IELTS Reading Revision – Solar-Panel Roads to Be Built on Four Continents Next Year
Solar-Panel Roads to Be Built on Four Continents Next Year
Electric avenues that can transmit the sun’s energy onto power grids may be coming to a city near you.
A subsidiary of Bouygues SA has designed rugged solar panels, capable of withstand the weight of an 18-wheeler truck, that they’re now building into road surfaces. After nearly five years of research and laboratory tests, they’re constructing 100 outdoor test sites and plan to commercialize the technology in early 2018.
“We wanted to find a second life for a road,” said Philippe Harelle, the chief technology officer at Colas SA’s Wattway unit, owned by the French engineering group Bouygues. “Solar farms use land that could otherwise be for agriculture, while the roads are free.”
As solar costs plummet, panels are being increasingly integrated into everyday materials. Last month Tesla Motors Inc. surprised investors by unveiling roof shingles that double as solar panels. Other companies are integrating photovoltaics into building facades. Wattway joins groups including Sweden’s Scania and Solar Roadways in the U.S. seeking to integrate panels onto pavement.
To resist the weight of traffic, Wattway layers several types of plastics to create a clear and durable casing. The solar panel underneath is an ordinary model, similar to panels on rooftops. The electrical wiring is embedded in the road and the contraption is topped by an anti-slip surface made from crushed glass.
A kilometer-sized testing site began construction last month in the French village of Tourouvre in Normandy. The 2,800 square meters of solar panels are expected to generate 280 kilowatts at peak, with the installation generating enough to power all the public lighting in a town of 5,000 for a year, according to the company.
For now, the cost of the materials makes only demonstration projects sensible. A square meter of the solar road currently costs 2,000 ($2,126) and 2,500 euros. That includes monitoring, data collection and installation costs. Wattway says it can make the price competitive with traditional solar farms by 2020.
The electricity generated by this stretch of solar road will feed directly into the grid. Another test site is being used to charge electric vehicles. A third will power a small hydrogen production plant. Wattway has also installed its panels to light electronic billboards and is working on links to street lights.
The next two sites will be in Calgary in Canada and in the U.S. state of Georgia. Wattway also plans to build them in Africa, Japan and throughout the European Union.
“We need to test for all kinds of different traffic and climate conditions,” Harelle said. “I want to find the limits of it. We think that maybe it will not be able to withstand a snow plow.”
The potential fragility joins cost as a potential hurdle.
“We’re seeing solar get integrated in a number of things, from windows in buildings to rooftops of cars, made possible by the falling cost of panels,” Bloomberg New Energy Finance analyst Pietro Radoia said. “On roads, I don’t think that it will really take off unless there’s a shortage of land sometime in the future.”’
Questions 1 – 3: Choose THREE correct answers from the list of possible answers below for this question, based on information given in the text:
Which of the following statements are true?
A. Solar-panel roads are already available in 100 different sites around the world.
B. Solar-panel roads may sometimes be used for agricultural purposes.
C. Solar panels and their application are adopted by different companies specialising in different businesses.
D. The solar-panel road in Tourouvre, when finished, can fulfil the public lighting demand for up to five thousand people.
E. Solar-panel roads now cost more than traditional solar farms to build and develop.
F. Charging electric vehicles is the only purpose of creating roads empowered by solar energy.
G. Wattway aims to expand their project to other continents in the world to reach as many customers as possible.
H. A shortage of land will lead to a fall in costs of making solar panels.
Please find the answers here.
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Want to learn more about the financial and technological hurdles behind building solar-powered roads? Watch this report from the National Geographic: