MODELAGEM, SIMULAÇÃO E ANÁLISE DO FENÔMENO DE TRANSFERÊNCIA DE CALOR DO RESFRIADOR DE MOSTO DE UMA MICROCERVEJARIA EM SCILAB

Abstract

The present work sought to perform the modelling, simulation and heat transfer analysis of the plate heat exchanger of a microbrewery located in Universidade Estadual de Santa Cruz (UESC). For this purpose, the Scilab Software was used, making possible to program a diagram of the Effectiveness Method through the Xcos environment. The values obtained in this program were compared with experimental data during an English IPA beer batch production and those provided by the manufacturer. Moreover, the parameters Nusselt (Nu), Reynolds (Re), Prandtl (Pr), hydraulic diameter and convective heat transfer coefficient were calculated for the evaluation of the transport phenomena involved in the unit operation. The model proved to be adequate to generate heat exchanger simulations with significantly low relative errors (<8%) both in an ideal design operation and in situations encountered during the batch production of an artisanal beer. The data obtained concerning the fluid dynamics and heat transfer variables showed Nu = 0,139 , Re = 2,45, Pr = 0,123 and convective heat transfer coefficient (h) = 251,155 [W/(m².^oC)] for the mean temperature of the wort flow. This last one been close to a range of values usually fund for water in forced convection systems, pointing to conformity with theoretically expected results.