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

Teme: “...Alternative energy sources...”

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

Teme: “...Alternate energy sources...”