"Of course, it's more than that" Zhang Lan nodded, nodding, and didn't feel uncomfortable at all because of the change in Zhang's tone, to be honest, because he couldn't find a suitable partner for Kan Dashan. Zhang Lan was about to go crazy.

It may be said, how can it be that no one has said it? Little Dawn, Alice, Jill, Marlene, Elaine, Reeves, Tom and Cruise. Isn't all of them suitable for Zhang Lan to talk to, but the fact is diametrically opposite, every time Zhang Lan talks to them about a certain type of weapon, these guys can tell them the advantages and disadvantages of these weapons in a few words, and then belittle these weapons as useless.

The beauty of Kan Dashan is in the process of continuous discovery when everyone is talking to each other, and what they are looking for is the kind of guidance Jiangjiang. The feeling of passionate words, if you say the advantages and disadvantages directly in one sentence, then what else does it mean? Over time, Zhang Lanying stopped talking to them about these issues.

It can't be helped, it's so devastating to talk to these guys about these issues. Every time I talk to them about this topic, Zhang Lan always feels like a useless idiot, and now that she meets a suitable object, Zhang Lan of course has to talk about the words that she has been holding in her heart for a long time.

There is a saying called "I haven't seen a woman for three years, and when I see an old sow, I also think that it has clear eyebrows" You can completely think about what state Zhang Lan, who can't find Kan Dashan's object, is in his heart now! Zhang Lan, a boy who was suffocated, finally found a suitable Kan Dashan to Sang, probably in Zhang Lan's eyes now, Zhang Dingjun, the commander of the North Sea Fleet who is not handsome, is really more beautiful than the old sow with clear eyebrows, you don't expect him to have high requirements, whether this aspect of being held back is psychological or psychological.

"The specific energy of fuel cells is higher than that of lead-acid batteries. However, the specific power is only half that of lead-acid batteries. About four watts, kilograms. This determines that the hybrid system composed of fuel cells and Mingzhu batteries has greater advantages. In order to increase the underwater one-time endurance by 4 times, if the battery is used alone, the amount of the battery must be expanded to a number of times, which is obviously the overall non-running of the submarine; The use of fuel cells only needs to add one cabin, which greatly saves the overall weight and space of the submarine. Similarly, if there is no Ming battery, the fuel cell will be insufficient when the submarine requires high speed. ”

"Well, this is based on the current situation of the existing submarine Ming acid battery, and if the traditional Ming acid battery is replaced by a lithium-ion battery, the effect is much better." Zhang Lan added, this kid. At this time, this guy still does not forget to advertise his products.

Listening to Zhang Lan's added words, Xiao Chenxi and Alice, who were sitting on the side and listening to the two of them, couldn't help laughing: This kid doesn't forget to sell his own things at any time, if you let this kid be a salesman to run business, maybe this kid is still a business master.

Zhang Dingjun was stunned, and he couldn't laugh or cry. Because he really didn't expect that Zhang Lan, this kid, would still be obsessed with their company's lithium-ion battery, which advertisements Zhang Dingjun hadn't paid attention to before, but this time Zhang Lan's advertisement Zhang Dingjun really saw it: this kid really deserves to be from the Zhang family, and he never forgets to advertise his own products.

"Gone? Anything else? After Zhang Dingjun understood for a moment, he finally shook his head and asked.

It's just that this guy's somewhat silly expression looks a little funny at the moment. If Zhang Dingjun thought that Zhang Lan was a simple military enthusiast before, then now Zhang Dingjun has to revise Zhang Lan's evaluation.

These information jing, not a military enthusiast can grasp, not a person with a connection with the fuel cell industry, is the plan will never know these information and data, and can record these data so clearly now there is no Baidu God and Gou God, want to find these information? If you go to the research institutes, you may not even be able to find them in the library.

"Yes" Zhang Dingjun did not expect, Zhang Lan nodded very honestly, "That is, the service life of fuel cells is relatively short." Because the current fuel cell technology is immature, and there is no suitable proton exchange membrane, so the current fuel cell service life is only about 2 energy hours on average, if the existing fuel cell proton exchange membrane manufacturing technology is more mature, can produce a more excellent proton exchange membrane, so that the fuel cell service life reaches more than one concave hours, then the fuel cell as one of the four technologies, will be more powerful. ”

This is not what Zhang Lan said to play, but it is true. In Zhang Lan's impression, when the time entered the injury year, domestic scientific research institutions have researched a proton exchange membrane with a service life of several hours, and the efficiency is nearly 30% higher than that of the previous proton exchange membrane.

Stimulated by this technology, the domestic military's submarine research and development has ironically studied four submarines. In addition to constantly using the "Song"-class submarine as a dumb brother. These technical maniacs did not even let go of the "Yuan" class conventionally powered submarines that had just been launched at that time, and there was already news from more than one channel that the mainland's naval equipment research and development department had installed a curved module on the "Yuan" class conventional-powered submarines so that they could be turned into fuel cell diesel-electric hybrid conventional submarines.

Of course, Zhang Dingjun will definitely not know about these materials.

Zhang Dingjun nodded, in addition to the relatively low power of the current fuel cell, this is also one of the bottlenecks that the current fuel cell level restricts its use as a power source alone, if the fuel cell is used as the only power source for the submarine as in the era of Tian in the last century, then such a short service life cannot be used for the submarine. However, when it is used to extend the underwater dive trip, the situation is different. For example, the fuel cell submarine that Germany is undergoing technical tests: the Jin submarine, a submarine blade scraping, time. Then the existing fuel cell can meet more than 8 times of underwater diving, you should know that the submarine will only appear when necessary, and this kind of long-term one-time submarine is not usually needed.

Zhang Dingjun also had to admit that this kid was on the point this time.

"The second is the high manufacturing cost of fuel cells, which is also an important factor limiting fuel cells from entering the market." Zhang Lan crossed his fingers to count the shortcomings of fuel cells under the existing technical conditions, "From the perspective of existing experimental cars abroad, a fuel cell vehicle is almost twice that of an ordinary car, and our company is about this level, I believe this ratio is also the same in your military's experiments." It could even be higher. It is precisely because the submarine fuel cell mail system is used at the critical moment of necessity, and from the German test, the storage capacity of the fuel cell four-port system is about one-tenth of the total storage energy of the submarine. Zhang Lan gave a thumbs up to show that it was one-tenth. Thus although the cost of fuel cells is high. ,

But you can't just look at this "From the perspective of long-term cost-effectiveness, it is cost-effective to use fuel cells to form a Han system on submarines, because it is a backup means, so the power requirements can be slightly relaxed, and if its strategic value is taken into account, it is much higher." ”

As for Zhang Dingjun nodding secretly in his heart, he had to admit that what this kid said made sense. If it is a wartime, how much of a threat does a curved submarine that can remain underwater for a long time pose to the enemy's aircraft carrier battle group? If there are several submarine submarine battle groups quietly attacking the place of the aircraft carrier battle group, then the strategic significance is no longer measurable by money, in a sense. It can even affect the balance of the war, speed up and delay the victory or defeat of the war, and do not forget that although the cost of the post submarine is high, it is still much cheaper than the cost of the nuclear submarine!

If this kid were a soldier, he would be a good commander, right? I don't know how. Such an idea suddenly popped up in Zhang Dingjun's heart, but in a blink of an eye, this idea was thrown to the back of Zhang Dingjun's mind: Even if they wanted to, would their Zhang family be willing to let their lone seedling become a soldier?

"In addition to this, there are issues such as the safety and reliability of fuel cells, which are also issues that need to be addressed by existing fuel cell technologies. Well, that's basically all there is to it. Zhang Lan finally added unsatisfactorily.

Zhang Dingjun felt that his nerves were a little numb. Jun shook his head and couldn't help but smile bitterly, "Originally, I was a little hesitant, thinking that it was a good idea to cooperate with you, but now it seems that I can't help but revise my opinion, except for you, I really can't find a more suitable partner to cooperate."

"Hehe, Zhang Lan scratched his head, looking modest, in fact, this kid is very angry in his heart now: not everyone can make the dignified commander of the North Sea Fleet so shocked.

As for Xiao Chenxi and Alice, the two little girls. is a little uncontrollable with a direct smile: This little guy really gives himself a long face!

"Okay, let's stop here for this discussion, take a good look at the experimental project book this time, I can tell you, this time I put the treasure on you." Zhang Dingjun nodded and nodded in military uniform, relying on the old and selling the old, it seemed that he was not discussing this issue with Zhang Lan, but in fact, this guy was a little stunned by Zhang Lan, and needed time to clear his mind: they are also children. Why is there such a big gap between that little cub in his own family and this kid?

Zhang Lan carefully read the project book, this modification project is to modify the battery system of a decommissioned submarine, the military put forward the specifications and performance requirements of the lithium-ion batteries used in these modifications, and Alice Group is responsible for meeting the requirements of the fuel cell.