From Hohai University, efficient use of water resources and Engineering, National Engineering Research Center Security jointly developed by the Chinese wind turbine has been a major breakthrough in key technologies with independent intellectual property rights of 10kW vertical axis wind machines have been developed and manufactured, and sold to the European market.
China’s wind generators industry has developed rapidly, in 2008 the national total installed capacity of wind power to reach 12.2 million kilowatts, is “Eleventh Five-Year Plan” task two times. In 2009 the national total installed capacity is expected to reach 20 million kilowatts.
Statistics show that domestic wind turbines machine manufacturing enterprises with more than 70, more than other parts of the world’s total wind power equipment manufacturers.
However, the core technology and key components, the various enterprises is the introduction of route to go. Rely heavily on the introduction, the core technology and independent innovation capability deficiencies, resulting in high cost of wind power. The key to the wind turbine technology for basic research on China’s wind power development significance.
According to Water Resources and Hydropower Engineering, Hohai University, Professor Zheng Yuan, at present the large-scale wind turbines are horizontal axis wind turbine. But the horizontal axis wind turbine design technology complex, dozens of tons of weight to be installed in the cabin altitude of nearly 100 meters, the power exists yaw losses, these are the domestic causes of the higher cost of wind power.
In China, developed its own vertical axis wind machines without the need for wind, there is no yaw power loss; blade design is simple, completely self-design; cabin and gear box can be placed under the wind wheel or on the ground, maintenance costs, lower; vertical axis wind turbine noise smaller than the horizontal axis, noise pollution, reduced; In addition, laboratory studies have shown that the wind energy utilization coefficient of not less than the horizontal axis.
“Calculated and experimental results prove that the design of the spiral optimized S-type wind wheel wind than traditional S-wheel wind energy utilization of a net increase of 6%. This is in terms of S-type wind turbine is a very significant improvement.” Zheng Yuan said.
But here, some experts also said that wind power equipment manufacturing industry is relatively weak. Some developed countries, compared with foreign countries, China’s wind energy development, whether in technology, scale, level or speed of development, there is a wide gap. The low level of power generation equipment at home to become China’s wind power industry of the main obstacles.
Due to lack of long-term investment, China’s wind power equipment manufacturers to produce relatively small size, less intensive, product quality is not very stable, cost-effectiveness is also relatively low. High costs, high prices are constraining wind power technology commercialization and promote the use of the the biggest obstacle.
Business degree from a technical perspective, wind turbine life expectancies, it is difficult to ensure that technical service life of 20 years, hence the need to improve the reliability of all components. This can be through the fan system optimization design, selection of better materials and advanced controls and other measures to achieve.
Electrical equipment manufacturers the world’s power has the upper hand in Germany, Spain, the Netherlands, Denmark, the United States and other countries in the world could be utilization of wind from the original 50% to 98%, wind energy utilization coefficient of ultra-40%.
But in recent years, China’s wind power equipment and technology to improve and manufacture of rapid progress. In August of this year, Liaoning Province, Shenyang City, China Chong Wind Energy Co., Ltd. have complete independent intellectual property rights of the 20 units 1.5 MW wind turbines in Inner Mongolia recently Saihantala wind farm commissioning successful, the first group of 240 hours have passed the acceptance the successful realization of the grid. The 20 wind generators, the whole cost of wind turbines than abroad reduced by 20% to 30%, the average utilization rate of 99.64% and the fans.
