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Today is different

To understand Nuzama's surprise, we need to start with the technology of the gas turbine."

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Many people know that steam engines use fuel to boil water, produce water steam, and then use water steam to push the piston to perform work, converting heat energy into mechanical energy. The principle of a steam turbine is to turn the piston in the steam engine into a group of impellers. The high-temperature and high-pressure steam passes through the impeller, which will cause the impeller to rotate, which can also generate mechanical energy and drive the generator to generate electricity.

The biggest disadvantage of steam engines and steam turbines is that the process of heating water with fuel will cause certain energy loss, thereby reducing the thermal efficiency of the equipment. If the process of boiling water is eliminated and the impeller is directly used to push the impeller with high temperature and high pressure gas, the thermal efficiency of the entire equipment can be effectively improved, thereby achieving energy saving, economical, environmental protection and other requirements. This equipment that uses high temperature and high pressure gas to push the impeller is called a gas turbine.

Compared with steam turbines, gas turbines have other advantages. One is that the volume of the entire equipment can be smaller due to the elimination of steam circulation systems, so that it can be installed on ships, aircraft and some other equipment as the main engine of the equipment. The other is that the gas turbine starts much faster than the steam turbine and is often used as emergency power.

Gas turbines also have their weaknesses, that is, the temperature of the gas is much higher than the temperature of the steam, which puts strict requirements on the material of the impeller. The temperature of the water vapor is related to pressure. Under normal pressure, the temperature of the water vapor is only 100 degrees. Even under the so-called "supercritical" conditions, the water vapor is pressurized to 250 atmospheres, and the temperature is about 600 degrees. Such a temperature is still far lower than the melting point of ordinary metal materials, so it is enough to use ordinary metals to make the impeller.

Gas turbines are different. Since water vapor is not used as a conductive medium, but directly use high-temperature gas to perform work, the gas temperature in the gas turbine often reaches more than 600 degrees. Scientists have found that the higher the gas temperature in the gas turbine, the higher the thermal efficiency of the equipment. Therefore, continuously increasing the gas temperature in the gas turbine becomes the key to improving the performance of the gas turbine.

Since the 1950s, gas turbine technology has gone through three stages, which can also be called the third generation of gas turbine technology. The characteristics of the first generation of gas turbine technology are that the gas temperature is between 600 and 1000 degrees, and the thermal efficiency of simple circulation is between 10% and 30%. Read h-u-n mixed*h-u-n mixed*small-say-network

Please remember that the second-generation gas turbine technology refers to the gas initial temperature reaching between 1050 and 1370 degrees, and the thermal efficiency of a simple cycle is between 32% and 40%. Around 2000, some manufacturers represented by General Motors proposed the third-generation gas turbine technology, which can reach between 1400 and 1500 degrees, and the thermal efficiency will be further increased to more than 40%. What alk recommends to Nuzama is the third-generation gas turbine technology it developed, with the initial temperature of gas reaching 1450 degrees, which does represent an international first-class level.

There are many technical difficulties in increasing the gas temperature of the gas turbine. The most important one is the choice of blade materials. The melting point of ordinary steel is about 1500 degrees. If ordinary steel is used to make the impellers of the gas turbine, then in the 1450 degrees of gas, these impellers will be as soft as cooked noodles and will not work normally at all. Therefore, whether a gas turbine with higher gas temperatures can be made largely depends on whether it can produce high-temperature-resistant materials.

The preparation of high-temperature materials requires another lengthy text to introduce, which involves powder metallurgy technology, high-pressure forging technology, etc. Modern industry can be said to be linked together, and any technological breakthrough requires the entire industrial system to support it. In the 20 years of reform and opening up, China has accumulated technology and equipment in all aspects with great difficulty. Now it is finally confident to compete with its international peers.

Hanhua Heavy Industry has been engaged in gas turbines for eight years. The leader is Zhang Yihua, who is a aviation engine. Hanhua's original purpose of this project was to provide marine hosts for naval ships. For this reason, Liu Xianghai also specially introduced Bres, a famous gas turbine expert from Ukraine to provide technical guidance.

Lin Zhenhua invested huge amounts of money in the gas turbine project, and the results achieved were also very gratifying. Three years ago, Zhang Yihua took out the 300,000 kilowatt gas turbine for ships, and was accepted by the Navy to apply it to a new domestic destroyer. Last year, the 600,000 kilowatt gas turbine for ships was also successfully tested and is currently preparing to be used in the 50,000-ton conventional-powered aircraft carrier that Liu Xianghai and the others are building.

While developing marine gas turbines, the team led by Zhang Yihua also developed various gas turbine products for ethylene compressors, central air conditioners and power plants, and their performance indicators reached the international first-class level. This time, Lin Zhenhua went to the Frankfurt Equipment Exhibition, and gas turbines were one of the products he planned to focus on selling. Because of this confidence, he was not afraid of Nuzama's arrogance.

"Mr. Nuzhama, please don't look at Chinese products with an old eye. There is an old saying in China, "The Yangtze River pushes the old waves. Western companies such as alk have indeed been ahead of us in technology, but more than ten years have passed, can't we catch up?" Lin Zhenhua said to Nuzhama.

Nuzama shook his head half-doubtedly and said, "I'm sorry, Mr. Lin, I'm not convinced by your point of view. What reason do you have to believe that your skills can surpass alk? You know, while you are moving forward, they are also moving forward."

Lin Zhenhua said: "I just need to give an example and you will understand. The world's largest 80,000-ton die forging machine is currently in China, and it is in our Hanhua Heavy Industry Group. As for alk, it does not even have a 30,000-ton die forging machine. Its powder metallurgy impeller will be shipped to the United States for processing. In fact, we are moving forward, and they are still standing still."

"This..." Nuzama was speechless.

Nuzama was able to become the deputy director of the Ministry of Industry of Goma, so he naturally had several brushes. He knew that the mainstream technology for manufacturing high-temperature materials today is powder metallurgy technology, and an important step in the powder metallurgy process is high-pressure die forging, which requires the forging of metal powder under a tens of thousands of tons of die forging machine for forging. The pressure of the die forging machine directly affects the level of powder metallurgy technology. As Lin Zhenhua said, Alk does not have its own large die forging machine. Many of its powder metallurgy parts need to be transported to the United States and used the 45,000-ton die forging machine in the United States to forge.

Due to the lack of its own large die forging machine, it is difficult for alk to make technological breakthroughs in powder metallurgy. The blade materials of the third-generation gas turbine it manufactures currently use the technical patents of General Motors, which is one of the technical bottlenecks of alk.

Hanhua Heavy Industry built the world's first 80,000-ton die forging machine a few years ago. With this die forging machine, Hanhua's technicians can conduct experiments on powder metallurgy materials as they please, which has led to a blowout breakthrough in Hanhua's research on powder metallurgy materials. Lin Zhenhua's sister Lin Fanghua is now the director of the Materials Laboratory of the Mechanical Department of Huaqing University and a well-known materials scientist in the world. Many of her experiments were done with Hanhua's 80,000-ton die forging machine, which is a condition that her international peers cannot obtain.

The difference between scientific research and metaphysics is that scientific research is actually regular. As long as you do everything you should do, you can achieve corresponding results. The difference between a strong and a weak country lies in the different conditions of each. In the past, the experimental conditions of Chinese universities and research institutes were far less than that of Western countries, and the scientific research funding was pitifully small. How could scientific researchers produce excellent results just by writing and calculating in the library?

The situation is very different now. China's national strength has increased and its investment in scientific research has been increasing. Many foreign experimental conditions have been gradually equipped in China. Some experimental conditions that cannot be met by foreign countries can also be provided. In addition, sufficient scientific research funds have been invested in, and various achievements have naturally broken through the ground like bamboo shoots.

Seeing that Nuzama was silent, Lin Zhenhua no longer forced him. He took out a set of information and handed it to Nuzama, and said, "Okay, this is the technical information of the gas turbine provided by our Hanhua Heavy Industry, as well as the information of the generator set of Xingbei Heavy Machinery. Mr. Nuzama can use it to study it again. If you are interested in comparing these information with Alk's products, we will not object."

"Thank you, Mr. Lin." Nuzama took the information and withdrew from the negotiation room with Murabi with embarrassment. He could vaguely feel that what Lin Zhenhua said to him should be true and reliable. If Hanhua's products can indeed reach the technical level of alk and the price is as cheap as ever, then he really has no reason to refuse.

Harole stayed in the negotiation room and did not leave. After Nuzama and his party left, he apologized to Lin Zhenhua: "Mr. Lin, I really didn't expect it to be like this. Nuzama, who studied in university in France and returned to politics, has been funded by Western consortiums, so his idea..."

"Harole, no matter what the result is, I thank you very much." Lin Zhenhua interrupted Harole and said, "You are our good friend. As for Nuzama, everyone has their own ambitions, and we don't force him. I believe that we can convince him with excellent technology."

Harrowe said: "Mr. Lin, I remember when I first met you at the Frankfurt exhibition, all you could exhibit were outdated equipment. Of course, those equipment still played a great role in the industrialization of our country of Usang. Now, you have been able to exhibit so many products that reach the world's first-class level, which is really different from the past. I fully believe that in a few years, you will become the most competitive exhibitors at the Frankfurt exhibition, and this day will not be far away."


Chapter completed!