Browsing by Author "Astudillo Castillo, Wladimir Alejandro"

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MODELADO DE CLIMA PARA FINES DE CONTROL, DE UN INVERNADERO.
(Universidad Técnica Federico Santa María, 2015) Astudillo Castillo, Wladimir Alejandro; Universidad Tecnica Federico Santa Maria UTFSM DEPARTAMENTO DE ELECTRONICA; SUAREZ SOTOMAYOR, ALEJANDRO; ERRAZ LEVAGGI, DANIEL ANDRES
In this paper, the development of a climate model inside a greenhouse, which includes the variables of temperature and relative humidity occurs. First, modeling alternatives are evaluated, with the physical model, the parameterized linear model and nonlinear parameterized model analyzed. Moreover, the constructive aspects of greenhouses in Chile are discussed and given their geometrical characteristics, construction materials and size, one is selected for modeling. The development of a physical model is made from a phenomenological perspective and using thermodynamics analysis tools a set of equations to determine the temperature and relative humidity inside the greenhouse is raised. Mechanisms of conduction, convection and radiation for determining the temperature are used. The ideal gas equation and their properties are used to determine the relative humidity behavior. A MATLAB code implementing dynamic climate inside the greenhouse, depending on the outdoor climate variables and generate graphs showing the temporal and spatial behavior of climate variables is also developed.