show earlier in Guangzhou, Honda will debut Clarity hydrogen fuel vehicles, for a time attracted many users crowd and hot. “Hydrogenation three minutes endurance 750 km, -30 degrees Celsius environment can also be used” simple words but revealed more than 20 cars are equipped with this advanced technology. Many people believe that, compared to electric cars, hydrogen fuel cells are the future of new energy sources. But there are also many people worried about security, even the evil quipped: “fried up people fly 10 meters high.”
In addition, some users still think of the early years of the more popular natural gas vehicles, confuse the difference between the two. It seems as compared to broader applications have electric vehicles, hydrogen fuel cell vehicles is also covered with a veil. Today Xinjiang brother of this article is to sort out doubts and answer them for everyone.
1, hydrogen fuel cell vehicles What is?
and hydrogen fuel cell vehicles currently available electric, hybrid plug as are attributed to the new energy. Although many car companies are in development, but the world’s real production and sale of only three, namely Toyota Mirai, Honda Clarity and modern Nexo.
Toyota Mirai
Honda Clarity
Modern Nexo [123 ]
Let simple understanding of the working principle of such vehicles: the hydrogen tank to the fuel cell hydrogen gas flow which, after the chemical reaction into electrical energy to power the motor, and then by transmission, drive bridges driven vehicle.
In fact, we know it and electric cars, ultimately by electrical energy into mechanical energy. The biggest difference between the two is: the electric vehicle needs to be charged, and hydrogen cars hydrogen filling is required.
Question 1: “Nanyang water hydrogen car” is a hydrogen fuel car?
had created a hubbub of “Nanyang water hydrogen car,” surely we have heard, in order to show intelligence, said to be run on water, but it’s actually true principle is: After adding water, the water will and aluminum powder, catalyst and other reactions, and then generate hydrogen, and then through the stack to generate electricity, and finally driving the vehicle.
In essence it is really we talk about hydrogen fuel cell vehicles, but it do not add hydrogen, but by self-sufficiency. Sounds nice, but the need to address technical issues such as the separation of aluminum powder, difficult, costly and not environmentally friendly, lead a group of ridicule is for this reason.
Question 2: natural gas vehicles and hydrogen fuel vehicles What is the difference?
natural gas vehicles is also known dual-fuel vehicles, in fact, in addition to the original gasoline fuel supply system, adds a CNG (compressed natural gas) supply system, or by controlling the switch, to select the burning oil to burn gas. It and hydrogen fuel vehicles, compared There are three main differences:
a difference: not a new natural gas energy
natural gas belong to conventional energy sources, and conventional energy refers to the widespread use of long-term, technically more mature energy, such as coal, petroleum, natural gas vehicles so does not belong to new energy sources, or post-combustion carbon dioxide and other pollutants will occur.
Difference between the two: a lower cost of natural gas
The natural gas can direct extraction, Common metal can body can be stored, generally placed in the trunk of the car. And processing the hydrogen required is obtained, and its chemically active, low density, higher technical cylinder, so the cost of natural gas is lower than the hydrogen fuel automobile.
distinguish three: different dynamic forms
natural gas vehicles can either burn gasoline, you can also burn natural gas, power principle with ordinary fuel vehicles is the same, the natural gas is introduced into the cylinder for combustion drive vehicle. However, hydrogen fuel cell vehicles generate electricity using hydrogen and a catalyst, operated by an electric drive motor, like electric cars.
The biggest advantage of natural gas vehicle fuel is cheap, in view of this, some car companies will also introduce natural gas version in some low-end models for consumption to choose. As for private modification, a few years ago really fire at the taxi industry, but because of different levels of modification will affect the life of the vehicle, and slowly the light down, and now have begun to limit this policy “gas instead of oil.”
Question 3: Why hydrogen fuel vehicles respected?
In fact, natural gas alone as a traditional fuel, does not belong to this new energy, natural gas vehicles is destined not much to speak of prospects. Turning back to our hydrogen fuel, compared to the increasing popularity of electric vehicles, hydrogen cars are currently very few areas in the home, but why do people still respected?
The main reason is that it poke in the moment two major pain points of electric cars, such as Honda production of hydrogen fuel cell vehicles Clarity, plus hydrogen 3 minutes, mileage 750 km, the charging time and mileage, the vast majority of the current spike all electric vehicles, and in a cold environment will not affect the normal use of the vehicle.
4 questions: Why did the popularity of hydrogen cars?
Since the electric car’s weaknesses is precisely the strengths of hydrogen fuel vehicles, or why it can not be universal? There will involve three major pain points of its own existence.
Jiang brother said point image, a real road hydrogen fuel cell vehicles, mainly related to the five steps: preparing a hydrogen – Hydrogen storage Yun – hydrogenation station – hydrogen charging car – cars. The latter two aspects has been said, is its advantage. But before the three links is real weakness.
(1) Preparation of hydrogen
need to consider the fuel vehicle fuel costs, electric cars need to consider electricity, and hydrogen cars need to be considered a “hydrogen fee.” Although the current domestic take of hydrogen technology has matured, but because the market is too small amount of demand, so prices have been stubbornly high.
(2) hydrogen storage
after
Preparation of hydrogen well, it needs to be transported to a dedicated refueling station, but the volumetric energy density of hydrogen low and flammable, this time you need to compressed or liquefied hydrogen, but such hydrogen storage tank is not only high costs, technical requirements are very strict.
(3) refueling station
Power source of hydrogen fuel cell vehicles rely hydrogen refueling station, but as of 2018 late last year, our operating hydrogen refueling station is only 23, so the size and charge pile, compared to the gas station, could not bear to look. And the construction of a high-pressure hydrogen refueling station also need to invest 1000-1500 yuan.
question 5: hydrogen fuel vehicles in the end it safe?
hydrogen is very expensive, high storage technology requirements, inadequate infrastructure, these shortcomings are a lot of people’s consensus, but there are still about hydrogen cars a controversial issue: Is it secure enough? The current mainstream view is divided into two factions:
Opposition: hydrogen fuel vehicles “mobile bomb.”
in China, the hydrogen is defined as hazardous chemicals, but in most people’s concept of education, hydrogen is a colorless, odorless, flammable gas. The military also have Armageddon of “hydrogen bomb”, based on these traditional impression, a lot of people for the safety of hydrogen vehicles is very scruples.
Norway’s hydrogen refueling station explosion
In addition, several hydrogen explosions recently in Norway, the United States, South Korea spate, but also gives you more “talk hydrogen pale. ” This is actually worried about the electric car on fire with everyone is a reason, but a deeper extent.
Supporters of: hydrogen fuel car is safe enough
based on public concerns, many experts or car prices stood out, in their view, hydrogen is not as we imagined dangerous, and based on current technology, hydrogenFuel vehicles are safe enough.
Expert: hydrogen own degree of danger less than petrol
The diffusion rate of hydrogen was 3.8 times the gas, which makes the leakage the hydrogen will quickly rise to the rapid diffusion in all directions, concentration is difficult to achieve the desired concentration explosion. In addition, the explosive energy of hydrogen is the lowest common gas, gasoline is only 1/22. Combining these two points, the degree of danger of hydrogen itself far less than gasoline.
Toyota: fuel cell vehicles and regular cars as safe
As the first relates to the field of hydrogen fuel, and the world’s first mass production Toyota’s hydrogen fuel for cars Mira, it stressed that ordinary cars and fuel cell vehicles as safe, but it’s confidence, mainly from several security technology.
For example, in the hydrogen tank, to prevent it from striking leakage, Toyota using carbon fiber and Kevlar ballistic materials bonded body, it is said to be able to withstand the weight of external 140Mp bullet unbreakable 80 km per hour hit can not destroy it.
In addition, in order to avoid the hydrogen tank due to the heat resulting in increase in air pressure tank, causing an explosion. Toyota the hydrogen tank also designed a special cylinder valve, when the vehicle is on fire, the valve will open of its own sensed temperature, the mandatory exclusion of hydrogen. And how much is how much you burn hydrogen discharge, like gas stove burning gas, deflagration will not happen, will not explode.
Modern Nexo: five-star safety standard
In fact, the current production of three fuel cell vehicles, the only modern Nexo He accepted the European new car safety evaluation Association (Euro-NCAP) crash test. From the results of view, the new car not only get a five-star rating, but the key is the case of the hydrogen storage tank leak did not occur after the collision, which also provides evidence for the safety of hydrogen vehicles.
standing neutral point of view, on the one hand, it is Jiang brother can understand those who “talk about hydrogen pale”, after all, limited awareness, everyone hydrogen fuel for cars there are still many do not understand, fear the unknown, this is normal. But some people, in the face of hydrogen fuel vehicles, completely ignoring the fact that arguments will only take “bomb” to alarmist, this is not desirable.
On the other hand, car prices are for the experts or the science of safety, Xinjiang brother or conservative views, after all arguments moment can provide it too little, it will inevitably fall into the “blowing his own trumpet,” the stereotypes. But also from the whole industry chain, the safety risks of hydrogen fuel vehicles is indeed bigger than fuel vehicles and electric vehicles, can not be generalized.
written in the last
with the exception of Toyota, Honda and Hyundai, BMW, General Motors and other manufacturers are also many research hydrogen fuel cell technology, BYD, Geely, Great Wall and other independent brands have such programs domestic policy is to encourage and support research and application of this technology. So from the foreground, it is still there.
At the same time, however, hydrogen-fuel vehicles there are also many problems to be solved, just as the emerging electric car, it also may not not faced questioning from the public. So for hydrogen fuel vehicles, and everyone is how to treat it?