A Comparative Analysis of Variables Affecting Heat Gain Through Louvers Shape and Wall by Evaluating the Overall Thermal Transfer Value (OTTV)
Abstract
The selection of sun louvers is essential for effectively preventing heat from entering buildings. The shapes of sun louvers are not for beauty or effectiveness in preventing heat transfer through walls and building voids. This study compared the heat prevention properties among three types of sun louvers: a straight shape (I-shape), a curve shape (C-shape), and an overturning V-shape (L-shape) by simulating installation in the testing room of 72,000 mm and then comparing the values of heat transfer through the walls and windows of a room without a sun louver (Type A) and rooms with three types of sun louvers (Type B, C, and D). The purpose was to reach a conclusion about which sun louver is effective for sun protection and which direction is best for preventing heat from buildings. The summary shows that sun louver Type D (L -shape) provides the best shading effectiveness in the south (S) with OTTV = 54.57 W/m2 and SC = 0.291 and is helpful for architects and engineers in selecting sun louvers suitable for buildings based on energy saving and sustainability concepts.