Modelado de las isotermas de desorción y calor isosterico de sorción en granos de café pergamino húmedo (Coffee arabica L.)
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El secado es una de las operaciones imprescindibles para garantizar la estabilidad y calidad de los granos de café pergamino. El objetivo del presente trabajo fue modelizar las isotermas de desorción de los granos de café pergamino húmedo mediante un prototipo de secado convectivo a escala de laboratorio y la estimación del requerimiento de energía del proceso. Los datos experimentales fueron modelizados con tres expresiones empíricas que vinculan la dependencia del contenido de humedad de equilibrio y la actividad de agua con la temperatura. El calor isosterico neto de sorción fue estimado mediante la ecuación de Clausius-Clapeyron. El modelo de Iglesias y Chirife logro representar satisfactoriamente el efecto de la temperatura en las isotermas de los granos de café pergamino húmedo; presento un coeficiente de determinación ajustado mayor a 0.97 y un error cuadrático medio menor a 0.1 kg kg−1, base seca, indicando buen ajuste para fines prácticos. El calor isosterico neto de sorción disminuyo con incrementos del contenido de humedad indicando el gasto energético neto del proceso de secado.
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https://www.researchgate.net/publication/289327720_Drying_kinetics_of_natural_coffee_for_different_temperatures_and_low_relative_humidity
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