Improved energy efficiency in wineries using data from audits Raquel Vela, Fernando Ruiz Mazarrón, Joaquín Fuentes-Pila, Fátima Baptista, Luis Leopoldo Silva and José Luis García Ciência Téc. Vitiv., 32 1 (2017) 62-71 Published online: 09 August 2017 DOI: 10.1051/ctv/20173201062