Do you engage in scientific research?

Chapter 181 Shocking the audience
Two of the things she is most interested in are heat pump technology and solar cooling systems.

Heat pump technology is a new type of energy-saving air-conditioning refrigeration and heating technology. It uses a small amount of high-grade electric energy as the driving energy to absorb low-grade heat energy from a low-temperature heat source and transmit it to a high-temperature heat source to achieve the purpose of pumping heat. Energy with a low energy-quality coefficient is converted into an energy with a high energy-quality coefficient. Saving high-grade energy is a technology that can improve energy grade.

The research on solar refrigeration systems mainly includes two types in principle. One is to use thermal energy as the driving energy, such as absorption type, adsorption type, jet refrigeration, etc.; the other is to use electric energy as the driving energy. Electric energy, and then use electric energy to cool, such as photoelectric refrigeration, thermoelectric refrigeration, etc.

Solar refrigeration technology is a very promising field in the utilization of solar energy.Since the supply of heat and the demand for cooling can be highly matched in terms of season and quantity, the stronger the solar radiation, the higher the temperature, and the greater the demand for cooling. Therefore, solar refrigeration technology is also a hot spot in the current refrigeration technology research.

These two technologies were demonstrated by two teams from H University and Emin Aaron's J University.All seven judges gave high marks.

It is true that these two technologies are extremely beneficial to energy conservation, environmental protection and human development needs both in terms of prospects and scope of application.The two teams are indeed worthy of the prestige of their respective alma maters. Although the results shown are not mature and perfect, they all have breakthroughs in innovation.

That's pretty amazing for their age.If I were to be a judge in my spare time, I would give such a high evaluation.

Unknowingly, it was almost their turn to be idle in the appraisal team.

Coincidentally, the team in front of Xianyu happened to be the team from country E who also researched solar cells like Xianyu and the others, that is, the team that Emily Brent gave away materials for free.

Lei Yu looked at Emily Brent, who was also looking at her, and smiled provocatively. If Emily Brent didn't interfere in this order, she could twist her head off and give her a kick .

Xian Yu glanced at her, then turned his head back blankly, the thing that hurts the opponent the most is not to argue with reason, but to ignore it.

It has to be said that the team of country E is still quite capable. Not only did they apply all the information she sorted out to their own research and development, but they also made some breakthroughs.

To compare the advantages and disadvantages of solar cells, it is nothing more than to look at the application cost, technical difficulty, and conversion efficiency.

The solar cell technology developed by the country E team does not have any major breakthroughs, but the cost is well controlled, and the conversion rate is not bad. Generally speaking, it is considered a relatively bright existence in this competition.

After they showed off, the rest of the team followed. Before going on stage, she glanced at Emily Brent, showing a meaningful smile, and looked at Emily Brent inexplicably.

After Lei Yu and the others came on stage, before they even started talking, the judges became restless.

"You are the team of University Q?" Professor Lewis of University H even stood up excitedly.

"Yes, Professor Louis." Lei Yu nodded.

The professors next to Professor Louis had to sit a little longer. Although they were also very excited, they still held back and pulled Louis who was standing up by the way.

"Okay, okay, you can start showing your results." After sitting down, Louis said repeatedly, and couldn't wait for Lei Yu to start explaining his research results.

But the other teams in the audience and many viewers watching the live broadcast began to feel something was wrong.

The serial number of the idle team is 27, and there are 27 teams before her team, including many famous Ivy League schools, even H University and J University.

But the seven professors present here have always been as calm as a mountain. They may appreciate it, but they will not be as restless as they are now.

With the idle explanation, they began to understand why these professors and researchers were so restless.

Not to mention the judges, they are also restless, okay?

Lei Yu did not introduce the solar space battery they developed according to the conventional explanation of the previous team, but first threw out several sets of data, which were materials, cost and conversion rate.

Just looking at the cost or material set of data is actually not conspicuous, because their cost is slightly more expensive than solar cells on the market, and the materials are also commonly used in solar cells.

But looking at it together with the conversion rate, these two sets of data are amazing.

At present, there are only a few materials used in the field of solar cells, but considering the conversion rate, most of them are monocrystalline silicon and polycrystalline silicon.

However, the battery developed by Yu Yu uses amorphous silicon.

Amorphous silicon solar cells have become effective materials for optoelectronic devices due to their good light absorption coefficient in the visible light range and wide range of price control properties, and because amorphous silicon can realize low-cost large-area thin-film Deposition, so its application prospect is wider than single crystal silicon and polycrystalline silicon.

It stands to reason that such a good material should be widely used, but because of its obvious shortcomings, monocrystalline silicon still occupies the main application market.

In single-junction amorphous silicon solar cells, the biggest problem is the existence of light-induced degradation SW effect, resulting in very unstable performance.

Their solution is to stack solar cells so that they can combine different materials with different band gaps to widen the response range of the spectrum, and at the same time increase the effective light in different spectral ranges by adjusting the band gaps of different intrinsic films. absorb.

And use its top battery to prevent the occurrence of light-induced degradation, and use its bottom battery to reduce the light-induced degradation effect.

Of course, this alone is not enough.

Because the stability of stacked cells has improved compared with single-junction cells, but its conversion efficiency has not exceeded that of single-junction cells.

So under the suggestion of Yu Yu, they added a low-cost dye sensitization technology to it.

Dye sensitization technology is to attach a pigment to silica particles, which are then soaked in an electrolyte.The pigment is irradiated by light to generate free electrons and holes. The free electrons are absorbed by silicon dioxide, flow out from the electrode and enter the external circuit, and then flow into the electrolyte through the electrical appliance, and finally return to the pigment.

This combination of the two not only improves the stability problem, but also greatly improves the conversion efficiency. It can be said that this is a major breakthrough and impact on the field of solar cells.

After I finished the explanation, the scene was quiet for a few seconds, and then enthusiastic discussions erupted, both the judges and the participating students were discussing.

While Ji Mo in the audience listened to the endless discussions, a touch of pride appeared on his face, and he smiled brightly at Xianyu.

　All technical and professional knowledge are all my nonsense. Professionals must not criticize me. The awareness of survival can be said to be very strong.

　　
　
(End of this chapter)