In the pursuit of more cost-effective and efficient concentrating solar power (CSP) systems, researchers are turning their attention to the reflective facets that make up heliostats—the mirrors that concentrate sunlight onto a receiver. Traditionally, these facets are made of silvered glass, a material that, while effective, accounts for a significant portion of the total plant cost. Enter Jean Schnaar-Campbell, a researcher at Stellenbosch University, who has been exploring alternatives that could revolutionize the CSP industry.
Schnaar-Campbell’s recent study, published in the proceedings of the Solar Power and Chemical Energy Systems (SolarPACES) Conference, delves into the world of non-glass reflectors. These novel reflectors, often flexible, require structural support to maintain their shape and functionality. The challenge lies in selecting the right materials for these supports—a task that Schnaar-Campbell has tackled with a methodical approach.
The research employs analytical models to screen a wide range of candidate materials based on key factors such as strength, stiffness, and deflection due to gravity. Using an existing glass reflector panel as a benchmark, the study efficiently narrows down the options. “The goal was to create a framework that allows us to quickly evaluate and select the most promising materials,” Schnaar-Campbell explains. This approach not only saves time but also resources, as it reduces the need for extensive experimental testing.
One of the standout findings from the study is the potential of sandwich panels as viable support structures for non-glass heliostat facets. These panels, composed of layers of different materials, offer a balance of strength and lightweight properties. The most promising designs were further investigated through experimental testing, with the analytical model predictions showing a moderate alignment with the physical test results. This validation underscores the utility of the model for rapid material selection.
The implications of this research are significant for the energy sector. By identifying cost-effective and high-performing materials for heliostat facets, the study paves the way for more affordable and efficient CSP systems. “The top-performing sandwich panel designs demonstrate the potential for cost savings and increased facet size compared to traditional glass facets,” Schnaar-Campbell notes. This could lead to more competitive solar power solutions, making a substantial impact on the renewable energy landscape.
Moreover, the framework developed by Schnaar-Campbell provides a valuable tool for future research and development in the field. As the demand for clean and sustainable energy continues to grow, innovations in CSP technology will be crucial. This study not only advances our understanding of material selection for heliostat facets but also sets a precedent for similar endeavors in the renewable energy sector.
In the ever-evolving world of solar power, Schnaar-Campbell’s research stands as a testament to the power of innovation and the potential for transformative change. As the energy sector continues to seek out more efficient and cost-effective solutions, the insights gained from this study will undoubtedly play a pivotal role in shaping the future of concentrating solar power.