You certainly can not imagine that the transportation industry combined with the new energy industry will be wiped out what kind of sparks.Recently, the first paragraph of the domestic photovoltaic road appeared in Jinan, has attracted traffic and new energy industry's attention.
It is understood that the length of the road about 2 km, the entire section of the road using a 'load-bearing photovoltaic road technology', the collected solar energy into electricity to achieve solar power, is expected to be officially opened by the end of 2017.
Photovoltaic Road reliable?
It is understood that this project is funded by the Qilu Traffic Development Group investment in construction as early as December 2016, the project has been started in September this year to complete a 160-meter-long, about 660 square meters of photovoltaic pavement Demonstration zone, which is now extended to 2 kilometers and is officially used on the road, there are not many difficulties to overcome.
From a technical point of view, the entire section of the road uses a 'load-bearing photovoltaic pavement technology' so-called 'load-bearing photovoltaic pavement technology' is to meet the traffic conditions of photovoltaic power generation components directly on the pavement, the use of solar power. Of course, Power generation components are not exposed directly on the road, above it is also laid a layer of 'transparent concrete' to be protected.
The research team of Professor Zhang Hongchao from School of Transportation Engineering of Tongji University provides the core technology for this photovoltaic highway project.From 2009 to put forward the idea and formally use today, the technical index of load-bearing photovoltaic pavement researched and developed by Zhang Hongchao's scientific research team and the safety factor All surpass the currently widely used asphalt concrete pavement. The strength and performance of the asphalt pavement can meet the needs of normal running of the vehicle, enabling the photovoltaic road not only to carry small vehicles but also to carry large and medium-sized trucks.
However, there are also some people in the industry who disagree with it.First of all, there are many vehicles on the road that obstruct the road surface and the long-term passing of the road surface by rolling vehicles, which will most likely cause the vibration of solar panels and dust covering the road. In short, to ensure stability, good power generation efficiency with continuous power generation is not ideal.
In addition, the cost of photovoltaic roads is much more expensive than asphalt roads, resulting in a corresponding increase in maintenance costs, such as the need to replace unavoidable damaged panels and the severe impact of external factors such as routine traffic and bad weather Caused by the technical damage.
Photovoltaic pavement precedent
In fact, photovoltaic pavement projects have long been the successful implementation of precedent in 2006, a couple of scientists in the United States put forward the idea of 'photovoltaic pavement' and proceed with the research they developed a solar panels (Solarroadways), the surface material is super Wear-resistant special glass, the maximum load up to 125 tons, to ensure that the car driving above the solar panels will not cause damage to them.
Officials have compared Solarroadway, concrete, asphalt three different pavement materials, the results of Solarroadway in strength, friction, etc. are the only drawback is its cost is too high .This pair of scientists said that the initial solar panels each The cost of the block is about $ 6,900, at least 50% more than the cost of a traditional asphalt road, which would cost astronomical to replace the entire US road with a solar-powered road.
The first photovoltaic pavement in the world was officially put into use in the town of Turfull Opal in the northwestern part of France in May this year, which is currently the first truly 'photovoltaic road' for motor vehicles in the world.
This 1 km long, 2 meters wide, one-way driving 'photovoltaic road' covered with square solar panels in the do not take up extra space under the premise of this section of the road every day for the city power generation nearly 800 degrees, the annual power generation About 280,000 degrees, to meet the daily consumption of a small population of 5000 population.
The benefits of photovoltaic pavement
1. Generate enough electricity
First of all, from the power point of view, such a photovoltaic power generation per square meter a year can reach 239 degrees to the highway in Shandong Province, for example, the province's highway emergency stop total area of 2600 million square meters, if All laid on the photovoltaic modules, under normal circumstances the annual power generation will reach 6.217 billion degrees, power generation benefits 6.093 billion yuan.
Statistics show that as of the end of 2016, China's highway mileage of 4580000 km.If the highway only two lanes of about 32.1 billion square meters of laying the photovoltaic pavement, annual power generation can reach 7.6 trillion degrees.According to data released by the Bureau of Energy, In 2016, the total electricity consumption in our society was only 5.9 trillion kWh, compared with 1.3 times the electricity consumption of PV Highway, which could fully meet the huge electricity demand in our country.
Power storage
The "West-East Power Transmission Project" has been taking a long time in our country. However, with the rapid development of the eastern part and the well-developed manufacturing industry, even such a huge project of "sending power from the west to the east" can not completely fill the huge electricity shortage in the east. Provides a perfect solution.
Although the eastern region is short of electricity, it wins the dense road network and makes full use of the advantages of the eastern road network. Using the road as an energy collecting platform and a power supply platform, it can be used spontaneously and not only meet its own electricity demand but also avoid 'Power transmission from west to east' caused by long-distance transmission of power loss and other issues.
Road safety
Winter travel, encounter snowy weather, the road is extremely easy to snow icing, which brings a lot of security risks to the car driving.China's current snow-covered road treatment no more than manual snow shovel, mechanical snow shovel or There are several ways of spreading deicing salt, but these methods are labor-intensive and have some damage to the road and may cause environmental pollution.
The 'PV Highway' is also very convenient to use due to its own storage of enough electricity, it is entirely possible for it to be equipped with a means of converting electric energy into heat, by manually turning on or intelligently sensing the icy condition of the road to turn on the electric heating system, to melt snow and ice, Travel safety.
4 energy saving
In the traditional solar power generation mode, the solar panels need to occupy a certain space, and the solar energy and the road surface will not take up extra space.In addition, compared with the traditional coal power generation, the nuclear power generation It is also more environmentally friendly and conducive to improving the natural environment.
summary:
Looking at the world, pavement and solar power is undoubtedly a combination of new application model, many countries are trying our country from PVT road to industrial development, has been lopsided. 'PV Road' was born in the transport industry and The landmark event of in-depth integration and development of the new energy industry will provide a new model for public travel, opening up entirely new prospects for the development of smart transportation and green energy.
