Methodology for Enhancement of Energy Efficiency in Hydraulic Equipment Sergio Luiz Pereira, Guilherme F. Fa. Sortino, Eduardo Mário Dias and Maria Lídia Rebello Pinho Dias MATEC Web Conf., 214 (2018) 04002 Published online: 15 October 2018 DOI: 10.1051/matecconf/201821404002