Is it costly to build photovoltaic power generation on water?
Is it costly to build photovoltaic power generation on water?
In terms of pure system construction, water photovoltaic systems are mainly divided into water piling type and water floating table type.
1. The water piling type photovoltaic system is mainly difficult to construct, so the cost will increase to a certain extent. (Such as pumping water, then piling down, and then fixing the support)
2. The advantages and disadvantages of floating water photovoltaic are as follows:
1. Mainly have the following advantages:
①Saving land use: it is built on the water surface and does not occupy land resources, which can reduce the cost of land acquisition.
②Increase power generation: The water body has a cooling effect on photovoltaic modules, which can inhibit the surface temperature of the modules from rising, so as to obtain higher power generation. According to the comparative analysis of experiments on large-scale floating photovoltaic power plants in Hyogo Prefecture, Japan, due to the cooling effect of the water surface, the power generation of solar panels has increased by about 14%.
③Reduce evaporation and algae reproduction: Covering solar panels on the water surface can theoretically reduce evaporation on the water surface and inhibit algae reproduction in the water, which is beneficial to the protection of water resources.
④Convenient operation and maintenance: The photovoltaic power station is built in the water, which can reduce the pollution of the components by dust and facilitate the cleaning of the components. At the same time, it is difficult for people and animals to access the components, which can effectively prevent the damage of the components by people and animals.
⑤ Tourism benefits: The neatly arranged photovoltaic modules on the vast water surface can be used as a characteristic scenic spot, becoming a landscape in the area, and bringing tourism benefits.
⑥ Avoid module shading: Compared with land, the water surface is relatively open, which can effectively avoid the shading of modules by mountains, woods, etc. The solar radiation area is uniform and the illumination time is long.
⑦Reduce the cost of the tracking system: The component angle and spacing are consistent, which is convenient for the installation and operation of the solar tracking system. It is not necessary to install a dual-axis tracking system for each battery panel, which greatly reduces the cost of the tracking system.
⑧ Cost saving: No component foundation and bracket are needed, which saves the cost of foundation and bracket and saves costs.
⑨Easy to dissipate: It is built in the waters close to villages and cities, and it can be dissipated nearby, reducing the disadvantages of grid connection and power curtailment, and improving efficiency.
2. There are some disadvantages:
① High requirements for floating equipment: floating water photovoltaic requires floating equipment to support photovoltaic panels, and the floating body frame has high requirements for corrosion resistance, low density, frost heave resistance, wind and wave resistance, life span, and carrying capacity.
②High site selection requirements: The floating water photovoltaic farm site should be selected in a large area, stable runoff, low wind speed, good light conditions, small water level changes, good development conditions, no large-scale shipping, ecologically insensitive areas, etc. Waters.
③There are many uncertain factors: strong wind, water level, icing and other factors have a greater impact on it. At the same time, it is necessary to monitor whether photovoltaic modules have adverse effects on water quality, fish, and plants in the water.
④ Difficulty in construction: Many factors need to be considered during the construction process. It is difficult to use heavy machinery for high-efficiency construction in a large number of water operations, and the process requirements are relatively more, and the construction period will increase accordingly. There is a lot of work that requires diving or on board. Shipboard operations must consider balance and safety, and must not damage facilities such as pools and dams.
