Thermistor based system for grain aeration monitoring and control

Neto, Antônio José Steidle; Lopes, Daniela de Carvalho

doi:10.1016/j.compag.2015.06.004

Cited by 13 publications

(7 citation statements)

References 18 publications

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“…However, the application of the drying technique to correct the migration of moisture in the grains during storage, with either natural air or heated air, may also lead to changes in the physical quality and consequently nutritional quality of the grains 31 , 32 . Aeration aims to cool the mass of grains stored in the silos and may be operated continuously or intermittently until the mass of the grains reaches the desired temperature levels.…”

Section: Introductionmentioning

confidence: 99%

Influences of drying temperature and storage conditions for preserving the quality of maize postharvest on laboratory and field scales

Coradi

Maldaner

Lutz

et al. 2020

Sci Rep

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Drying and storage methods are fundamental for maintaining the grain quality until processing. Therefore, the aim of this study was to evaluate the associations of the drying temperature with storage systems and conditions as a strategy for preserving the quality of maize grain postharvest on laboratory and field scales. An increase in temperature accelerated the reduction in grain moisture, but increased the deterioration. The wetting during the storage period reduced the grain quality. Hermetic and aerated storage systems maintained the chemical quality of the grains. The control with healthy and whole corn dried at 80 °C and stored in silos with natural aeration provided a satisfactory quality, equivalent to those of controlled drying and storage under airtight conditions and at low temperatures. Different conditions of drying and storage of corn on the laboratory and field scales were evaluated, which provides an appropriate management of these operations to maintain the grain quality.

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Section: Introductionmentioning

confidence: 99%

Influences of drying temperature and storage conditions for preserving the quality of maize postharvest on laboratory and field scales

Coradi

Maldaner

Lutz

et al. 2020

Sci Rep

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“…The annual costs of depreciation and maintenance were each calculated at 10% of the capital investment [8,15,39] and adjusted according to the inflation rate. The energy costs were calculated based on the electrical power consumption of each scenario and Brazilian energy prices corrected for inflation.…”

Section: Economic Analysismentioning

confidence: 99%

“…However, ambient aeration systems are still dominant for temperature management of stored grains [6,14,15]. One possible limiting factor in the broad-scale adoption of chilled aeration is the general belief that this technology is economically unviable or much more expensive than other post-harvest methods [5].…”

Section: Introductionmentioning

confidence: 99%

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Economic and Technical Feasibility of Grain Chilling in Brazil

Neto¹

2021

J. Basic Appl. Sci.

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Grain quality is critical due to the more stringent food-safety demands. Chilled aeration has become a popular technology for preventing grain spoilage during storage, mainly in warmer regions. However, a limiting factor in broad-scale adoption of chilling is the general belief that this technology is much more expensive than other post-harvest methods, such as the aeration with ambient air. In this work, ambient and chilled aeration were simulated considering the three major grain-producing regions in Brazil. Also, three storage capacities (95, 5000, 10500 t), five-grain types (corn, coffee, rice, bean, soybean), and two storage periods (beginning at the first and the last months of the harvest period) were used in the study, totalling 180 simulation scenarios. Based on these simulations a comparative cash flow analysis was performed aiming at evaluating the influence of the product, storage period, region, and silo size on the costs and profits from using these technologies. Results were strongly affected by the weather patterns of the studied regions, market values of grain, storage sizes, and fan operation hours. Chilled aeration should be economically competitive with ambient aeration, and the two technologies appeared as low-risk investments in Brazil, achieving average profits for 20 years by considering the time of money of US$ 68 and 59.4 million, respectively. Considering the technical factors, chilling presented higher energy consumption, but showed a greater potential for reducing grain temperatures and resulted in grain dry matter losses around 58% smaller than those verified when using ambient air.

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“…Below 30% water, however, the amount of water is less available for evaporation. According to Soysal et al (2006); Steidle Neto and Lopes (2015) the air flow should be enough to overcome the losses of the load in order to exercise the grain drying process before the air reaches the humidity saturation. From this point on, the water migration from the interior to the surface of each grain, becomes the main factor affecting the drying rate.…”

Section: Grainsmentioning

confidence: 99%

Experimental prototype of silo-dryer-aerator of grains using Computational Fluid Dynamics (CFD) system

Coradi

Lemes

2019

Acta Sci. Technol.

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The aim of this study was to size up and evaluate a fixed bed experimental silo-dryer-aerator with four static grain drying cells for segregation lots, through simulations with mathematical equations and a computational fluid dynamics (CFD) system. The average specific energy consumption of the dryer was 2,998.56 kJ kg-1 of evaporated water. At the global scale, the amount of heat needed to complete a grain drying was 22,283.84 kcal (5,325.96 kJ kg-1) and the amount of heat required to complete the cooling of a stored grain mass was 3,525 kcal (842.49 kJ kg-1). The drying equipment responded positively to the dynamic aspects of air, distribution, flow, pressure, speed and heating. The results obtained allow us to conclude that the silo-dryer-aerator prototype was characterized as a viable and sustainable tool, making it possible to perform the drying and storage of grains in standardized and segregated lots, according to genetic characterization, minimizing quantitative and qualitative losses.

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Thermistor based system for grain aeration monitoring and control

Cited by 13 publications

References 18 publications

Influences of drying temperature and storage conditions for preserving the quality of maize postharvest on laboratory and field scales

Influences of drying temperature and storage conditions for preserving the quality of maize postharvest on laboratory and field scales

Economic and Technical Feasibility of Grain Chilling in Brazil

Experimental prototype of silo-dryer-aerator of grains using Computational Fluid Dynamics (CFD) system

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