Why does China want to build a "giant power bank" at sea?

Tech 2023-07-18 19:14:38 Source: Network

#Headlines on current events and hot topics#For islands or deep-sea installations far from the mainland, solving the problem of "existence" is more important than the problem of "nobility".Produced by Zhengxie BureauRecently, China independently developed the floating Wave power power generation device "Nankun"Put into trial operation

#Headlines on current events and hot topics#

For islands or deep-sea installations far from the mainland, solving the problem of "existence" is more important than the problem of "nobility".

Produced by Zhengxie Bureau

Recently, China independently developed the floating Wave power power generation device "Nankun"Put into trial operation.

This is the first megawatt floating Wave power power generation device in China and the world.

What is Wave power power generation device?

As is well known, in the context of energy conservation and emission reduction, countries around the world are vigorously developing new energy.

Hydroelectric power generation, wind power generation, and solar power generation are currently typical representatives.

In fact, another way is Marine energy.

The ocean occupies 71% of the earth's surface area and contains abundant energy, such as Tidal power, Wave power, ocean temperature difference energy and Osmotic power.

The newly commissioned "Nankun"

Wave power, literally, is the use of ocean waves to generate electricity.

There are many kinds of Wave power power generation devices, and the principle is basically the same, that is, first absorb Wave power through the Wave power capture device, then convert Wave power into stable output mechanical energy through the transmission mechanism, and finally use the power generation device to convert mechanical energy into electrical energy.

Wave power power generation mode

After rough calculation by experts, one square kilometer of sea surface can generate 200000 kilowatts of energy, so the global Wave power reserves are about 2.5 billion kilowatts.

The reserves of Wave power in China's offshore waters are about 150 million kilowatts, of which the reserves that can be directly developed and utilized reach 23 to 35 million kilowatts.

As early as the 1940s, Japan began to study Wave power power generation.

1980

Wave power disclosure and patent applications in China

In 2000, the Guangzhou Energy Research Institute developed and constructed the first 100 kW shore type oscillating water column power station in Shanwei, Guangdong, achieving grid connected power generation.

At present, Wave power power generation has changed from theory to reality, but to put it into use and produce practical results, two difficulties need to be overcome.

This is also the 'Nankun'Breakthroughs.

The first breakthrough point is efficiency.

Although the waves above the sea are long-lasting, they are not continuously stable.

In addition, Wave power can be converted into electric energy only after three levels of energy conversion, with high energy loss.

Because of this, the previous Wave power power generation device has a capacity of only a few hundred kilowatts.

In order to improve efficiency and expand capacity, the "Nankun"

Furthermore, the "Nankun"Adopting adaptive wave power generation technology, the generator set is automatically adjusted for wave size.

Finally, the conversion system developed by China has improved the overall conversion efficiency of Wave power to 22%.

Nankun

NankunWith a floor area of over 3500 square meters and a weight of over 4000 tons, it operates at full capacity and generates 24000 kWh of electricity per day, meeting the daily electricity needs of 3500 households.

The second breakthrough point is reliability.

The equipment is located in the ocean, which not only needs to withstand the strong winds of typhoons, but also prevents the corrosion of seawater.

NankunIt can automatically inject water into the interior, increase the weight of the device to make it sink, so that it can resist the Super Typhoon of 16 levels.

NankunWe also made special designs.

NankunThe practicality of is greatly enhanced.

Technical problems have been solved, and Wave power power generation still faces cost problems.

At present, the Cost of electricity by source of Wave power is much higher than that of conventional thermal power generation.

Cost Comparison of Various Power Generation Methods in China in 2021

Nankun

The problem of comprehensive cost has become the biggest obstacle to the popularization and large-scale use of Wave power power generation.

Is it necessary to develop Wave power power generation devices?

The answer is yes.

First, Wave power power generation is a global trend.

33000Nankun

Global Tidal power and Wave power Projects

According to the latest report released by AstuteAnalytica, the analysis and consulting company, the global wave and Tidal power energy market revenue will be 477.81 million dollars in 2022, and it is estimated that the revenue will exceed 10 billion dollars by 2031, with a compound annual growth rate of 43%.

Cumulative600Power generation equipment,CumulativeMore than 600 units have been deployed and exported to countries such as Japan.

China should not be absent from this industry trend and the blue ocean market.

Secondly, there is a path to cost reduction.

Although the cost of Wave power power generation is still relatively high, the cost will be further reduced with the iteration of technology and the expansion of scale.

Thirdly, support the marine industry system.

Electricity is the foundation of modern industry.

With the Wave power power generation device, the marine industrial systems such as seawater desalination and water treatment, offshore hydrogen production, and deep-sea aquaculture have strong support.

Taking offshore aquaculture as an example, it is impossible to move from the nearshore to the deep sea without electricity.

602816

This platform not only enables automated fish farming, but also has a living space for 20 people, equipped with living equipment such as seawater desalination, sewage treatment, water heaters, air conditioning, and freezers.

The key to achieving these functions is a comprehensive power system.

1206060

With electricity, the marine industry system can operate efficiently.

Among them, cost is a relative concept.

Problem withProblem withMore important.

After 35 years of perseverance, China has achieved a reclamation area of 2.8 square kilometers on Yongshu Island.

Here, there are radar stations, lighthouses, coastal defense forts, airports, docks, satellite communication stations, hospitals, schools, shops and other facilities.

Yongshu Island

Yongshu Island1000

This makes it very difficult to provide electricity and daily necessities for the entire island.

Yongshu Island

NankunPower generation equipment,The power generation of just one unit is sufficient to meet the daily electricity needs of at least 3500 households.

Yongshu Island

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