It may only be a matter of time before hydrogen energy battery vehicles are "on the road" in large quantities
As an environmentally friendly and green new energy, hydrogen energy is increasingly recognized by the market.
However, there is still much room for exploration in both the preparation and storage of hydrogen.
A few days ago, a study by Chinese researchers was publicly released. By building a new type of photothermal system, the production efficiency of hydrogen energy has been increased by 6 times.
In the future, we may still be able to drive on the highway with a hydrogen energy private car.
Yangzi Evening News/Ziniu News reporter Yang Tianzi
Daxian
skill
Hydrogen energy can make manned passenger cars run
Can also "push" rocket launches
Many people's concept of "hydrogen" is really light, as long as it is filled into the balloon, the balloon will float up immediately.
But when needed, "hydrogen" can also be "heavy", allowing passenger cars to run.
Zhang Kai, an associate researcher at the School of Energy and Power at Nanjing University of Aeronautics and Astronautics, told reporters that at the Beijing Winter Olympics, green and environmentally friendly hydrogen energy "showed its potential". Not only did the main torch burn with hydrogen energy, but even the passenger cars on the field used it. Hydrogen fuel cell.
According to the data, 710 hydrogen fuel cell vehicles will be put into the Zhangjiakou Division of the 2022 Beijing Winter Olympics.
During the entire Winter Olympics, a total of more than 1,200 hydrogen fuel cell vehicles were in operation, the largest number in the Olympic history and the largest number serving the Winter Olympics.
"Actually, during the 2008 Beijing Olympics and the 2010 Shanghai World Expo, hydrogen fuel cell vehicles have already started 'on duty'," Zhang Kai told reporters.
"Used in the aerospace field, it can even 'promote' the launch of rockets." Zhang Kai told reporters, "Liquid hydrogen and liquid oxygen are important components of aerospace fuels, which are not only environmentally friendly, but also have large thrust. It's a good propellant."
In our daily life, hydrogen energy has also gradually "landed", "For example, in industrial production, hydrogen is an indispensable raw material. In many fields such as agriculture, beauty and health, hydrogen can also play an important role. effect."
main
Features
Green and environmentally friendly, but the preparation cost is too high
Zhang Kai showed a set of data to reporters: As the most widely distributed substance in the universe, hydrogen has the characteristics of high combustion calorific value, which is 3 times that of gasoline, 3.9 times that of alcohol, and 4.5 times that of coke.
The product of hydrogen combustion is water, so it is the cleanest energy source in the world with abundant resources and sustainable development.
Wang Hewu, executive dean of the Hydrogen Energy Research Institute and associate professor of Tsinghua University, once interpreted the large-scale use of hydrogen energy: ideally, 1 kilogram of hydrogen can replace the consumption of about 5 liters of diesel and reduce carbon dioxide emissions by about 15 kilograms.
Compared with traditional fuels such as diesel and gasoline, hydrogen eliminates the emission of pollutants such as particulate matter and nitrogen oxides.
In the long run, it will have a considerable impact on reducing the greenhouse effect.
However, Zhang Kai told reporters that most of my country's hydrogen energy is currently extracted from fossil raw materials, and there are three "difficulties": high cost and high energy consumption, technical bottlenecks, and lack of sustainable development models.
up to date
Research
Build a new type of solar thermal system
Hydrogen energy production efficiency increased by 6 times!
The latest research by researchers from Hebei University found a breakthrough in the efficiency of hydrogen energy production.
A research result recently published in "Nature Communications" by Li Yaguang's team, a researcher at the School of Physics, Hebei University, shows that by building a new type of photothermal system, the average daily hydrogen production in a 6-square-meter normal light area can reach 23.27m3, which is expected to achieve large-scale outdoor sunlight. Drive methanol reforming to produce hydrogen.
"The new type of photothermal system built by researchers, the key to improving the efficiency of hydrogen energy production lies in a special membrane." Zhang Kai made an analogy with the most familiar solar water heater for readers, "In an ordinary solar collector tube, the solar Light passes through the glass tube and is absorbed by the black film coated on the outer wall of the hot water pipe, which is then converted into heat, but the black film itself also emits long-wave radiation in the near-infrared band, resulting in a loss of some of the absorbed solar energy."
In this new type of photothermal system, this special film can efficiently absorb solar energy and convert it into heat, and at the same time, its radiation capacity in the near-infrared band is significantly reduced, thus greatly improving the conversion and utilization of solar energy, making the system at a lower The irradiation reaches a very high temperature, which accelerates the splitting of methanol and water, and realizes the efficient preparation of hydrogen energy.
According to the published data, the hydrogen production efficiency of this novel photothermal system is 6 times higher than the photocatalytic hydrogen production efficiency reported in the literature.
Outlook
future
After reducing costs, hydrogen fuel cell vehicles may become popular
Such a picture can be imagined. The future "gas station" will be upgraded to a "hydrogen refueling station". Citizens drive hydrogen fuel cell vehicles into the "hydrogen refueling station" to fill the hydrogen energy high-pressure gas tank of new energy vehicles with hydrogen energy. , kick the accelerator, and hit the road again.
"At present, our country's scientific research workers and some automobile manufacturing companies have been working hard on the research and development of hydrogen fuel cells. In the future, we have to overcome the cost of hydrogen energy production. Once the cost is reduced, hydrogen fuel cell vehicles are really promising. Walk into an ordinary family." Zhang Kai said.