Türkiye'de ilköğretim okulu binaların maliyeti optimum enerji etkin iyileştirmesi için bir yaklaşım

Large portion of the building stock in EU and Turkey was built before prosper of energy efficiency issue in building construction, hence; consume a huge amount of energy that can be preserved. On the other hands, demolition of an existing building and construction of a new energy efficient building requires huge amount of budget and is irrational. Most well-known regulation in this field is an EU Legislation, "Directive on Energy Performance of Buildings" (EPBD). The directive asserts the necessity to increase energy-efficiency for new and existing buildings; together with Recast-EPBD identifies 2020 targets related with reduction in greenhouse gas emissions, nearly zero-energy buildings and cost-optimal levels of minimum energy performance requirements for existing and new buildings. Thereupon the importance of energy efficient retrofit of existing buildings is an inevitable issue in the current situation. Schools alone are responsible for 15% of the total energy consumption in contrary to other commercial buildings, for decreasing energy consumption of this type of buildings, energy demand of buildings must be minimized and energy efficiency should be increased. Overall, it seems renovation of existing buildings with higher energy efficiency and minimum cost can be a logical step for current barriers. This research's main aim is to recognize a systematic approach for energy-efficient retrofit of school buildings in order to acquire the optimum level of retrofit action with the aid of dynamic simulation tools, and comparing different circumstances and economical variations during desired period. In order to reach this paper's goals, one of the existing typical schools building in Turkey, which is located in Istanbul, take to account as a reference building. This existed reference building' energy audits and primary energy consumption calculated with the aid of a dynamic simulation tool, Energy plus. Thereafter, proper energy efficiency measures applied to the envelope, mechanical system, and lighting system and different packages are prepared by combination measures. After all, packages' energy consumptions are calculated and global cost of each package estimated according to standard EN15459. In order to reach optimum cost level, the payback period and sensitivity analysis done for each package together with related comparison.