High altitude wind energy: a promising green energy field?
2024-11-18
Recently, China's independently developed floating wind power generation system has successfully launched for power generation, attracting attention from the industry. As an important component of the new energy field, high-altitude wind energy is considered a promising green energy source due to its advantages of cleanliness, renewability, high energy density, and high utilization hours. Collecting high-altitude wind energy can obtain clean, low-cost, and highly stable wind power, which has a profound impact on its development and utilization, or on the green transformation and sustainable development of global energy. China is one of the countries with the richest high-altitude wind energy resources in the world. How is the development of related technologies? How far is it from the application stage? How to plan a layout to provide new impetus for the green transformation of energy structure? The reporter conducted research and interviews with relevant enterprises and experts with these questions to understand China's exploration and practice in the field of high-altitude wind energy. On October 10th, the S500 ducted floating wind power generation system with completely independent intellectual property rights was successfully launched into the experimental area of Jingmen Zhanghe Airport in Hubei Province, reaching a height of 500 meters and generating electricity. It is reported that the ducted floating wind power generation system is a technology and equipment system that uses helium filled floating devices to lift lightweight generator units to a set height, and uses the principle of ducted injection diffusion to transmit electrical energy to the ground through cables. The entire system consists of a floating platform, power generation modules, power transmission, and mooring cables. The previous height of 297 meters and 30 kilowatts of power generation were maintained by foreign research teams for a long time. Beijing Linyi Yunchuan Energy Technology Co., Ltd. collaborates with multiple research institutions such as Tsinghua University and the Chinese Academy of Sciences for collaborative innovation. The R&D team has completed the initial validation prototype, process validation prototype, 10000 meter floating prototype, and principle testing prototype, forming two product series: the emergency rescue model (S500) and the primary power grid model with a power generation height not exceeding 3000 meters. The S500 ducted floating wind power generation system is a product series developed for low altitude economic application scenarios such as emergency rescue, intelligent surveying, and urban security. When an earthquake or flood occurs, it can quickly take off, help ensure on-site power supply, smooth communication, and transmit real-time footage back to the command center Weng Hancolan, Chief Technology Officer of Beijing Linyi Yunchuan Energy Technology Co., Ltd., introduced that the S500 with a diameter of 15 meters and a length of 23 meters successfully lifted off to a height of 500 meters. The load capacity, lift to drag ratio, and wind energy utilization rate meet the standards, and the windward posture is stable. The power generation remains above 50 kilowatts. Subsequent tests will also be conducted at a height of 1000 meters and a power generation capacity of 100 kilowatts. Dun Tianrui, founder and CEO of Beijing Linyi Yunchuan Energy Technology Co., Ltd., said that the S500 ducted floating wind power generation system has built an independent technology system based on the layout of injection diffusion lift body ducts, with wide area low-temperature gas circulation technology, photon wind field remote sensing prediction system, and crystal oscillator high-power density DC power generation system as the backbone. The competition for high-altitude wind energy from 500 to 10000 meters above the ground is a new energy source that has not yet been developed and utilized by humans. This is a renewable clean energy source with abundant reserves and wide distribution. A research report by foreign environmental and climate scientists points out that the wind energy stored in the sky exceeds the total energy demand of human society by more than 100 times. The characteristics of high-altitude wind are high wind speed, wide distribution, stable wind direction, and continuous throughout the year, which have high energy development value. In wind power plant areas with abundant wind energy resources, ground wind power is much lower than that at high altitudes, and the wind density near the ground is less than 1 kilowatt per square meter. In high-altitude areas, the wind density can reach 5 to 10 kilowatts per square meter, or even higher. According to the basic principle of wind power generation, the energy in the wind is proportional to the third power of the wind speed. Gong Zeqi, the director of the aerostat high-altitude power generation project of the Institute of Aerospace Information Innovation of the Chinese Academy of Sciences, explained that this means that when the wind speed is doubled, the energy in the wind is increased to 8 times, and when the wind speed is doubled, the energy in the wind is increased to 27 times. Therefore, places with fast wind speeds are ideal wind power plants. China is one of the countries with abundant high-altitude wind energy resources in the world. Inner Mongolia, northern Gansu, and southeastern coastal areas have the highest concentration of low-level wind energy. When the altitude is above 5000 meters, the wind energy density in most areas of China exceeds 1 kilowatt per square meter. Collecting high-altitude wind energy can obtain clean, low-cost, and highly stable wind power, which makes the power generation efficiency of high-altitude wind energy much higher than that of ground wind power. In recent years, with the development of material technology, floating device technology, and lightweight motor system technology, the value of high-altitude wind power generation technology has gradually become prominent, providing sustainable and renewable energy solutions for global energy transformation and becoming a key component of global energy transformation. In fact, as early as the energy crisis in the 1970s abroad, various designs for high-altitude wind power generation systems continued to emerge. Developed countries have never stopped researching high-altitude wind power generation, and the United States, France, Germany, the Netherlands, Italy, and other countries have conducted high-altitude wind power generation experiments multiple times. Currently, there are over 50 high-altitude wind power generation companies worldwide, with hundreds of patents registered. Gong Zeqi said that there are various ways to develop high-altitude wind energy. According to the different methods of wind energy capture and electromechanical energy conversion, the world's high-altitude wind power generation technology can be divided into two types: airborne high-altitude wind power generation and land-based high-altitude wind power generation. With the increasing global demand for renewable energy, high-altitude wind power generation technology is becoming a new star in the field of green energy, accelerating the transition from technological breakthroughs to practical utilization. Professor Lu Chao, Deputy Director of the Department of Electrical Engineering at Tsinghua University, believes that China gradually possesses the "favorable timing, geographical location, and human resources" for the development of high-altitude wind power. Time is driven by both policy and market. China is firmly promoting carbon peak and carbon neutrality, and high-altitude wind power generation technology has ushered in unprecedented development opportunities. The introduction of a series of policies such as the "14th Five Year Plan for the Development of Renewable Energy" and the "Action Plan for Energy Technology Revolution and Innovation (2016-2030)" has included high-altitude wind power generation technology in the national key research and development plan guidelines, providing clear and broad market prospects for the high-altitude wind power generation industry. In addition, energy central enterprises have established new energy business sectors including high-altitude wind energy development, and the high-altitude wind power market is gradually heating up. Geographical location and abundant high-altitude wind energy resources. China's unique high-altitude wind energy resources provide natural geographical advantages for the development of high-altitude power generation technology. According to internationally authoritative climate monitoring data, the best location for high-altitude wind energy is along the east coast of Asia, where China is located. Data shows that the wind density of the most advanced ground wind power plants is less than 1 kilowatt per square meter, while the average wind density in most areas of China at an altitude of 10000 meters above land exceeds 5 kilowatts per square meter. Among them, the wind density near the high-altitude jet stream in the Jiangsu Zhejiang Shandong region can even reach 30 kilowatts per square meter. China has particularly good conditions for high-altitude wind energy, with strong and widely distributed winds, and most areas have climate conditions suitable for the development of high-altitude wind power. Human harmony, technological breakthroughs, and talent advantages. It is understood that the successful exploration of land-based and air based technology routes by Chinese enterprises has enabled China to rank among the world's top in disruptive high-altitude wind energy technology. The group of professional technical and management talents cultivated in this process will also provide stable and continuous intellectual support for the development and application of high-altitude wind power generation technology in China. Lu Chao suggested that by providing policy support, market access, international cooperation, and accelerating the construction of demonstration projects, we should fully utilize the advantages of favorable timing, location, and people to accelerate the transition of high-altitude wind energy from technological breakthroughs to practical utilization, and achieve commercial and large-scale development. (New Society)
Edit：Yao jue Responsible editor：Xie Tunan
Source：Economic Information Daily
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