Nigoike Solar Power Plant
Kakogawa city, Hyogo
[Expected annual power generation]
[Commercial operation day]
A Waterborne Solar Power Plant
Gaia Power has built our own power plant on an agricultural pond, adopting float technology.
Initially, when we heard that the construction site would be a “pond”, my reaction was one of amazement: “What!? How can we build on water?”. But when I learned about the method of setting a frame using styrofoam on a base covered with a metal plate resistant to UV rays and water, I slapped my knee in realization. “That’s it!”
The pond is for agricultural water use, so in order not to adversely affect the water, we utilized styrofoam materials that had passed the Grade A Food Hygiene Standard, used by mass food retailers.
According to the suppliers, this float frame has a buoyancy of 4 tons, and will not sink even if 40 adult men stood on top. Of course, we also took countermeasures against the wind. An anchor was cast at the bottom of the pond, and weights were sunk to keep the frame moored.
The pond now generates electricity in addition to continuing to play its previous role of supplying agricultural water.
The frame of this power plant is anticipated to act as a shield to suppress thermal vaporization and prevent algae growth, leading to maintenance of the water quality.
Furthermore, we hope that the power plant will play a role in maintaining the local environment and farming culture.
Project Leader: Takuya Kiso
- What is float technology?
- In order to build on the surface of water, separate measures to those for construction on land are required, such as for stability, storm countermeasures, durability, and consideration for water quality conservation.
Additionally, it is necessary to investigate construction methods and frame composition to ensure that the plant will not be damaged by fluctuations in the water volume.
A high degree of maintenance, including of the float itself and of the solar cell modules, is required to enable long-term stable operation of the power plant.