The optimum model of horizontal canopies on reducing building energy consumption

Abstract

Shading windows that are exposed to sunlight is an important method of reducing cooling energy in the hot months of the year and thus reducing annual energy consumption. One of the best ways to shade windows on the south walls is to use the horizontal canopy, which is located outside the building and above the windows. In this study, the horizontal canopy above the south wall window is optimized for different weather conditions. In order to optimize the horizontal canopy, various parameters that affect shading and solar radiation received by a window with a fixed surface of one square meter have been investigated in Kochi, India climate. These parameters are canopy dimensions, window dimensions, latitude and window location. The results include the optimal dimensions of the canopy and window as a coefficient of window height. A study of parameters on shading in Kochi climate equal to windows width Ww = 10 and e = 0, g = 0.3, pa = 0.3, provided the optimal canopy dimensions. In hot months, an optimal horizontal canopy over the south window at a rate of 505 MJ/m2 provides significant savings compared to a south window without a canopy. Radiant energy received without canopies and with canopies during the cold months. In cold months, the horizontal canopy on the south window consumes 62 MJ/m2, which is a waste of energy compared to the south windows without canopies.