The Effect of Window Alternatives on Energy Consumption and Life Cycle Cost in Moderate-Humid Climate Regions in Residential Buildings

Abstract

Recently, the amount of energy consumed in buildings has increased daily due to technological developments and population growth. Significant portion of this energy is consumed in residential buildings. Reducing the energy consumption of residential buildings is crucial, considering the depletion of fossil-based energy resources and its effect on the economy of the countries. This study aims to investigate the effect of window alternatives on the reduction of energy consumption and life cycle cost (LCC) of residential buildings for heating and cooling. The study is carried out in the city of Trabzon, which represents the moderate-humid climate region. For this study, a residential flat that has 1+1 floor plan for a family of two, is used for simulation. For this flat, yearly heating and cooling energy consumptions and life cycle costs are calculated using DesignBuilder simulation program according to different window-wall ratios of window alternatives. Window assembly alternatives are composed of double glazing units with clear glass, low-e glass, blue tinted glass and reflective glass and PVC frame. As a conclusion, the most energy and cost efficient window alternatives for moderate-humid climate regions are recommended.