Mitsubishi to Supply Solar Electricity to Skyscraper

2014/04/02 20:51
Kenji Kaneko, Nikkei BP CleanTech Institute
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Mitsubishi Estate Home Co Ltd announced that it will meet about half of the contract demand of the "Shin Marunouchi Building" near Tokyo Station with electricity generated by using biomass, biogas and solar power from April 2014.

Mitsubishi Estate Home concluded the "contract for electricity purchase by proxy" with Eneres Co Ltd, which mediates electricity trade, etc. In the contract, the Shin Marunouchi Building is the demander. Eneres will procure electricity in accordance with the demand of the building by using the "partial supply" scheme, which purchases electricity from both a general power supplier and a PPS (power producer and supplier).

First, the PPS, Iwate Wood Power KK (Miyako City, Iwate Prefecture), purchases renewable energy-derived electricity from power producers. Then, Eneres buys power from Iwate Wood Power and a general power supplier and supplies it to the Shin Marunouchi Building.

The renewable energy-derived electricity is purchased from (1) a biomass power plant that uses forest thinnings and waste from timber mills and is located in Miyako City, Iwate Prefecture, (2) a biogas power plant that uses inflammable gas generated by fermenting food wastes produced in Tokyo and (3) a mega-solar (large-scale solar) power plant that Mitsubishi Estate Home built in Sakura City, Chiba Prefecture.

Mitsubishi Estate Home is considering the following operation procedures. As a primary power source to be used around the clock, electricity purchased from the general power supplier is used. During daylight hours, when power demand increases, electricity generated by using biomass and biogas is used. And from 13:00 to 17:00, when power demand peaks, electricity from the mega-solar power plant is used.

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