Dr. Abdel Rahman Elbakheit
King Saud University
Saudi Arabia
Abstract Title: Building Integrated Diffusers' Area Ratio Optimization
Biography:
Dr. Elbakheit is an associate Professor at the Dept. of Architecture and Building Science, King Saud University, Riyadh, Saudi Arabia. He is also a registered consultant in sustainable Architectural design majoring Photovoltaic and wind turbine integration into buildings. Obtained his doctorate degree at the University of Nottingham, UK 2007. The research topic was ' Enhanced Architectural integration of Photovoltaic and wind turbines into building Design'. It aimed at utilizing the architectural design forms to create favorable conditions for integration of photovoltaic and wind turbines to maximize their performance as well as the architectural environment. In 2002, he graduated with a first class (Distinction) MSc. In Renewable energy and Architecture from Nottingham University, UK. BSc. 1994 in Architecture. In addition, he has produced numerous publications in international refereed journals, (Clarivate Analytics) listed journals and scientific conferences revolving about solar and wind technologies and integration into buildings, Tall buildings sustainable design, Including natural lighting, energy efficiency, passive systems, and other sustainability issues.
Research Interest:
This paper presents an investigation into the effect of area ratio parameter of diffusers on its energy output through power coefficient Cp. This parameter has effect both on diffusers’ energy yield, besides diffuser's size for architectural integration prospects. A systematic increase in diffusers area ratio is adopted following standardized diffuser profile presented by NACA 1244 aerofoil. A series of area ratios were investigated (i.e., 1.25, 1.5, 1.75, 2, 2.5, 3 and 3.5). Area ratio of 1.5 (i.e., outlet/inlet, 0.75 m/0.50 m) exhibited the highest power coefficient Cp of 4.2, in addition to achieving highest resulting velocity of 25.8 m/s under incident velocity of 16m/s. Considerable wind separation inside inner walls of diffusers occurred from area ratio 1.75 onwards, which impacted resulting velocities. Simulations performed with ANSYS CFD Academic to standalone diffusers. A series of incident velocities employed from 1 to 16 m/s that resulted in velocity increase by 120–156% respectively.
Keywords: Diffuser area ratio, Wind energy augmentation, Building integrated diffusers, Diffuser sizing, Wind energy optimization in buildings, Diffuser optimization