The National Development and Reform Commission and the National Energy Administration released: Hydrogen energy is clearly included in the "new energy storage"
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- Time:2021-10-19
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[Descripción resumida]Recently, the National Development and Reform Commission and the National Energy Administration issued the "Guiding Opinions on Accelerating the Development of New Energy Storage", and hydrogen energy was clearly included in "new energy storage".
The National Development and Reform Commission and the National Energy Administration released: Hydrogen energy is clearly included in the "new energy storage"
[Descripción resumida]Recently, the National Development and Reform Commission and the National Energy Administration issued the "Guiding Opinions on Accelerating the Development of New Energy Storage", and hydrogen energy was clearly included in "new energy storage".
- category:Industry News
- Autor:
- Fuente:
- Time:2021-10-19
- Visitas:0
Recently, the National Development and Reform Commission and the National Energy Administration issued the "Guiding Opinions on Accelerating the Development of New Energy Storage", and hydrogen energy was clearly included in "new energy storage".
It is particularly critical to build a new power system with new energy as the main body and to speed up the large-scale deployment of new energy storage. Some studies have shown that hydrogen energy is expected to become an important form of energy storage and complement each other with electrochemical energy storage.
ideal solution
According to the data, hydrogen energy storage is generally divided into three situations. The first is the production of hydrogen by electrolysis of water with renewable energy; the second is the production of hydrogen by electrolysis, and then the use of hydrogen to generate electricity, including the application of fuel cell power generation to the Internet and hydrogen fuel cell vehicles in the transportation field; in addition, the hydrogen produced by electrolysis of water Synthesize methanol with carbon dioxide for storage, transportation and application. In other words, electrolysis of hydrogen is the source of the hydrogen energy storage industry chain.
Wind and photovoltaic power generation has intermittent and fluctuating characteristics. If wind and solar power generation is directly supplied to end users, it will cause frequent power outages or burn out electrical appliances due to excessive voltage. In order to solve the above problems, the power generation end uses a large number of battery packs to store electric energy, which can supplement power generation when the wind is weak, or choose to directly connect to the national grid, and use the smart grid to consume unstable power in time-sharing. However, industry experts pointed out that both cases have disadvantages such as high cost and technical difficulty.
"Hydrogen energy storage is a very ideal solution for power generation from unstable energy sources such as wind and photovoltaics. Hydrogen production by electrolysis of water can adjust the hydrogen production at any time according to the needs of the power system, and effectively utilize the low-quality, low-quality electricity that cannot be connected to the Internet in the process of wind and solar power generation. Zhang Lifang, general manager and professor-level senior engineer of Beijing Jiuantong Hydrogen Energy Technology Co., Ltd., said that this technical path has been verified by many projects and has been proved to be reasonable and effective.
"By building a special hydrogen production station and using wind and solar power generation to form a micro-grid for hydrogen production, the cost of hydrogen production will also be reduced due to the low electricity cost of abandoning wind and electricity." Zhang Lifang believes that many wind power plants are now being used in wind and photovoltaic power plants. It's a waste of money, and once put to use, it will be of great benefit.
Zhang Lifang said that in terms of efficiency, the efficiency of hydrogen energy storage is not the highest among all energy storage methods, but its future development potential is huge. In the entire industry chain, if renewable energy is combined with hydrogen energy storage, hydrogen energy storage will play an important role in using renewable energy to produce hydrogen through electrolysis and storage and transportation applications.
Significant advantage
According to estimates by the International Renewable Energy Agency, currently only 4% of the world's hydrogen comes from electrolysis of water to produce hydrogen, and the rest comes from coal, natural gas and petrochemicals. Under my country's energy structure rich in coal, lean in oil, and low in gas, the proportion of domestic hydrogen production from coal exceeds 60%, and the proportion of hydrogen production from electrolysis of water is less than 2%. The future development of hydrogen production from renewable energy is huge.
Zhang Lifang said that compared with the method of hydrogen production from fossil energy, the quality of hydrogen produced by electrolysis is very high, which is more in line with the requirements of fuel cell applications. Although the price of hydrogen produced by traditional methods such as coal-to-hydrogen is cheaper, it is not sustainable in the context of carbon peaking and carbon neutrality.
"Hydrogen energy storage is very different from other energy storage methods. First, as a secondary energy source, hydrogen can be directly stored, while electrochemical energy storage, at present, the energy density of direct electricity storage is not high enough, which is very important for the future. Second, the electrochemical energy storage efficiency is low, and it also faces the problems of high safety and unit energy cost, while the weight power density of fuel cells can reach 400 watts/kg, and the volume power density can reach 4000 watts/kg. , it is expected to reach 2000 watts/kg in the future, which is higher than 150 watts/kg to 200 watts/kg of lithium batteries, and its open system energy storage method makes the cruising range longer."
In Zhang Lifang's view, hydrogen can be stored and transported to achieve long-term, cross-season energy storage, and has a wide range of application scenarios in transportation, industry, and renewable energy. He emphasized that at this stage, hydrogen energy storage needs to be further optimized and improved in some technical nodes. For example, in the construction of electrolyzed water hydrogen production plants, considering the large fluctuations in power generation and voltage, efforts should be made to improve electrolysis equipment to cope with power grid fluctuations. Great technical and control strategy level.
seek common development
Although some power generation companies are interested in the hydrogen energy storage industry, they have many concerns about how to deploy, whether they can pay back their costs, and whether there are enough end users. Zhang Lifang believes that these worries are unnecessary. At present, the price of hydrogen in the country is 60-80 yuan/kg. If the wind and solar power is used reasonably and the electricity price is guaranteed to be cheap, the hydrogen price will be more competitive, and the cost price can reach 15-18 yuan/kg. With the large-scale application of hydrogen energy storage, the cost will drop very quickly, and the cost of green hydrogen will soon be equal to that of coal-to-hydrogen.
At the same time, Zhang Lifang pointed out that the initial equipment investment in the deployment of hydrogen energy storage is huge. In addition to wind and solar power generation equipment and point-of-sale hydrogen production equipment, the produced hydrogen also needs to be stored, boosted, and transported. Therefore, in the short term, hydrogen energy storage The development speed of energy storage will be slower than that of electrochemical energy storage, and the subsequent industrial process requires the joint progress of all links, improving infrastructure and reducing costs.
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