[1] Univ Napoli Federico II, Dept Ind Engn, Piazzale Tecchio 80, I-80125 Naples, Italy
[2] ENEA Italian Natl Agcy New Technol Energy & Sustai, Piazzale Enrico Fermi 1, I-80055 Portici, Italy
[3] Univ Sannio, Dept Engn, Piazza Roma 21, I-82100 Benevento, Italy