The substitution process of heavy fuel oil with natural gas in the industrial sector of Valle del Cauca and Cauca – Colombia 2004-2012 by Rangel Jiménez, Andrés Eduardo, Portilla Salazar, Carlos Johnny

Subjects: “…Alternative energy sources…”

Thermal transfer analysis of tubes with extended surface with fractal design by Llano Sánchez, Luis Eduardo, Domínguez Cajeli, Darío Manuel, Ruiz Cárdenas, Luis Carlos

Subjects: “…Alternate energy sources…”