational fluid dynamics model was developed to assess the distribution of temperature and relative humidity in a cold store fully loaded with Granny Smith apples. The storage temperature and relative humidity were maintained at 2 °C and 90%, respectively. The relative humidity and temperature were measured at 36 different points inside the cold store in three different planes. A three-dimensional mathematical model was built for the numerical needs. The numerical model was validated against experimental data from the same facility. Relative error of the model was calculated 13% for temperature and 1.43% for relative humidity. Numerical results obtained from the simulations agreed quite well with experimental data for temperature and relative humidity. Maximum differences were observed near the borders of the cold store which can be attributed to the stronger thermal gradients taking place on these surfaces. A more homogeneous distribution was achieved in the middle of the cold store both for air temperature and relative humidity leading to even smaller errors between measurements and simulations.

show abstract

“…For analysis purposes, extensive distributed parameter systems were proposed in [15,16,66,109,110], which were analyzed by computational fluid dynamics (CFD) simulations. Experimental validation studies were done in [15,66,109,110]. In [102] a review of different CFD modelling approaches is given.…”

Section: Bulk Storage Roommentioning

confidence: 99%

“…There is extensive literature available on the modelling aspects of bulk storage rooms, see for example [58,66,102,103,109,110]. The main goal in these papers is to gain insight in the dynamics of temperature, humidity, and product quality.…”

Section: Introductionmentioning

confidence: 99%

Modelling and control of systems with flow

Mourik¹

View full text Add to dashboard Cite

CFD model of the airflow, heat and mass transfer in cool stores

Cited by 150 publications

References 13 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

Numerical modelling and experimental validation of a cold store ambient factors

Modelling and control of systems with flow

Contact Info

Product

Resources

About