1. a Laboratory of Heat Transfer and Environmental Engineering, Department of Mechanical Engineering , Aristotle University of Thessaloniki , 54124 , Thessaloniki , Greece Phone: Fax:
2. b Department of Food Technology , Technological Educational Institute of Thessaloniki , 57400 , Thessaloniki , Greece
3. c Laboratory of Environmental Friendly Technology, Department of Research and Development , Institute of Environmental Technology and Sustainable Development , 5309 , Paralimni , Cyprus