Experimental Validation of a Mathematical Model for the Batch Drying of Corn Grains

Martínez-Vera, Carlos; Vizearra-Mendoza, M.; Galin-Domingo, O.; Ruiz-Martínez, R.S.

doi:10.1080/07373939508916956

Cited by 10 publications

(4 citation statements)

References 5 publications

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“…Fig. shows the converted experimental points from the literature together with our results obtained from the experiments. The revised data by using modified Nu'‐Re equations exhibit a better fit compared to the original values.…”

Section: Resultsmentioning

confidence: 99%

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Volumetric Heat Transfer Coefficient in Fluidized‐Bed Dryers

Poós

Szabó

2018

Chem Eng & Technol

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In literature, there are several Nu=f(Re) equations to specify the heat transfer coefficient between solids and the drying gas, but these equations differ significantly because of the inaccuracy of determining the contact surface between the two phases. A pilot-plant fluidized-bed dryer is developed to study the heat and mass transfer phenomena during the drying process. A volumetric heat transfer coefficient is applied for modeling fluidized-bed dryers. A modified Nusselt number is defined to compare the experimental results and those of the literature. The modified Nu' =f(Re) equation exhibits a proper correlation between the results of the experiments in the literature and those of our experiments.

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Section: Resultsmentioning

confidence: 99%

“…The heat transfer coefficient can be calculated from dimensionless equations, which may be determined by experiments . The measured values can be verified using numerical simulation , and validated by experiments . Experimental studies with procedures and results provide novel application cases for experiment, science, and technology .…”

Section: Introductionmentioning

confidence: 99%

Volumetric Heat Transfer Coefficient in Fluidized‐Bed Dryers

Poós

Szabó

2018

Chem Eng & Technol

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“…In a single-phase model, the FB is considered as a single mass. Heat and mass balances are used for the FB, and the particles are assumed to be perfectly mixed (Martinez-Vera et al, 1995). On the other hand, multi-phase FB models comprise a bubble phase (dilute phase) and a suspension phase (dense phase).…”

Section: Fluidized Bed Modelingmentioning

confidence: 99%

Challenges and Opportunities Associated with Drying Rough Rice in Fluidized Bed Dryers: A Review

Luthra¹,

Sadaka²

2020

Transactions of the ASABE

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Highlights Fluidized bed drying of rice has several advantages that outweigh its disadvantages. Increasing the drying temperature above 60°C could reduce rice quality. Research related to energy and exergy efficiencies in fluidized bed dryers of rice is needed. Abstract. Rice (Oryza sativa L.) is a staple food for more than half the world’s population. World rice production reached approximately 740 million metric tons (MMT) in 2018 due to the ever-increasing demand driven by population and economic growth. Rice producers face challenges in meeting this demand, especially in developing countries where rice is prone to spoilage if the moisture content is not reduced to a safe level shortly after harvest. Rice producers, particularly in developing countries, typically use conventional drying methods, i.e., sun drying and natural air drying. These methods are time-consuming and environmentally dependent. On the other hand, fluidized bed drying, which is a well established technology, could provide rice producers with an effective drying technique that is quick, practical, affordable, and portable. Several innovative designs for fluidized bed dryers have been developed that could be installed on-farm or off-farm at a reasonable cost. Some studies have mentioned that the main advantage of fluidized bed drying is the increase in drying rate and the reduction of rice spoilage after harvest. Conversely, other studies have raised alarms regarding low rice quality, which is seen as a significant flaw of fluidized bed drying. Due to this lack of consensus, there is a great need to review this drying technology objectively. Therefore, this review article explores fluidized bed drying and details its advantages and disadvantages related to rice drying. It also sheds light on the effects of the operating parameters involved in fluidized bed drying, i.e., rice moisture content, drying temperature, airflow rate, air velocity, drying duration, and tempering duration, on dryer performance and rice quality. Several fluidized bed numerical models are also reviewed and evaluated. Additionally, this review explores the energy and exergy efficiencies of fluidized bed dryers and suggests opportunities for research associated with fluidized bed drying of rice. Keywords: Energy, Exergy, Fluidized bed drying, Fluidized bed modeling, Moisture content, Rice quality, Rough rice, Tempering.

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“…Registros experimentales de la temperatura y humedad del grano versus tiempo. Temperatura del aire alimentado:40,50,60 y 70°C respectivamente.…”

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Secado de amaranto: simulación y modelado en lechos fluidizados

Domínguez

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Experimental Validation of a Mathematical Model for the Batch Drying of Corn Grains

Cited by 10 publications

References 5 publications

Volumetric Heat Transfer Coefficient in Fluidized‐Bed Dryers

Volumetric Heat Transfer Coefficient in Fluidized‐Bed Dryers

Challenges and Opportunities Associated with Drying Rough Rice in Fluidized Bed Dryers: A Review

Secado de amaranto: simulación y modelado en lechos fluidizados

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