What are the advantages of complementary photovoltaic power generation on water, fishing and light? What is the development potential?
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What are the advantages of complementary photovoltaic power generation on water, fishing and light? What is the development potential?
Classification：Jiangsu Neusoft
Release Date：2021-10-14 16:03
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As photovoltaics are used more and more widely in life, people arePhotovoltaic industryThe understanding has gradually deepened. The construction of photovoltaic power plants in the water environment such as ponds, small lakes, and reservoirs is calledWater photovoltaic。The complementarity of fishing and light is“water power generation, underwater farming”the model is conducive to give full play to the benefits of land.Jiangsu NeusoftIn terms of advantages and development potential, I will introduce to you the complementary photovoltaic power generation of water, fishing and light.
1、What is a complementary photovoltaic power station
Set up an array of photovoltaic panels above the water surface of the fish pond, and fish and shrimp can be cultured in the water below the photovoltaic panels, forming a "water power generation, underwater fish farming" mode. This combination of fish farming and photovoltaic power generation is called "fishing light". Complementary". This model reduces the occupation of land resources such as agricultural, industrial and residential land, and is conducive to improving the economic value of the land.
2、Advantages of complementary photovoltaic power generation
The complementation of fishing and light will bring many benefits. On the one hand, fishermen can rely on existing fishpond resources to build photovoltaic power stations above the fishponds, which can obtain income from farming and photovoltaic power generation. On the other hand, they have the best of both worlds. , Photovoltaic power generation can also supply power to the aerators, water pumps and other equipment in fish ponds. The excess electricity can be sold to the grid at the desulfurization price,，which can generally be paid back in 7-8 years.。
In addition, the solar panel also has the effect of shading the fish pond, lowering the sleeping temperature, reducing water evaporation, effectively shielding the strong sunlight from the sun, and greatly reducing the probability of fish and shrimp being scalded by the water. In addition, the solar panels block part of the sunlight, reducing the photosynthesis of plants on the water surface, such as algae, which not only inhibits their growth and reproduction, but also improves water quality and provides a good environment for the growth of fish.
3、The development potential of complementary fishing and light on the water
The complementarity of fishery and light has great development potential in the future. As a large country in the production, trade and consumption of aquatic products, China ranks first in the world in terms of aquatic product output. In addition, we are the only country in the world whose aquaculture output exceeds fishing output. After the development of fisheries in China, a large number of fishing grounds have been opened, which has promoted the development of a batch of feed, processing, and aquaculture enterprises. According to estimates, the construction of a 1MW solar power station requires 20-30 acres of fish pond water surface. Therefore, in terms of energy saving, 348 tons of standard coal can be saved every year, and carbon dioxide emissions can be reduced by about 1,000 tons; economically, the complementation of fishery and light can bring Relatively considerable income from power generation, and there can also be income from electricity bills while breeding, which is a very good income-generating project.
4、Precautions for fishing and light complementary site selection
In the process of site selection, the solar energy resources are abundant, it is close to the substation connected to the system, the transportation is convenient, the land is flat and the area is large, and it is more suitable for construction.fishing and light complementary photovoltaic power station. At the same time, the site selection area should avoid small reservoirs, flood discharge areas, coastal beach areas, salt farms, navigable waters, etc. In addition, attention should be paid to the design of flood prevention level for important facilities and equipment. If the site of the power station is naturally low, flood prevention evaluation can be carried out when necessary.
5、Precautions for the design of aquatic fishing and light complementary system
The construction of the fishing and light complementary photovoltaic mounting system should consider humidity, long-term weather resistance and reliability. In the construction of water power stations, the components will be harmed by water vapor and salt in the water vapor. High humidity and frequent water surface fluctuations will also cause the PV modules to produce PID effects. Lead to cracking problems. In addition, in terms of design, it is necessary to consider a variety of conditions in view of the higher structural strength requirements of the support system, so as to fully and effectively ensure the safety of power station operation and maintenance.。
1. Crack resistance: The complexity of the water surface environment is likely to cause the components to appear cracks, snail patterns, etc., so the quality of the components must be good, otherwise the power generation power reduction and safety hazards are likely to occur during long-term use.
2. High waterproof level: As the fishing and light complementary project is built on the fish pond, there are certain requirements for the waterproof level of photovoltaic equipment.
3. Ultraviolet aging resistance: water has high reflectivity to ultraviolet rays, and the back of the module is easily exposed to a large amount of ultraviolet radiation, so it is necessary to prevent ultraviolet aging.
The fishing and light complementary project effectively promoted the improvement of water surface resource utilization efficiency and promoted the development of local resources. Many regions in China have extensive river networks, reservoirs, and ponds. The development and construction of "fishing and light complementary" photovoltaic power plants on these idle water surface resources will effectively promote the application of photovoltaic power generation in China and promote the new direction of local agricultural economic development.
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