1. Group of Efficient Management of Energy- Gimel, Engineering Faculty; Universidad de Antioquia; Calle 67 No. 53-108 Medellín Colombia
2. Thermal Engines and Renewable Energies Group, School of Engineering; University of Valladolid; E-47011 Valladolid Spain
3. CIDAUT Foundation for Research and Development in Transport and Energy; E-47151 Boecillo Spain