Proposal of Radiation Fluxmeter for Measurement of Asymmetric Radiation Field

Abstract

In this study, CPC (Compound Parabolic Concentrator) radiation fluxmeter was newly developed for the measurement of the asymmetric radiation field such as urban street canyon with the strong solar radiation especially in summer. The developed fluxmeter consists of the CPCs and radiation flux sensors, and can collect the limited directional radiation from solid angle decided by the acceptance half-angle of the CPC. The optical characteristics of the CPC and the heat balance at the radiation flux sensor were numerically analyzed from a viewpoint of radiative heat transfer. Furthermore, a prototype CPC radiation fluxmeter was made and validated by fundamental experiments.