1. Chemical Process & Energy Resources Institute; Centre for Research & Technology Hellas; P.O. Box 60361 GR-57001 Thessaloniki Greece
2. Department of Mechanical Engineering; University of Western Macedonia; Bakola & Salvera Str. 50100 Kozani Greece
3. Laboratory of Heat Transfer and Environmental Engineering; Department of Mechanical Engineering; Aristotle University; Thessaloniki, P.O. Box 483 54124 Thessaloniki Greece
4. Aristotle University of Thessaloniki; Department of Chemical Engineering; School of Engineering; P.O. Box 455 54124 Thessaloniki Greece