Agrivoltaics is increasingly being integrated into agricultural fields, and it’s common to see crop fields equipped with solar panels. Although space remains a challenge, experts are continually exploring innovative ways to maximize land use, like rainwater capture. Recently, a group of Colombian engineers devised a promising solution.
The study. Researchers of the Electrical Machines and Drives Research Group at the National University of Colombia have created an agrivoltaic system that combines solar panels with hydroponic growing towers to utilize rainwater effectively. The goal is to optimize every square foot of farmland.
How does the system work? Colombian engineers propose using modular hydroponic growing towers. Each tower features an 8-inch hollow design stacked with spaces for vegetables. For the prototype, they’re focusing on crops like lettuce, chard, and spinach. Each tower can reach up to 8 feet in height, and solar panels are installed at the top of these towers.
Importantly, the study highlights that the circular design allows for the optimization of space, enabling up to 80 plants to grow in a 10-square-foot area. Additionally, the hydroponic towers are designed so that farmers don’t have to bend down continuously. The modular and vertical structure makes access to plants easier.
The hydroponic growing tower consists of several “rings” that, when stacked together, create a structure of up to 8 meters.
However, the shadow cast by solar panels can pose a problem for crops. To address this, researchers are exploring the use of semi-transparent solar panels that allow more light to pass through. Schools in Japan and greenhouses in the United Kingdom are already using these types of panels.
Additional features. One innovative aspect of the hydroponic towers is their ability to collect and maximize rainwater use in agricultural production areas. However, the Colombian project is also applicable to livestock farming. This is because solar panels can be installed in areas where cows are kept, simultaneously generating energy and milk.
What’s next. The project now needs to evaluate the resistance and durability of the structures against inclement weather.
The growth of agrivoltaics. The integration of agriculture and energy sectors stems from a mutual need for land. Efforts to find a harmonious coexistence of these spaces involve mathematical formulas that leverage the benefits of the shade provided by the solar panels, even resulting in better-quality wool and wine.
Image | National University of Colombia
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