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Tenjin Power Plant
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Tenjin Power Plant

[Location]
 Kanoya city, Kagoshima
[Output]
 2,603kW
[Expected annual power generation]
 3,133,000kWh
[Commercial operation day]
 August, 2016

Tenjin Power Plant

Alongside Kagoshima Bay, in the Osumi Peninsula.
The construction site is a plateau of shirasu volcanic soil, surrounded by trees. Since this place is raised one level above the seashore, it is sandwiched between the island of Sakurajima, which floats in Kagoshima Bay to the north, and Kagoshima Bay itself to the west, and looks out onto Mount Kaimondake, locally nicknamed the “Mount Fuji of Satsuma”.
At the start of development, a complete image appeared in my mind of a power plant that beautifully incorporates the surrounding landscape.

However, there were various issued involved with the construction.
The shirasu volcanic soil is vulnerable to being washed away by rain, so we had to cover it with asphalt.
As a result, the black color of the asphalt blends naturally into the surroundings, producing an elegant aerial photograph of the site.

Moreover, since the plant lies along the coast, countermeasures against salt damage were crucial.
We proposed the utilization of salt damage-resistant materials, starting with the solar cell modules, in addition to carrying out washing of the solar cell modules, and performing maintenance to minimize salt damage.

Project Leader: Tatsunobu Kaneko

What is shirasu?
Shirasu is a colloquialism thought to derive from the Japanese words for “white sand”, and generically refers to white-colored sandy deposits consisting mainly of materials of volcanic origin.
Although white sand in general used to be known as shirasu, nowadays it is said that the custom of using the word only remains in Kagoshima.
Shirasu does not solidify easily and has good drainage, causing the land to be vulnerable to erosion and collapse during periods of heavy rain.
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