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Usually, people choose to build dams on rivers for hydroelectric power generation. However, engineers in Hong Kong have recently come up with whimsical thoughts and developed a device that can generate electricity from water pipes.
It is reported that there are a total of 7,800 km of water pipes in Hong Kong. In order to monitor whether the water quality is in a qualified state in real time, water companies need to set up water quality monitors at different locations. These monitors need to consume a certain amount of electricity to maintain operation. As a result, engineers at the Department of Building Equipment Engineering at the Hong Kong Polytechnic University came up with the idea of ​​inventing a device to generate electricity for water quality monitors on urban water pipes.
This device uses a special spherical turbine that perfectly adapts to the circular shape of the water pipe. It adopts a center hollow structure. The edge of the ball is composed of 8 rotary vanes. The tilt angle of each rotary vane is very large. Therefore, it will not produce too much resistance to the flow of water, so this design is used rationally. The flow energy of the water pipe also minimizes the energy loss due to blade turbulence.
In addition, its power generation is quite good, and each generator can generate 80 volts to meet the demand of 4 fluorescent lamps. If installed in all the corresponding locations in Hong Kong, it can generate 700 kWh of electricity each year, which is equivalent to 560 kg of CO2 emissions.
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