Abstract

Traditional building integrated solar thermal systems (BIST) often face challenges such as high costs, design constraints, and glare, limiting their widespread adoption. To address these issues, this study aims to propose a novel building-integrated solar thermal system called the Black Wall (BW), which enhances energy efficiency by utilizing capillary tubes without glass covers. Since existing energy simulation programs, Energy Plus and TRNSYS, do not provide models suited for analyzing the BW system, it was necessary to develop a custom model. A mathematical model, based on RC networks and the fin method, was developed to simulate the thermal performance of the BW system. The simulation model based on this mathematical model was validated through comparing its results with experimental data collected from a test installation.