Models to predict the thermal state of rice stored in aerated vertical silos

Khatchatourian, Oleg; Binelo, Manuel Osório; Neutzling, Ricardo; Faoro, Vanessa

doi:10.1016/j.biosystemseng.2017.06.013

Cited by 15 publications

(9 citation statements)

References 26 publications

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“…In the simulation of model studied in the paper published by Khatchatourian, Binelo, Neutzling and Faoro [4], the authors evaluated the four models analyzed and proposed, for future studies, experiments for the validation of models in other types of silos and for other grain varieties.…”

Section: Results Of Studied Modelsmentioning

confidence: 99%

“…The explanation for M , T a , T p and T g can be found in [6], they are determined through other differential equations. In reference [4], the authors adopted four models, two of them related to partial differential equations and the other two related to a recursive method, which will be dealt with in the following subsection.…”

Section: Models Using Differential Equationsmentioning

confidence: 99%

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A Survey on Heat Transfer in the Aerated Drying Process of Stored Grains

Petravicius¹,

Moraes²,

Souza³

et al. 2020

Proceeding Series of the Brazilian Society of Computational and Applied Mathematics

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The purpose of this review is to investigate and analyze recent publications on experimental studies on mathematical models that evaluate, or suggest that such a method can be evaluated, the drying process of stored grains by aeration and how the heat transfer occurs in this process. The emphasis for this paper is on the observation of types of grains ordinarily usually used in the experimental studies, on the mathematical techniques that define the models and on the efficiency observed for these studied models. Finally, it is expected to present a paper with a synthesis consistent with the current reality that might direct subsequent research on the area of heat transfer on stored grains drying by aeration.

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Section: Results Of Studied Modelsmentioning

confidence: 99%

Section: Models Using Differential Equationsmentioning

confidence: 99%

A Survey on Heat Transfer in the Aerated Drying Process of Stored Grains

Petravicius¹,

Moraes²,

Souza³

et al. 2020

Proceeding Series of the Brazilian Society of Computational and Applied Mathematics

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show abstract

“…If inlet air is pretreated, automatic control of the heating, refrigeration or humidifying will need to be realized. Real-time data acquisition is also essential in real bins [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Control and Real-Time Data Acquisition of an Experimental Platform for Stored Grain Aeration Study

Liu

2021

Sensors

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Aeration is one of the most important methods to keep stored grain safe and maintain its quality. Experimental platforms are used for stored grain aeration study in a laboratory-scale. The purpose of this paper was to provide the real-time data acquisition and control system design of a new experimental platform with multifunction for stored grain study. Requirements of the aeration experiments were analyzed, and multi running modes were designed. The aeration inlet air conditions were designed to be adjustable and multi variables need to be controlled simultaneously, which was a key problem to be solved for the platform. An ON/OFF-PID based multivariable cooperative control method was proposed, and two control loops were formed where inlet air temperature and humidity were considered separately while could be controlled simultaneously with a logic judgement strategy. Real-time data needed to be monitored was acquired with different sensors and displayed intuitively. Experiments were carried out to test the static and dynamic characteristics of the control method and three inlet air flow rates of 0.03, 0.08 and 0.13 m·s−1were used. Performance of the data acquisition system was also tested. The results showed that, the inlet air conditions control error was within ±1 °C and 10% for temperature and relative humidity, respectively. The real-time data acquisition of multi parameters during aeration process was realized. The experimental platform can be used for studies of different aeration objectives.

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“…The importance of storage has grown significantly as a result of the increase in volumes traded and the rise in worldwide food demand. Aeration in silos is commonly used to improve the storability of grains, because forced ventilation helps to keep uniform temperatures throughout the silo, and contributes to avoiding moisture migration and removing the odours of the stored grain masses, and can also be used to apply fumigation (Khatchatourian & Savicki, 2004;Khatchatourian et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Prediction of pressure drop through packed beds of granular materials: influence of moisture reduction and air velocity

Altino

Ferreira

2019

Braz. J. Food Technol.

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The influence of the moisture content of the solids on the pressure drop through packed beds of soy, barley, lentils and oats was investigated. The properties of the grains and the packed beds were determined varying the moisture contents of the solids between the equilibrium moisture content and 0.24 g g-1 (mass of water per mass of dry solid). The pressure drops were measured as a function of the aeration velocity under different moisture contents of the solids. It was observed that a reduction in the moisture content caused a decrease in the particle dimensions but did not affect their shape. Due to the reduction in size caused by the moisture removal, the packed beds become denser and less permeable to the airflow, resulting in an increase in the pressure drop. In the moisture range investigated, the pressure drops increased by more than 39% for lentils, soy and barley, and by about 24% for oats, indicating that the energy consumption during aeration could rise significantly. The parameters of the Forchheimer’s equation were modified to take into account the influence of the moisture content of the solids on the pressure drops. For each particle, empirical equations were proposed and shown to be adequate to accurately predict the pressure drop of the packed beds as a function of the moisture content and aeration velocity.

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Models to predict the thermal state of rice stored in aerated vertical silos

Cited by 15 publications

References 26 publications

A Survey on Heat Transfer in the Aerated Drying Process of Stored Grains

A Survey on Heat Transfer in the Aerated Drying Process of Stored Grains

Control and Real-Time Data Acquisition of an Experimental Platform for Stored Grain Aeration Study

Prediction of pressure drop through packed beds of granular materials: influence of moisture reduction and air velocity

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