Plastic Meshes for Solar Control: Characterization, Optical Measurements, and Shading Efficiency

Shading systems are essential in managing solar gains in buildings, significantly impacting energy efficiency and occupant comfort. This study investigates the potential of plastic meshes as alternative shading devices, emphasizing the interaction between mesh geometries and solar radiation. Samples with diverse patterns were sourced from various production sectors following a technology transfer approach, then modelled and characterized using shading factors in two representative months in Milan, Italy. Preliminary spectrophotometric measurements of solar and visible transmission and reflectance properties were conducted to determine the material properties necessary for the simulations. The innovative systems were considered as both static and movable with minimal adjustments to exploit their 3D texture potential in shading effect. A novel parameter, "T" was introduced, which combines the openness factor and material amount, linking cost-to-weight efficiency with solar performance. Simulated shading factors influenced by the openness factor ranged from 48% in winter to 77% in summer, demonstrating seasonal adaptability. Geometrical adjustments, including ±10° tilting, led to further performance improvements, enhancing shading factors by 4.2% in June and 5.7% in December. This research demonstrates the potential of plastic meshes as adaptable, sustainable shading systems that offer significant flexibility and customization. These systems provide favorable cost-benefit ratios, presenting a compelling alternative for building facades and promoting energy efficiency through tailored solar control solutions.