Introduction
The fishery-photovoltaic complementary industry (FPCI) represents a groundbreaking approach to sustainable development, seamlessly integrating aquaculture with solar energy production. This innovative industrial model, gaining traction particularly in China, addresses the pressing need for both energy and food security while minimizing environmental impact.
At its core, FPCI involves the strategic installation of solar panels above aquaculture ponds, leveraging the synergies between renewable energy generation and aquatic food production. This dual-purpose land utilization not only optimizes land resources but also yields a host of environmental benefits, ranging from improved water quality to microclimate regulation.
In recent years, FPCI has garnered attention for its potential to revolutionize traditional aquaculture practices and contribute to a more resilient and sustainable future. However, as with any emerging industry, FPCI is not without its challenges, including high initial costs and technical complexities.
In this article, we delve into the pros and cons of FPCI, exploring its environmental, economic, and social implications. By examining both the opportunities and obstacles associated with this innovative model, we aim to provide insights into its role in shaping the future of energy and food production.
Pros
1.Dual-purpose Land Utilization:
By combining solar energy generation with aquaculture, land resources are maximized. This is especially advantageous in areas with limited available land.
2.Environmental Benefits
The figures below come from one peer-reviewed field study: a 20 MW fishery–PV plant over mud-crab (Scylla serrata) ponds at Guoqiaoshan, Fuqing (Fujian, China), with 80% PV coverage, panel centre points 2.35–3.02 m above the water, and all measurements taken on a single day, 2 March 2023 (Song et al., Water 2024, 16(4), 526). Other coverage ratios, panel heights, climates, seasons and species will give different results, so treat these values as indicative and confirm them with monitoring on your own site.
Reduced Solar Radiation:
In a field study at a 20 MW fishery–PV plant in Fuqing, Fujian (Song et al., 2024), the panels blocked 89–93% of the solar radiation reaching the pond surface, and water under the array averaged 1.5 °C cooler than in the uncovered control area. This can be beneficial in maintaining optimal conditions for fish.
Light Intensity Reduction:
Light intensity at the water surface fell by 94% in the same study, which limits algae growth and suits shade-tolerant species.
Improved Water Quality:
Chlorophyll-a was 72–94% lower under the panels than in the control area, consistent with fewer algal blooms.
Enhanced Dissolved Oxygen (DO):
Dissolved oxygen (DO) concentrations were 8–24% higher under the panels, which matters for the health of fish, crabs and other aquatic organisms.
3.Microclimate Regulation:
In the same study, wind speed under the panels was 41–50% lower and near-surface air temperature averaged 0.6 °C higher, giving a calmer pond microclimate, potentially benefiting the overall environment around the pond.
4.Additional Revenue Stream:
Farmers can generate income from selling surplus solar energy, diversifying their revenue sources and enhancing financial stability.
Cons
1.High Initial Costs:Setting up Fishery PV complementary systems requires a significant initial investment, including costs for materials, labor, and technology.
2.Technical Challenges: Integrating solar panels above fishponds presents challenges, including complex installation and potential interference with aquaculture operations.
3.Environmental and Biological Concerns
The installation process may temporarily disturb the aquatic ecosystem and fish habitats.While reduced light intensity can be beneficial, it might adversely affect certain species that rely on higher light levels.
4.Regulatory Approvals:Obtaining the necessary regulatory approvals for such combined projects can be complicated and time-consuming.
In this dynamic landscape of renewable energy and food production, companies like Solaracks play a pivotal role. As a premier manufacturer of solar brackets, Solaracks is dedicated to delivering exceptional quality and value to Engineering, Procurement, and Construction (EPC) companies engaged in FPCI projects. With a steadfast commitment to precision engineering and customer satisfaction, Solaracks ensures that its products meet the highest standards of durability and performance, thus empowering FPCI initiatives to thrive.
Source: Song, F.; Lu, Z.; Guo, Z.; Wang, Y.; Ma, L. The Effects of a Fishery Complementary Photovoltaic Power Plant on the Near-Surface Meteorology and Water Quality of Coastal Aquaculture Ponds. Water 2024, 16(4), 526. https://doi.org/10.3390/w16040526