At three o'clock in the afternoon, Zhao Anran came to the Energy College, one hour earlier than the time she and Liu Hanlin had agreed. She wanted to get acquainted with the environment first, and she didn't have a good visit to the college building when she reported before, so she could go around by herself this time.

There was a booth introducing new energy in the hall on the first floor of the teaching building of the college, and Zhao Anran approached to take a closer look. There are all kinds of solar cells in the booth: monocrystalline silicon cells, polycrystalline silicon cells, thin-film batteries, gallium arsenide solar cells, etc., this is the first time Zhao Anran has observed the real thing so closely, and she has seen it in books, TV or various media software before, in fact, if it weren't for the kind of Chinese and English labels next to it, she couldn't tell who was who.

Then see the solar vacuum tube collector next to it, this is also the most common use of solar energy, many families will choose to install solar water heaters, basically this shape, but the top of this vacuum tube collector is not filled with hot water, but connected to a transparent glass box, which has a material rack to place things, and it is written next to solar drying.

The most shocking should be the photovoltaic curtain wall of this college, a total of six floors of the teaching building facing south of the wall are installed spliced together solar cells, each cell has a gap in the middle, the two sides of the battery are fixed with glass, can penetrate the light into the teaching building, there is an electronic screen to display the power generation of the photovoltaic curtain wall in real time.

There are also many models of solar energy utilization, Zhao Anran has carefully studied, from book knowledge to practical application, the conversion of different forms of energy, which is very attractive to her, a newcomer who has just come into contact with solar energy knowledge.

Liu Hanlin finished his work and called Zhao Anran and asked her to go to the fourth floor of the college. Zhao Anran went to the fourth floor and found that there was a glass door, and there was a fingerprint control switch next to it, "It's really the plot of the movie, you have to scan your fingerprints when you enter the door." As soon as she was muttering in her heart, Liu Hanlin came out of the glass door, "Come, I'll take you on a tour of the laboratory, and then arrange a seat for you." ”

After entering the laboratory, Zhao Anran realized that the booth and model he saw in the hall just now were nothing.

"Our solar energy experiment is divided into two parts: indoor and outdoor, indoor is mainly to simulate light sources, analytical instruments and computer simulations and data processing, outdoor is mainly to measure and collect all kinds of data on different platforms, and I will tell you about the specific research direction when you determine the research direction." Liu Hanlin took Zhao Anran to visit the laboratory while explaining in an orderly manner. "Our research group has a lot of research directions, which are roughly divided into solar power generation, solar heating and cooling, and solar drying, etc., and we will set a research direction for you after Professor Li interviews you."

"I think I have a lot of self-study content, so what will Professor Li use to set my research direction on what basis?" Zhao Anran felt confused, with so many directions, what was she going to do?

"This has to be determined based on your own strengths and interests, maybe Professor Li will let you choose by yourself, after all, scientific research is a boring process." Liu Hanlin smiled bitterly.

Walked to the outdoor experimental platform, all kinds of solar devices appeared in Zhao Anran's eyes, and the characteristics of the solar energy experimental platform are one word - big. No matter which platform requires a certain floor area, the smallest platform also needs to occupy more than 10 square meters.

The most eye-catching thing is the huge groove-shaped stainless steel platform, "that is an experimental platform for a doctoral student, he just graduated, this platform has exhausted a lot of his efforts from scratch, of course, he has also used this platform to publish many research articles, including articles in SCI area 1 and 2, which is also the best explanation of his strength in the world's scientific research circles." Liu Hanlin explained to Zhao Anran how to encourage: "I believe you can also send high-quality scientific research papers!" ”