JAUE2022-129: Fundamental Research on an Environmental Device using An Expression Technique to Project Shadows Created by the Setting Sun on A Wall

Abstract

The purpose of this study is to project the shadows created by the setting sun on the wall surface, assuming an open seaside location to the west. The wall surface that projects the shadow and the object that is the source of the shadow's shape are considered to be the environmental device. Simulation is performed to study the speed and angle at which the shadow moves, and the optimal position and shape of the wall surface. From the simulation, we found that the speed at which the shadows move on the wall increases as the distance between the object and the wall increases, that the angles of the shadows at the summer solstice and winter solstice do not change when the spring and autumn shadows are viewed directly in front of the object, and that the winter solstice shadow is more distorted when comparing the summer and winter solstice shadows. In addition, the distance between the object and the wall, the width of the wall, and the height of the wall were verified to determine the time when the shadow is projected on the wall. We were then able to derive the optimal height and width of the environmental device.