Three giant mirrors with 51 square meters that illuminate the valley bottom town of Norway with the sun

Capital city of NorwayOslo70 mile (about 112 km) from the valley base to the westRyukan, As a idea to save a town without sun during the winter, a project to install three huge mirrors of 51 square meters on the summit and deliver sunlight to the town was carried out.

Fakta om Rjukan og Tinn - Om Rjukan - Visit Rjukan
http://www.visitrjukan.com/om-rjukan/fakta-om-rjukan-og-tinn

Norwegian Town's Bright Idea Is A Shining Example Of Ingenuity: The Two-Way: NPR
http://www.npr.org/blogs/thetwo-way/2013/10/23/240240813/norwegian-town-s-bright-idea-is-a-shining-example-of-ingenuity

Ryukan, the southwestern part of NorwayTelemark provinceIt is in Tinn area. Originally 104 meters of headingRjukan Falls (Rjukanfossen)It was only about there, but an energy companyNorsk-HydroIn 1905, a factory for the production of Norwegian nitrate was established as Samuel Eide, the founder of the Norwegian Foundation, issued the idea of ​​"to use waterfalls for hydroelectric power generation". Along with this, the "industrial city Ryukan" was formed in the valley by about 1916.


Lucan, a town where 3,500 people lived thereafter, almost never arrived from September to March every year, and it was suffering from darkness and cold for a long time. The townspeople managed to live by the light of the sun raining only for half a year.


As of 1913, Mr. Ede said "SolspeilThere was an idea of ​​a mirror that used sunlight, but it was not just "You can set a big mirror on the mountain", but at that time the technology could not complete the Solspeil project. Therefore, as an alternative in 1928, the gondola leading to the summit where sunlight hit the most "KrossobanenEstablished. Even now, this gondola is still being used by townspeople and thousands of people are sent out every summer to a summer sunshine trip.


The Solspeil project had been abandoned for a long time, but in 2005, a project to bring sunlight back to the town began to move, spending a total of 825,000 dollars (about 80 million yen) over the summit Three huge mirrors of 51 square meters were installed per piece. The mirror was controlled by a sensor and a computer, and it was able to deliver about 600 square meters of elliptical sunlight to the town square of Rjukan.


This project is carried out by Norsque Hydro, and the power of the solar mirror will be covered by hydroelectric power generation. Karen Rowe of the tourist information office in the town says, "Many townspeople will be active even in autumn and winter season," and since the town began, it is said that "to take sunshine even in winter It is said that the townspeople are gathered under the sunlight of the plaza.


Similarly, in the case where sunlight is delivered using a mirror to the city where the sunlight does not hit,Even in Italy it is being carried out while being small scale... apparently ...