COST OPTIMUM ENERGY EFFICIENT RETROFIT OF PRIMARY SCHOOL BUILDINGS IN TURKEY

Large portion of the building stock in EU 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 budget and is irrational. Besides, building envelope is the most effective predictor due to being in direct interaction with the external environment conditions. 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. In order to reach this paper’s goals, one of the existed typical schools building in Turkey, which is located in Istanbul, is considered as a reference one. This existed reference building’ energy audits and primary energy consumption calculated with the aid of a dynamic simulation tool, EnergyPlus. Thereafter, proper energy efficiency measures are 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 have been done for each package and related comparison have been done.