Search

Based on experimental tests, it was obtained the equations for drying, equilibrium moisture content, latent heat of vaporization of water contained in the product and the equation of specific heat of cassava starch pellets, essential parameters for realizing modeling and mathematical simulation of mechanical drying of cassava starch for a new technique proposed, consisting of preformed by pelleting and subsequent artificial drying of starch pellets. Drying tests were conducted in an experimental chamber by varying the air temperature, relative humidity, air velocity and product load. The specific heat of starch was determined by differential scanning calorimetry. The generated equations were validated through regression analysis, finding an appropriate correlation of the data, which indicates that by using these equations, can accurately model and simulate the drying process of cassava starch pellets. Com base nos ensaios experimentais foram obtidas as equações de velocidade de secagem, conteúdo de umidade em equilíbrio, calor latente de vaporização da água contida no produto e a equação de calor especifico dos pellets de fécula de mandioca, parâmetros essenciais para realizar a modelagem e simulação matemática de secagem mecânica de amido de mandioca para uma nova técnica proposta, que consiste na pré-formação por peletização e subsequentes secagem artificial dos pellets amido. Foram realizados testes de secagem em uma câmara experimental, variando temperatura do ar, umidade relativa, velocidade do ar e carga do produto. O calor específico do amido foi determinado por calorimetria de varrimento diferencial. As equações geradas foram validadas por meio de análise de regressão, encontrando a adequada correlação de dados, o que indica que, utilizando tais equações podem ser modelados e simulados com precisão o processo de secagem de pellets de fécula de mandioca.

11 páginas Based on experimental tests, it was obtained the equations for drying, equilibrium moisture content, latent heat of vaporization of water contained in the product and the equation of specific heat of cassava starch pellets, essential parameters for realizing modeling and mathematical simulation of mechanical drying of cassava starch for a new technique proposed, consisting of preformed by pelleting and subsequent artificial drying of starch pellets. Drying tests were conducted in an experimental chamber by varying the air temperature, relative humidity, air velocity and product load. The specific heat of starch was determined by differential scanning calorimetry. The generated equations were validated through regression analysis, finding an appropriate correlation of the data, which indicates that by using these equations, can accurately model and simulate the drying process of cassava starch pellets.