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This underwater power generation device utilizing ocean current energy is a new energy machinery and control system, and its international research started in the early 21st century. The prototype is designed for a power rating of 5 kW, a flow rate of 2 m/s, and a rotational speed of 50 rpm. This test validated the effectiveness of key technologies such as blade design, driveline, sealing and system integration and provided feedback for the next round of design work.
The principle and structure of the “underwater windmill†is similar to that of a wind turbine, and its power comes from water. Its impeller rotates at a relatively slow speed, does not produce large noise, and does not affect people's sight. Various fish can still swim freely around the impeller; it does not need to build a dam like traditional tidal power. Therefore, while generating electricity, a good ecological environment can be maintained.
At present, Zhejiang's current energy resources rank first in the country. Especially in the Zhoushan area, there are many islands. The waterways between the islands are criss-crossed. The sea water passes through the narrow waterways between the islands. The flow rate is very fast, which can form a natural underwater power plant. Research and development of underwater power generation machinery can open up a new way for renewable energy utilization to alleviate energy shortages and develop local economies in coastal areas and islands.
The first "underwater windmill" in China, Zhejiang University came out
In late April, a new type of ocean current energy utilization device, “Underwater Windmillâ€, was successfully tested in Haishan County, Zhoushan District, Zhejiang Province. The prototype of this “underwater windmill†model was obtained by Li Wei, School of Mechanical and Energy, Zhejiang University. Developed by professors, it is the first "underwater windmill" in China.