Researchers in France have investigated how photovoltaic electricity generation can be combined with the growth of hyperaccumulating plants in no longer use, polluted brownfield country and have discovered that this combination can increase the profitability of the so-called farmer-a vegetable approach to the clean-up of polluted environments.
A group of researchers from the French Université de Lorraine has investigated the impact of PV plants mounted on the ground on the growth of the so-called hyperaccumulating factories in unused, polluted Brownfield country and have discovered that the solar panels have a protective function for the plants that have the ability to have the most of their air area).
The use of these plants to restore antroped environments such as industrial wasteland is known as agromining, which itself is a branch of phyto mediation itself a vegetable approach to cleaning up infected environments.
“Deze fabrieken zijn in staat om biologische beschikbare MTE’s door hun wortels te absorberen, gevolgd door hun translocatie naar hun luchtonderdelen waar ze worden opgeslagen in niet-toxische vormen,” legden de wetenschappers uit, en merkten op dat de meest voorkomende MTE’s aanwezig zijn in besmette gebieden zoals arseen (AS), cadmium (CD), Copper (CO), lead (PB) en zink (PB) en zink (Pb) and zinc (sentence). “This process was well received by the public and the most important advantage remains the low costs compared to conventional soil disamination methods.”
The research work was aimed at a special type of hyper -accumulating plant that is known as Noccaea Caerulescenswhich is usually used for collecting CD.
The experimental arrangement was located in Bourget-du-Lac, in the Auvergne-Rhône-Alpes region in the east of/southeastern France, and consisted of a PV system mounted on the ground consisting of three rows of southern-oriented Opaque and semi-transparent PV-Modules that were held on 30 ° and and and and the land. The modules were installed together on the strips at a distance of 11 m apart to prevent unwanted shade. Tests were performed for fourteen weeks from July to November 2023.
The scientists used 29o W PV modules from the German Solarworld and 285 W panels from the Japanese Panasonic, Nambed, on1 and on2 for the experiment, respectively. In addition, it used 410 W semi-transparent bifacial PV modules from the Chinese manufacturer Jolywood, called ST for the experiment.
Image: Université de Lorraine, Applied Energy, CC by 4.0
The group used T-type thermocouples to measure the PV module temperature and a sensor that measures the photon flux (PPF) with a sensor in the photosynthetically active radiation (par) Spectrum of the plant covering. It also used an anemometer to measure wind speed, a pyranometer to measure the global radiation and a weather -clear output temperature sensor to measure the air temperature and relative humidity.
Testing showed that the solar panels have a positive effect on protecting the plants against “intense” solar radiation, in which plant biomass grows up to three times more under the panels than in reference areas without modules. Moreover, the plants that were grown under the PV modules were found to be an 18 times higher capacity to convert solar energy efficiently.
“The results showed that plant covering partially exposed to the Sun developed potential defense mechanisms against intense solar radiation, while plant covering under the shadow of the PV modules was given optimum protection that promote their development,” the scientists said. “That is why we have recommended to grow Noccaea Caerulescens Under the shadow of opaque PV modules during periods of intense solar radiation. “
They also discovered that, thanks to the cooling effect, the PV module performance could improve by around 18%, especially under “pronounced” sunny conditions. “We have recommended that the phenomenon of Evapotranspiration must be taken into account in the thermal modeling of PV modules and their energy production,” they concluded.
Their findings are available in the newspaper “What is the optimum configuration for integrating hyper -accumulating plants with photovoltaic systems to improve the development of plants and energy production? “,” which was recently published in Applied energy.
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