Analysis of Measured Irradiance from Experiment of Diffuse Irradiance Shadowing
Abstract
Photovoltaic technology is constantly evolving and its supply is increasing in various regions. Especially, as installation technology of solar panel is developed and efficiency is increased, installation is increasing in a complex area with many shadows. Therefore, it is necessary to study the shadow effect caused by the complex objects in the surroundings such as buildings and trees. This study designed an experiment of measuring diffuse irradiance with shadowing blocks. The objective of this experiment is to quantitatively measure and analyze the change in irradiance by the shadowing blocks. Shadowing blocks are designed to make blocks having an equal area from the view of solar radiation meter but different distances. Calibration of measured data from two solar radiation meter and the preprocessing methods are devised and applied. Tendency and variance of data are analyzed and patterns are derived. The results of this study are expected to help the installation of solar power systems.