Automotive Black Technology Chapter 1173: ：Time waits for no one!
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Zhengxin Dynamics Company has been divided into two.
In order to ensure the research and development of new submarine power, 920524 sent a large number of R&D engineers to cooperate with Zhengxin. In order to keep the research and development projects confidential, the military and national security departments have also deployed a large number of manpower.
In view of the company's other R&D projects, Li Fanyu had no choice but to order the divestiture of the power company's existing business, set up a separate R&D department specifically responsible for submarine power, and freed up the Zhengxin Industrial Base. A processing workshop is solely responsible for the trial production of test parts.
In just over half a month, Li Fanyu had already completed the pump-jet propulsion system and motor part of the Han-class attack nuclear submarine and the Kilo-class conventionally powered submarine with the efforts of himself and his team.
This aspect of permanent magnet motors is a piece of cake for Zhengxin, who has mastered the core technology. The motors used in cars and submarines are essentially the same, the only difference is the output power.
But even so, Li Fanyu further optimized the design of the Zhengxin LS rare earth permanent magnet motor with an expanded volume and power version. Making it quieter and more energy efficient.
In fact, although the structure of the Han-class nuclear submarine is relatively more complex, it is relatively easy for Li Fanyu. After all, there is no need to make major improvements to the entire power system. It only needs to change the power of the cooling pumping system embedded in the nuclear reactor like an artery from a noisy diesel engine to an electric one.
What is more troublesome is the Kilo-class conventionally powered submarine.
Although Li Fanyu’s proposal is to add fuel cells to the Kilo-class, this does not mean that the power of the submarine is completely supported by fuel cells.
The space inside a submarine is limited, the gas storage tank required for the fuel cell takes up a large volume, and the storage conditions are harsh. It is impossible to support the long endurance of the submarine.
What Li Fanyu means is to change the driving method of the Kilo-class submarine to the same as that of the fifth-series sedan; it is divided into silent mode and maximum speed mode.
In silent mode, the submarine's power source switches to a fuel cell. The lower output power allows the submarine to submerge in a lower noise state.
When the submarine needs speed, switch to a closed diesel engine. Provide greater output power and higher speed for submarines.
As for closed diesel engines, the Zhengxin Poseidon series can do the job with slight modifications.
At present, the first version of the fuel cell has been successfully tested. In terms of power generation effect, it can only be described as sour.
The problem now facing Li Fanyu is that during the first simulation test, the stability of the two gas storage parts did not meet the requirements;
The principle of fuel cell technology is actually to reverse the reaction of electrolysis and water splitting. In this reaction, a large amount of hydrogen and oxygen are needed.
In order to ensure sufficient battery life and maximum output power, it is necessary to build two liquid storage tanks that occupy a large space. Oxygen is easy to say, but the storage technology requirements are relatively low. But hydrogen is not easy to deal with.
As a consumable fuel, hydrogen can only be stored in liquid hydrogen in a submarine. The storage conditions of liquid hydrogen are much more stringent than those of oxygen!
As we all know, liquid hydrogen is a mixture of parahydrogen and orthohydrogen.
The chemical properties of parahydrogen and orthohydrogen are exactly the same, but their physical properties are different. The specific performance is that the ground state energy of parahydrogen is much lower than that of orthohydrogen.
The equilibrium mixture of normal and parahydrogen at various temperatures is called equilibrium hydrogen.
The equilibrium concentrations of normal and parahydrogen change with temperature below 273k. The equilibrium mixture of normal and parahydrogen with a temperature above 273K is called normal hydrogen, which is composed of 75% normal hydrogen and 25% parahydrogen.
When hydrogen is liquefied and stored, due to autocatalysis, normal hydrogen will be converted into parahydrogen and release heat, causing evaporation loss of liquid hydrogen. Therefore, the parahydrogen content in liquid hydrogen products is required to be at least 95%.
In other words, when hydrogen is liquefied, basically all orthohydrogen needs to be catalytically converted into parahydrogen. Moreover, during use, the parahydrogen content ratio in the storage tank must be ensured at all times.
Although Zhengxin has accumulated a lot of technology, Li Fanyu was still troubled by such a partial technology that was not related to mechanical design.
If it weren't for this, I'm afraid the entire set of power equipment would have entered the installation and testing phase.
But even so, Zhengxin’s research and development progress still stunned the developers of 920524!
It only took more than half a month to bring the research and development progress to this level. Zhengxin’s research and development strength has made many 920524 engineers doubt their lives.
Of course, including Xing Yaxin.
In the R&D room of Zhengxin Power, which had been heavily protected by the national security, Xing Yaxin came to Tiancheng again after half a month. He simply couldn't believe his eyes.
In front of him, a complete set of pumping propulsion systems and fuel cell technologies were laid out, along with a large amount of detailed and effective simulation test and assembly test data.
"My dear! Director Li, do you know what you have done?!"
“Oh my God, we have been coveting the pumping propulsion system for ten years! However, in the process of independent research and development many times, we have encountered technical difficulties that have not been overcome in the past. You have actually made it now! You have made it Done! ”
"And this fuel cell! Seven years ago, we were inspired by the French API submarine power technology and tried to develop it. However, after investing more than 10 million in research and development expenses, the final results were unsatisfactory and ended in abortion. ,"
"And this motor!"
……
Seeing Xing Yaxin excitedly pointing out the research and development results like a country bumpkin who has never seen the world, Li Fanyu felt a little sad.
China's submarine research and development is basically embroidery on sack films - it's not that the work is bad, but that the foundation is too poor.
There is no accumulation of war experience in the war, and the overall domestic industrial level cannot keep up with the speed of changes in weapons technology. These are the main reasons.
Li Fanyu patted the bumpkin Xing with a sour nose, "Come on, Director Xing. You have plenty of time to appreciate the results. Let me tell you about our current difficulties first."
Xing Yaxin frowned when Li Fanyu truthfully informed him about the shortcomings of fuel cell storage technology.
Just when he was about to say something, his phone rang.
Xing Yaxin looked at the number displayed on his phone, made an apologetic gesture to Li Fanyu, and trotted out.
After a while, he walked back quickly with a sullen face.
"What's wrong?" Li Fanyu asked when he saw that his expression was wrong.
"The naval base of the Monqi Kingdom is organizing a large-scale military exercise! With ulterior motives, they are showing off their power! The South China Sea Fleet has been ordered to fully station in the waters of Apo Reef Island in the near future to prepare for emergencies!"
"Huh?" Li Fan was stunned when he heard the news, "But the South China Sea Fleet's submarines currently have three submarines..."
Xing Yaxin nodded, "So, we must be fast! I didn't dare to think about it before, but now that I have seen your progress, I have confidence in you!"
"Hey," Li Fanyu slapped his thigh, "but we can't defeat the current liquid hydrogen storage technology!"
"Don't worry about this, just do other things."
"Who is it?" Li Fanyu asked blankly.
Xing Yaxin smiled mysteriously and walked out of the door without explaining, took out his cell phone and called the general assembly.
"Please contact Jiuquan for me!"