Photovoltaic pavement on the middle lane has been demolished

[Question on demolition]

Photovoltaic pavement is not to be dismantled but to be rebuilt

On August 15, reporters drove to the South Circle High-speed Field Survey. This photovoltaic pavement about 1 kilometer long was originally laid on a lane and emergency lane. Nowadays, most of the photovoltaic panels of the lane have been replaced by newly laid asphalt pavement. The photovoltaic panels of the emergency Lane have not been removed, but there is a breakage every few meters. The most serious part of the joints of the photovoltaic panels is bulging and falling down. Rough statistics show that there are three or four large vehicles passing through this section every minute.

Site builders are reluctant to say much about the ongoing process. "This (photovoltaic panel) will be installed after demolition. It is invested by Qilu Transportation Development Group. The specific situation is not clear to us."

What's wrong with the photovoltaic pavement? Why should it be demolished? The reporter interviewed Zhang Xuan, the head of the research and development team of the photovoltaic Expressway test section of Qilu Transportation Development Group.

Zhang Xuan said that they are not to dismantle the photovoltaic pavement, but to upgrade. It seems that the surface of the panel is damaged, but the problem is not in the surface. The main reason is that the load of the truck is changed because of the heavy pressure and rainwater intrusion. "The photovoltaic module itself shows good bearing capacity and power generation function. The field test on the road shows us that there are other forms of damage besides the components." So they first removed the photovoltaic panels and repaired them from the bottom asphalt, and then put them on.

Zhang Xuan disclosed that the road condition around the southern city is more complex. The location of the test road is here to analyze the response of photovoltaic pavement under different stress surfaces and different environments. "We want to find problems and adjust them as soon as possible so that technology can mature faster on complex pavement, taking into account all kinds of factors."

[The Road of Net Red]

Headline Frequent Passengers 4 Closed Maintenance in 8 Months

As the world's first photovoltaic Highway Test section, South Circle Photovoltaic Road was officially opened on December 28, 2017, and once exploded social media at home and abroad.

On January 2 this year, the sixth day of the photovoltaic pavement opening, the staff found that the pavement was damaged during routine inspection, one transparent concrete surface layer was lost, and the other seven panels were heavily hit. It was once suspected that the "black hand" was a professional team interested in technology. However, according to the police investigation and expert consultation, it is believed that "bumps should occur in the high-speed driving of large and medium-sized vehicles, and the suspensions on vehicles cause damage to the road surface".

On July 3, an auto-media article entitled "The photovoltaic highway is damaged more than half a year, such as psoriasis" brought the "net red road" back to people's attention. Many people are surprised by the scarred road surface compared with the road when it was first opened to traffic.

Reporters learned that the operation of more than eight months, this photovoltaic road is indeed repeatedly damaged, and has to be regularly closed maintenance. Up to now, this less than 1.5 km test section has undergone four closed construction and maintenance.

[Debate of Ideas]

R&D of more than 80,000 yuan per 100-day power generation revenue said that the cost of the test period was not carefully investigated.

If there is sunshine, there will be shadow. Since the opening of photovoltaic pavement, outside doubts about its economic benefits follow. After 8 months of trial operation, what is the revenue of this section of power generation?

Zhang Hongchao, the chief scientist and professor of Tongji University, said in an interview with CCTV that the price at the stage of research and development does not represent the future commercial cost, but at present, the cost of pavement construction of photovoltaic highway is less than 3,000 yuan per square meter, and the cost of similar technology abroad is between 14,000 yuan and 15,000 yuan. At the opening ceremony on December 28, 2017, Xu Chunfu, chairman of Qilu Transportation Development Group, introduced that the total net area of this photovoltaic road was 5875 square meters. Simple accounting, its cost is about 17.6 million yuan.

According to the relevant staff of Jinan Power Supply Company of State Grid, because there is no energy storage device in the test section, all the power generated is now found and sold to the State Grid. Xinhua News Agency has reported that although the photovoltaic test section experienced many weather conditions, such as fog, rain and snow, the overall power generation capacity still reached expectations, with a total power generation of 96.02 million kWh in 104 days and an average power generation of about 923 kWh per day. The electricity price on the grid consists of government subsidies and benchmark tariffs, totaling 0.85 yuan/kWh. This is equivalent to about 785 yuan per day for generating electricity, and more than 82,000 yuan per 104 days for generating electricity. According to this calculation, the revenue of power generation is about 188,000 yuan after 8 months of trial operation.

Relevant leaders of the project development team said that the first photovoltaic highway test section in the world has the primary significance of scientific research. This stage does not need to pay too much attention to the cost. In fact, they will also evaluate the value of materials and eliminate those who do not have room for price reduction. "But the outside world tends to misunderstand us `cost-free'." He also emphasized that "value cannot be measured by money".

trend

Jinan will add another Photovoltaic Test Road

According to people familiar with the situation, there is another bigger test site in Jinan for photovoltaic highway. Compared with the test section around the South city, the new test site is more comprehensive, and the vehicle wireless charging technology and the vehicle-road interconnected unmanned driving technology will be tested here. Where is the new test site? The above-mentioned people said that the scope of the site has been initially determined after the highway was diverted to the abandoned section, the road condition is simpler than the southern ring, the terrain is more gentle, belonging to the "semi-closed nature". This means that, unlike the test section around the southern city, citizens may not be able to drive on this section.

dialogue

Is building photovoltaic highway a commercial gimmick?

Question: There are many damages on the photovoltaic pavement after six months'operation. Does this mean that the new technology is unsuccessful?

Answer: The Southern Circle is only a verification of our technology. The public may have a biased understanding of this aspect. In fact, before any road materials can be widely popularized and applied, there must be a test section, and it must be displayed on the real road. Photovoltaic pavement itself is an innovative technology, from the enterprise point of view, the biggest difficulty of our research and development is that there is no reference case either at home or abroad, all we do is from "0" to "1" concept, feeling the stone across the river.

Question: Some people questioned that the commercial propaganda of paving the photovoltaic highway is greater than the reality. How to respond?

Answer: It's just a scientific research project. Every day, a lot of new data will be obtained, which the public does not know. If we have to analyse with the public, the pressure will be great. If we are for commercial purposes, we can choose a less sloping area with relatively simple pavement structure. Scientific research itself is a spiral upward process, in which there are breakthroughs and problems. Our idea is to minimize all factors (effects) that have nothing to do with scientific research and concentrate on scientific research.