optimizing energy efficiency in building sector through the use of solar energy: case study of daylight control systems

Driven by the rising energy demand in the building sector along with environmental and financial concerns raised by the excessive use of non-renewable energy sources, architects are increasingly adopting solutions that involve the use of clean and renewable energy sources. in recent years, solar energy has gained significant traction among architects due to its numerous advantages; not only does solar radiation have the potential to improve energy efficiency within the buildings by decreasing heating, cooling, and lighting demand, it also contributes to the aesthetical and financial aspects of building designs as well as enhancing the comfort conditions of the users. notably, solar radiation enhances building energy efficiency in two key ways. first, daylighting directly reduces artificial lighting requirements. second, solar heat gain contributes to space heating during cooling-dominated periods. however, excessive solar heat gain and uncontrolled daylight can lead to both visual discomfort and unwanted heat gain, ultimately increasing reliance on artificial lighting and hvac systems. solar radiation must therefore be controlled in indoor spaces. daylight control systems (dcss) are among daylighting-based strategies to optimize energy consumption in buildings. in this study, the energy performance of 15 unique dcss is investigated using building energy simulations across 4 cities with diverse climates, aiming to assess the potential of dcss in achieving building energy efficiency around the globe. the results indicate that dcss are an effective method for enhancing energy efficiency within buildings, as they lead to a reduction of 6-32% in building energy demand across various climate types.