Dr. Ali Sayigh is Chairman and Founder of the World Renewable Energy Congress and Council; Director General of World Renewable Energy Network (WREN); Chairman and Founder of the Arab Solar Energy Society and Past Chairman of the UK Solar Energy Society. Dr. Sayigh was recently elected to chair the Iraqi Energy Institute, and he actively consults on renewable and sustainable energy issues for a number of international organizations, including UNESCO, ISESCO, UNDP, ESCWA, & UNIDO. Dr. Sayigh was Director of Solar Seminars at ICTP- Trieste, Italy from 1977-1995; Professor of Solar Energy at King Saud, Kuwait and Reading Universities from 1969 to 1994 and Professor of Engineering at the University of Hertfordshire, from 1994 to 2004. He was the founding expert in Renewable Energy at AOPEC. He is Fellow of the Institute of Energy; Fellow of the Institution of Electrical Engineers and Chartered Engineer. He has published more than 400 papers and has contributed to and edited more than 30 books. He is Editor and Editor in Chief of several international journals including Renewable Energy and the International Journal of Environmental Sciences and Technology and Editor-in-Chief of the Major Reference Work, Comprehensive Renewable Energy.

• Introduction.- The History of Baudgeers.- The Architecture of Baudgeers.- An Analytical – Numerical Study of the Performance of Conventional Wind Towers.- An Analytical – Numerical Study of the Performance of New Designs of Wind towers.- Performance Evaluation of New Designs of Baudgeers Compared to the Conventional Ones.- Designing, Constructing and Testing Conventional Baudgeers and New Designs.- Conclusions and Recommendations.- Pictures of Baudgeers.