Análisis del proceso de torrefacción para la obtención de un grano de café pretostado
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Authors
Solano, J.
Vargas Elías, Guillermo Asdrúbal
Mora Chaves, Juan Roberto
Miranda Chavarría, José Alberto
Barrantes Montoya, Sergio Ignacio
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Abstract
El proceso está dirigido a cafés de alta calidad (gourmet) como los microlotes de cafés diferenciados, así que un café especial puede presentar una alternativa para beber café recién tostado. El objetivo fue analizar el proceso de torrefacción para la obtención de un café pretostado. Se ajusto un modelo matemático para representar el perfil térmico del tostador durante el pretueste y después de una semana en reposo se tostaron completamente. Se usó un tostador convencional de gas a 280°C con masas de 600g de café, un sistema de adquisición de datos de temperatura con sensores tipo K con registro de temperatura cada 20 s. El modelo matemático permitió representar el perfil de temperaturas del tostador durante el pretueste y el tueste final, los coeficientes de determinación fueron mayores a 98 %. La producción de café pretostado se puede predecir y efectivamente disminuye el tiempo del tueste final de los granos de café.
The process is aimed at high-quality (gourmet) coffees such as micro-lots of differentiated coffees, so a specialty coffee can present an alternative to drinking freshly roasted coffee. The objective was to analyze the roasting process to obtain a pre-roasted coffee. Two mathematical models were fitted to represent the thermal profile of the roaster during pre-roasting and after one week standing, they were completely roasted. A conventional gas roaster was used at 280 ° C with 600g coffee masses, a temperature data acquisition system with K-type sensors with temperature recording every 20 s. The two mathematical models allowed to represent the temperature profile of the roaster during the pre-roast and the final roast, the coefficients of determination were greater than 99%. The production of pre-roasted coffee can be predicted and effectively decreases the final roast time of the coffee beans.
The process is aimed at high-quality (gourmet) coffees such as micro-lots of differentiated coffees, so a specialty coffee can present an alternative to drinking freshly roasted coffee. The objective was to analyze the roasting process to obtain a pre-roasted coffee. Two mathematical models were fitted to represent the thermal profile of the roaster during pre-roasting and after one week standing, they were completely roasted. A conventional gas roaster was used at 280 ° C with 600g coffee masses, a temperature data acquisition system with K-type sensors with temperature recording every 20 s. The two mathematical models allowed to represent the temperature profile of the roaster during the pre-roast and the final roast, the coefficients of determination were greater than 99%. The production of pre-roasted coffee can be predicted and effectively decreases the final roast time of the coffee beans.
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Keywords
Torrefacción, Pretueste, Coffea arabica, Roasting, Pre-roast, CAFÉ