In the sun-drenched landscapes of Agadir, Morocco, a team of researchers led by Omar Achahour at the Materials and Renewable Energy Laboratory of Ibn Zohr University has been making waves in the solar energy sector. Their latest work, published in the journal “Renewable Energy and Sustainable Development” (translated from French), focuses on a promising technology known as Linear Fresnel Reflectors (LFR). This innovative approach to solar energy could significantly impact the way we harness and store solar heat, particularly in regions with abundant sunlight.
Achahour and his team have designed and constructed a prototype LFR system coupled with a Multi-Effect Distillation system for seawater desalination. The prototype consists of 11 flat glass mirrors, totaling a reflecting surface of 1.5 square meters, and a tubular receiver-absorber housed within an evacuated glass tube. The system also includes a secondary reflector to enhance performance.
One of the standout features of their research is the use of locally abundant materials, such as bed-rock, for the thermal storage system. This not only reduces costs but also highlights the potential for region-specific adaptations of solar technologies. “Our goal was to create a system that is not only efficient but also practical and cost-effective for local communities,” Achahour explained.
The experimental study revealed impressive results. The system achieved a stagnation temperature of 263°C, with an overall heat transfer coefficient of 22.91 W/m²K. At an operating temperature of 125°C, the collector’s efficiency was estimated at 56%. These figures underscore the potential of LFR technology to deliver high temperatures and efficient heat transfer, making it a viable option for various industrial applications.
The research also delved into the impact of tank size and flow rate on the system’s thermal output through TRNSYS simulations. This aspect is crucial for optimizing the design and performance of LFR systems in real-world applications. “Understanding these variables allows us to fine-tune the system for maximum efficiency and reliability,” Achahour noted.
The implications of this research are far-reaching for the energy sector. LFR technology offers a promising alternative to traditional solar power systems, particularly in regions with high solar irradiance. Its ability to achieve high temperatures and efficient heat transfer makes it suitable for a range of applications, from desalination to industrial processes.
Moreover, the use of locally abundant materials for thermal storage underscores the potential for decentralized and community-based energy solutions. This could empower local communities to harness solar energy more effectively, reducing dependence on centralized power grids and fostering energy independence.
As the world continues to seek sustainable and renewable energy solutions, the work of Achahour and his team represents a significant step forward. Their research not only advances our understanding of LFR technology but also paves the way for innovative and practical applications in the energy sector. With further development and optimization, LFR systems could play a pivotal role in the global transition to renewable energy.