Mechatronics Engineering Department, Faculty of Engineering at the Central Library organized a seminar under the title "Energy Performance in Low-Carbon Buildings" on Monday, 11/19/2012, The speaker Dr.Essam E.Khalil, Professor of Mechanical Power Engineering, Faculty of Engineering, Cairo University, Chair of Arab code of cooling and air-conditioning and Regional Head (Middle East and Africa) of the Organization of ASHRE and Fellow ASME and Fellow AIAA. He addressed the importance of energy conservation in buildings and ways to take advantage of renewable energy sources and demonstrate some of the projects models and buildings that depends entirely on clean energies.