Solar Plant Exploits City Policy on Landfill (page 2)
Integrated foundation resolves construction restrictions
Fig. 2: Nine mega-solar power plants and four wind power plants are integrated in Hibikinada area. Output ranges from 1MW to 20MW at the solar power plants and from 2MW to 15MW at the wind power plants. (source: Hibikinada Development).
Fig. 3: Flying near the windmill is an Eastern march harrier, which is designated an endangered species. A waste disposal facility turns into an untouched natural environment, where rare species live. (source: Nikkei BP)
Fig. 5: Concrete pieces that combine the foundations and the mounting system are put in place. As concrete foundations could not be built on the ground, the resistance required to set up solar panels was secured by the weight. (source: Nikkei BP)
Hibiki Solar Power is situated in Block No. 2 (approx 369,000m2) of the facility, which was filled next (Fig. 4). Japan Asia Group's mega-solar power plant with about 2MW output is in the adjoining site across a fence.
Landfill was completed in the facility's Block No. 2 in 2011. Following Kitakyushu City's plan, Hibiki Solar Power was constructed as an effective use of the land being purified.
"Large-scale solar power plants have become a business that can avoid relatively major risks and expect revenue returns following the implementation of the feed-in tariff (FIT) program," said Mitsuo Nakatomi, president of Hibiki Development. "Moreover, the plant is in line with Kitakyushu City's policies."
Acquiring expertise from neighboring preceding mega-solar power plants
Kitakyushu City launched "Kitakyushu City Photovoltaic Power Generation Promotional Council" in January 2012 to offer measures including loan assistance by financial institutions toward the introduction of a solar power generation system. Hibikinada Development participated in this council. It procured financing for the construction costs of about ¥600 million (approx US$5.92 million) based on the council's assistance.
Executive Director Tsuyoshi Hashiguchi, Development & Planning Department of Hibikinada Development, said, "(In regard to the companies to be involved with the mega-solar power plant construction), we selected the companies that have business bases in Kitakyushu City. And we selected related instruments and components made in Japan (while considering their qualities and prices)."
Kyudenko Corp provided the EPC (engineering, procurement and construction) service, while Mitsubishi Electric Corp, Toshiba Mitsubishi-Electric Industrial Systems Corp (TMEIC) and Kokura Cement Co Ltd provided solar panels, PV inverters and mounting systems, respectively.
The mega-solar power plant operators said they could enjoy the local benefits of Hibikinada during construction. They could acquire expertise concerning the installation of a solar power generation system in Hibikinada from the Daiwa House Group and J-Power, which had constructed mega-solar power plants before the Hibikinada Development.
The expertise extended to a broad range of subjects including efforts to steadily secure a large amount of power generation, the amount of power generation among different manufacturers' panels and insurance to be purchased. As a result of reflecting on the experience offered, Hibiki Solar Power did not, for example, take out earthquake insurance.
Mounting system integrated with foundations
This mega-solar power plant has unique features that could only be found at waste disposal facilities. For example, the land is built over the waste buried in the landfill, and the land is purified by letting rain penetrate.
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