Zhang Xinrong: "If you engage in scientific research, you must go to the new road and go difficult" (about the spirit of promoting scientists)

Zhang Xinrong's recent photos. Lu Yan Photo

Character business card

Zhang Xinrong: Born in 1973, a professor and doctoral supervisor of the School of Engineering of Peking University, researchers in the field of natural work quality thermodynamics and its heat transfer and mass transfer, are committed to a number of natural work quality carbon dioxide power generation, refrigeration and heating thermodynamic cycle. Since 2017, it has been hired as experts in the field of Beijing's 2022 Winter Olympics engineering construction, and the national speed skating carbon dioxide cross -crop -cooled ice -cooled ice -making system experts.

"I want to ask myself often what is the most important thing; once it is determined, persistent efforts and moving forward. One day, you will meet with the goals you are pursuing." In mid -June, Peking University, Peking University At the graduate ceremony of the 2022 of the School of Engineering, Zhang Xinrong sent a saying to the graduates as a teacher representative. Such words are related to his scientific research experience ...

Entering the office of Zhang Xinrong, the reporter saw that the two red appointments in the bookcase were very eye -catching: experts in the field of Beijing 2022 Winter Olympics engineering construction, and experts from the national speed skating carbon dioxide cross -critical cold ice -making system.

10 kilometers away from here, it is the national speed slip known as the "ice ribbon". This is the first avenue speed skating pavilion that uses carbon dioxide cross -critical direct cold system. It is not only first -class hardware, but also the world's leading technology, which has achieved low carbonized and zero emissions. There is also a place where Zhang Xinrong devoted a lot of wisdom and hard work.

"Twenty years ago, this afternoon, I started research on carbon dioxide." In the office, Zhang Xinrong opened the box and told reporters about his scientific research experience.

"Use carbon dioxide to do energy carriers to create 'fastest ice'"

During the Beijing Winter Olympics, the participating athletes set a new Olympic record 13 times at the National Speed ​​Skating Museum, which broke the world record once. "Use carbon dioxide to make energy carriers to create 'fastest ice'." This made Zhang Xinrong more convinced that his suggestion a few years ago was correct. "Take the old road or go a new road? Of course, we must work hard, but we have to work hard to innovate."

In September 2016, a seminar on the ice rink ice -making method of the Beijing Winter Olympics was held in Shougang Park. "At that time, I suggested using carbon dioxide ice." Zhang Xinrong said. Most of the previous Winter Olympics used Freon and ammonia as refrigerants. However, Freon and others will destroy the ozone layer, emit large amounts of greenhouse gases, and the risk of explosion; ammonia has certain toxicity and explosiveness. After repeated demonstration, Zhang Xinrong's suggestion was adopted.

At that time, the ice rink of this technology was not adopted in China. "Carbon dioxide is a good energy carrier, just like the portal of nature energy." When talking about technological innovation, the gentle and restrained Zhang Xinrong suddenly said. He picked up the paper and pen and draw a schematic diagram to the reporter: When through the pipeline under the ice, the liquid carbon dioxide evaporates the heat and keep the water into ice; the gaseous gaseous gaseous gaseous gaseous carbon dioxide condenses at high temperature and high pressure. The energy released can be used for the venue Heating, dehumidification, etc. "Cold" means not using frozen liquid and directly use carbon dioxide. Because the temperature of carbon dioxide does not change during phase change, it ensures that the temperature of the ice surface is uniform and the hardness is consistent, which is conducive to the athletes to skate good results.

It is understood that the carbon emissions of the traditional refrigerant (taking the generally used R507 as an example) using the same amount is 3985 times the carbon dioxide refrigerant. Moreover, compared with the traditional cooling method, the energy efficiency of carbon dioxide ice is increased by 30%and a year can save about 2 million yuan.

"The use of carbon dioxide instead of Freon, which is in line with the concept of 'Green Olympic Austrian'." Zhang Xinrong said, "As a scientific researcher, we have no loan in the face of major national needs."

"In the future, there will be more and more application scenarios for carbon dioxide play."

"Initially, carbon dioxide on‘ stating ’is accidental.” Zhang Xinrong recalled that one afternoon 20 years ago, due to his interest in carbon dioxide power generation, he built models in the office and calculated the power generation efficiency of supercritical carbon dioxide. "The calculation result surprised me!" It was late at night when I walked out of the office.

However, new technical paths often mean more difficult to go. "We have failed many times, but what we stick to persistence has not changed." Zhang Xinrong said.

In 2003, Zhang Xinrong, who was working overseas at the time, proposed the thermodynamic cycle of carbon dioxide cross -critical power generation. At that time, water vapor power generation still dominated, and his new views encountered setbacks. "Some of my research articles were repeatedly rejected and waited for several years to publish it. Sometimes they reported at the international conference, and the audience was very small."

"I always think that scientific research topics must have scientific significance and potential practical value. The research of carbon dioxide and its use is exactly this kind of topic." Zhang Xinrong's insistence was not in vain. With the development of science and technology and the country's increasing importance to energy and environmental protection, Zhang Xinrong's proposition has gradually received more support. In 2007, after Zhang Xinrong returned to China, with the support of projects such as the National Natural Science Foundation of China, he began to engage in basic theoretical research on supercritical carbon dioxide. "For more than 10 years back to China, I have really felt the development and change of the country. Our research and related applications have a wider space."

Zhang Xinrong said that today, carbon dioxide has been applied in multiple fields. "In the future, there will be more and more application scenarios for carbon dioxide, involving application scenarios such as cold, heat, and electricity."

On the wall of Zhang Xinrong's office, a dart plate was hung. In addition to work, he often stood there to rest, his screen was condensed, aiming at the target heart, and throwing darts. "Doing scientific research is just like throwing a dart, and you must have a clear goal. Regardless of whether it is smooth or adversity, you must always adhere to." Zhang Xinrong said. "Every student is like a piece of jade, and you need to find the vision and carefully carving."

In the interview, Zhang Xinrong talked the most, one was scientific research and the other was a student.

Zhang Xinrong took out two award certificates from the bookcase and proudly showed reporters. In recent years, he has been rated as an excellent doctoral dissertation, which is a great honor he cherishes. He is familiar with the personality, characteristics and advantages of each student.

Zhang Xinrong devoted great energy in teaching and educating people. "This is related to my tutoring of my tutor." During the study of Tsinghua University, Master Zhang Xinrong passed the Professor Zengyuan from academician of the Chinese Academy of Sciences. The teacher's words taught him deeply, so that he deeply understood the responsibility of the teacher.

"Mr. Guan is over 80 years old, and he still adheres to the forefront of scientific research." Zhang Xinrong said that when scientific research encountered difficulties, it was the instructor who gave him firm support and careful guidance. "The impact of mentors on students for a long time. I think teaching and educating people is one of the most sacred jobs in the world and one of the hardest jobs. Each student is like a piece of jade, and you need to discover the vision and carefully carving. ","

Wang Guanbang, a doctoral graduate student who graduated this year, has participated in the fresh agricultural product super cold chain research project. During the experiment, he stayed in the super cold chain cooling and heat transfer laboratory in Changping District, Beijing for more than a month. Such forgetfulness is closely related to Zhang Xinrong's teachings.

"Remember the first English paper I wrote, and Mr. Zhang modified more than I wrote! From chart data to vocabulary grammar, modified word by word." He is engaged in scientific research at Tsinghua University. "Rigidity and seriousness is the first lesson taught by Teacher Zhang." Jin Licong said.

Right now, Zhang Xinrong is leading the students to continue scientific exploration. "For those who do scientific research, every day is a new beginning, and we must work hard every day. Our steps have not stopped." Research on the application of high -efficiency hot and hot supply technology for carbon dioxide Engineering thermodynamics and new energy technology courses, do academic reports inside and outside the school ... Zhang Xinrong's daily work arrangements are full.

"The research and utilization of carbon dioxide is an emerging field. At the beginning, there are still many difficult tasks that need to be completed. Every step in the next step is critical." Zhang Xinrong said that his choice is still firm: "To engage in scientific research, you must take a new road. Walk difficult. Put your energy on scientific research and teaching, and on major national needs. "

■ Reporter Notes

Adhere to the scientific spirit to pursue scientific value

Perseverance is Zhang Xinrong's most keywords in the interview. For him, if the research on carbon dioxide began with "accidental" inspiration, then turning inspiration into scientific research results lies in the pursuit of scientific value and adherence to the spirit of science.

In the face of a long exploration period, we must be willing to set up the hard work of "the bench sitting for ten years"; in the face of endless hot issues, "every major event is calm", not blindly chasing; facing tedious and complicated complexity; To work, to choose a degree, focus on the most important scientific research goals.

As Zhang Xinrong said, as long as scientists focus on true problems and continue to work hard, the results will be achieved; in the face of major scientific research tasks, they will be more confident, confident, and powerful to complete.

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