Bøger af Diego José Araújo Bandeira

The environmental impacts caused during the storage process of agricultural products increases as production increases, some mechanisms have been developed to mitigate this. This study demonstrates the operational mechanisms of a soybean storage unit, examining the potential environmental (positive and negative) and socioeconomic effects in all post-harvest stages, from grain transportation to shipping, as well as mitigating measures. In addition to the certifications required for the installation of a storage unit.

Silos sind unverzichtbare Bauwerke für die Erhaltung der Qualität von landwirtschaftlichen Erzeugnissen, die von der Industrie, der Landwirtschaft und dem Mineraliensektor verwendet werden, wie z. B. Getreide, Saatgut und andere landwirtschaftliche Betriebsmittel. Die Bestimmung der physikalischen und mechanischen Eigenschaften der zu lagernden Güter ist für die korrekte Auslegung und Dimensionierung von Silos notwendig, da diese Eigenschaften die Art des Flusses sowie die Intensität und Verteilung der Spannungen in der Struktur beeinflussen. Daher sollte bei der Planung oder Änderung eines Be- und Entladesystems die Produktcharakterisierung einer der ersten Schritte sein.dieses Material behandelt einen Leitfaden für die Dimensionierung eines Getreidelagers mit allen notwendigen Berechnungen.

Les silos sont des structures essentielles au maintien de la qualité des produits agricoles utilisés par les secteurs industriel, agricole et minéral, tels que les céréales, les semences et autres intrants agricoles. La détermination des caractéristiques physiques et mécaniques des marchandises à stocker est nécessaire pour une conception et un dimensionnement corrects des silos, car ces caractéristiques influent sur le type de flux, ainsi que sur l'intensité et la répartition des contraintes dans la structure. Par conséquent, lors de la planification ou de la modification d'un système de chargement et de déchargement, la caractérisation du produit doit être l'une des premières étapes.Ce matériel traite d'un guide pour le dimensionnement d'une unité de stockage de céréales, avec tous les calculs nécessaires.

Silos are essential structures for maintaining the quality of agricultural products used by the industrial, agricultural and mineral sectors, such as grains, seeds and other agricultural inputs. The determination of the physical and mechanical characteristics of the goods to be stored is necessary for the correct silo design and dimensioning, because these characteristics affect the type of flow, as well as the intensity and distribution of stresses in the structure. Therefore, when planning or changing a loading and unloading system, product characterization should be one of the first steps.This material is a guide for sizing a grain storage unit, with all the necessary calculations.

I silos sono strutture essenziali per mantenere la qualità dei prodotti agricoli utilizzati dai settori industriale, agricolo e minerario, come cereali, sementi e altri input agricoli. La determinazione delle caratteristiche fisiche e meccaniche delle merci da immagazzinare è necessaria per una corretta progettazione e dimensionamento del silo, poiché tali caratteristiche influenzano il tipo di flusso, nonché l'intensità e la distribuzione delle sollecitazioni nella struttura. Pertanto, quando si progetta o si modifica un sistema di carico e scarico, la caratterizzazione del prodotto dovrebbe essere uno dei primi passi. Questo materiale tratta una guida per il dimensionamento di un'unità di stoccaggio di cereali, con tutti i calcoli necessari.

Vertical silos are structures intended for the storage of powdery or granular, bulk products. During unloading some problems may occur, such as cohesive arch formation and rathole. Inserts are instruments used to minimize flow problems in vertical silos. The main objective of this research was the numerical and experimental analysis of the mass flow rate and the unloading velocity of the stored product. The software ANSYS 15.0, based on the Finite Volume Method (FVM), was used. It was observed the influence of the inserts in the solution of flow problems, being that the insert 2 in the second height analyzed, promoted the best results for the improvement of the flow pattern of the stored product. Regarding the numerical model, all simulations performed presented average error values lower than 15%, thus concluding that the proposed model was consistent with the experimental model.