Earticle

Current Energy Efficiency Rating System focused on thermal performance and air tightness rather considering complex performance such as optical properties or the ventilation frequency. Insufficient evaluation values are limited to evaluate window performance precisely so that additional values should be considered to enhance window performance and reduce building energy consumption as a consequence. In this study, SHGC and mid-term ventilation frequency have been selected for the additional values and then proposed window’s optimized performance index by optimization procedure. In optimization, the direct search method Hooke&Jeeves algorithm which efficient for searching extremum has been used. As a result, the optimized model have shown energy saving 11% in central area and 15% in southern area.