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The aim of this work was to estimate the mass transfer coefficient and to validate a dynamic non-linear model for a solar wood and biomass dryer. For this purpose, a solar dryer greenhouse was built to dry sawn wood and biomass, with approximately 1m3 of capacity. In the solar dryer, were dried boards of Eucalyptus spp.. For dynamic modeling, a dynamic balance around the solid material was proposed, taking into account the kinetic loss of the drying rate, which depends on the mass transfer coefficient, a parameter that will be adjusted taking into account the dynamics of the drying environment. in optimization, the nonlinear least squares method was used. As a result, it was possible to develop a dynamic model for the loss of moisture in relation to time in solar drying, as well as the mass transfer coefficient. It is possible to conclude that the mass transfer coefficient and the models found can be used to estimate drying parameters in other environmental conditions, such as: another time of the year, another city or even in another country, thus improving the prospects for the use of solar drying in rural areas.

ESTIMATIVA DO COEFICIENTE DE TRANSFERÊNCIA DE MASSA E VALIDAÇÃO DE UM MODELO DINÂMICO NÃO LINEAR PARA UM SECADOR SOLAR