Investigation of energy efficiency in the green buildings and energy modeling of buildings

As a result of the gradual depletion of fuel reserves and the threatenings over the world's ecology balance and human healt problems caused by fossil energy consumption, the awareness of clear energy is raised. Approximately 35% of this energy source is consumed in buildings. The improvement of inhouse life quality and comfort level, to meet the expectations of users' in-house technologies developed with the aim of buildings, caused an increasing over the amount of energy consumed by buildings. For a sustainable future, ecological designing criteria and technology's usage in the buildings with the purpose of obtaining the energy efficiency and usage is prefered more and more in energy awereness developed countries . In this resource, passive and active energy systems which are using ecology and green building desing criterias are defined and also energy saving potentials are determined in accordance with energy performance analysis of an operational office building. The mentioned Office building is "Söğütözü İş Merkezi Block-A" which is built according to traditional design approach and belong to "Yüksel Şirketler Topluluğu". These analysisis are made by using Power-DOE energy simulation program in accordance with this concrete instance, buildings' operational phase energy performance optimization models; improving the systems used to design ecologyical and energy efficient building are important for spreading of appliance in our country. In the buildings' operational paheses, reducing energy consumption in the meaning of active and passive energy systems; comparing the energy performance anaysis, determining amortization period of systems are covered in this resource.