New energy includes ocean energy, solar energy, wind energy, biomass energy, geothermal energy and many other energy sources. Most of them have the advantages of clean, pollution-free, renewable and environmentally friendly. Among them, the most eye-catching one at present is ocean energy. , especially wave energy in the ocean, compared with other new energy sources such as solar energy and wind energy, has high energy density and small fluctuation range. It is an all-weather energy source with continuous and stable output, and is a strategic resource.
The huge energy of ocean waves has become one of the focuses of research and development by major countries in the world. Seizing the commanding heights in this technical field is of great strategic significance. For more than 100 years, scientists from all over the world have proposed He has made many ideas, invented various wave energy power generation devices, and filed more than a thousand invention patent applications. Especially in recent years, due to the huge pressure of energy crisis and environmental pollution, clean, pollution-free, renewable, environmentally friendly, and environmentally friendly Ocean energy technology that consumes existing resources has received widespread attention from the governments and enterprises of various maritime countries. Western countries have taken advantage of their scientific and technological advantages and invested heavily in testing various devices, and have achieved certain results. The more famous ones include "Duck" wave energy conversion device, Pelamis wave power device, AquaBuoy wave energy device Manchester_bobber wave energy device, Fred_olsen_wec wave energy device, Seavolt_wave_rider wave energy device, Oscillating Wave Converter, referred to as OWC) wave energy conversion device, OWEC wave energy device, Trident wave energy device, Seadog (Seadog) wave energy device, shrinking channel wave energy conversion device, pendulum wave energy conversion device, oscillating float Type wave energy conversion device, PS Frog and Frog wave energy device, etc.
my country has also carried out follow-up research on wave technology. Since the early 1980s, it has conducted research on fixed and floating oscillating water column wave energy devices and pendulum wave energy devices. In 1985, the Guangzhou Institute of Energy, Chinese Academy of Sciences successfully developed a wave power generation device for navigation lights using symmetrical wing turbines. In early 2005, in Zhelang Peninsula, Shanwei City, Guangdong Province, my country's independently developed wave energy independent and stable power generation system (using an oscillating water column hydraulic conversion device) was successfully tested in real sea conditions. This is the world's first wave energy independent and stable power generation system. In addition, our country has also developed a wave energy power generation system, namely an oscillating float shore-type wave energy conversion device, which uses an oscillating float as a wave energy absorption carrier, and then converts the energy absorbed by the float through a hydraulic device to drive the motor. Generate electricity.
Judging from domestic and foreign test applications, due to the complexity of the marine environment and the variability of wave energy, the expected results have generally not been achieved. Mainly manifested in the stability of energy output, energy collection, energy conversion efficiency, the impact of tidal changes, cost-effectiveness issues caused by the use of complex structures, safety issues of device structures, anti-corrosion issues of devices, and construction of marine environments Installation issues, compatibility with existing production technology and equipment, and matching issues. As a result, wave energy utilization technology has been making slow progress for many years without making key breakthroughs. This has also led to many people in China being pessimistic about the utilization of wave energy.
For a long time, people have known that waves have huge energy, but they generally believe that wave energy is the most unstable energy source. In application, emphasis is placed on improving the utilization of single waves. From the inherent characteristics of wave energy, In terms of characteristics, this is very unfavorable. The wave energy that we can normally apply is often several orders of magnitude different from the wave energy that we have during storms. In order to increase the power of a single wave, a single device is often made very large. Once a storm comes, it often exceeds the stress of its structure and materials, causing damage to the device. These include the first one manufactured in the UK (OSPREY), Norway's 500 kW shore-mounted wave energy device (MOWC), China's 3 kW shore-mounted wave energy device This can be verified during the development and construction of the oscillating water column wave power plant.
In essence, wave energy is a randomly generated energy source. Although the wave height, wavelength, period, and position of a single wave vary with time, the wave energy in a certain water area changes slowly with time. , by increasing the coverage of wave energy collection and focusing energy, strong and stable energy output can be obtained. At present, these technical problems have been solved. Judging from the test results, the expected goals have been basically achieved, especially in terms of energy collection and conversion efficiency, stable energy output, and energy collection, which are beyond the capabilities of existing devices. In comparison, I believe that people will soon be able to use this clean, environmentally friendly, no-consumption, no-emission, environmentally-friendly renewable electricity.
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