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Maximum Summer Electric Power Consumption Cut by 27 percent in the Takenaka’s Tokyo Main Office and by 44 percent at the Takenaka Research & Development Institute

—Beginning of operation of photovoltaic power generation and completion of the switch-over to LED lighting to save electric power this winter—

October 24, 2011Takenaka Corporation

Takenaka Corporation (President: Toichi Takenaka) used facilities within the jurisdiction of the Tokyo Electric Power Company from July 1 to September 9 to take a variety of electric power conservation measures under Article 27 of the Electricity Business Act, and has confirmed that these actions cut its maximum electric power consumption (peak electric power) from the previous year’s level by 27 percent at the Tokyo Main office (Koto-ku, Tokyo), and by 44 percent from the previous year’s level at the Takenaka Research & Development Institute (Inzai City, Chiba Prefecture). This was a result using fewer lights or elevators, changing air-conditioning temperature settings, managing and adjusting operating schedules of large-scale test equipment and facilities, and other operating initiatives, greatly exceeding the government’s electric power saving goal of 15 percent.

Tokyo Main Office Building

(Maximum electric power consumption down 27 percent from the level last year: 2010/1,160KW→2011/840KW)

<Principal electric power conservation measures and activities>

  • Using fewer lights and turning off lights during lunch breaks (switch over to LED lighting in September)
  • Setting the air-conditioning temperature higher than 28°
  • Alternatively shutting off selected elevators and promoting the use of stairs by shutting down elevators
  • Visualizing electric power by displaying it at PCs on employees’ desks
  • Reducing the number of vending machines in operation and replacing them with energy-saving models
  • Shutting off PC monitors when not needed, and using electric power saving settings

Takenaka Research and Development Institute

(Maximum electric power consumption down 44 percent from the level last year: 2010/1,644KW→2011/918KW)

<Principal electric power saving measures and activities>

  • Visualization and demand control of the operation of test equipment and facilities
  • Shutting down heat source equipment during peak power consumption periods
  • Adjusting the operating schedule of large testing equipment to avoid their use during peak electric power consumption periods
  • Planning the operation of air conditioning in the test building based on the test schedule
  • Visualizing electric power by displaying it at PCs on employees’ desks
  • Reducing ambient lighting (use of task lighting)

This summer’s restriction of electric power consumption has concluded, but this winter, Takenaka will continue energy saving repair works that began in July, and will take further initiatives to reduce maximum electric power consumption and to conserve energy at both its Tokyo Main Office Building and at the Takenaka Research & Development Institute.
The Tokyo Main Office Building started operating a photovoltaic power generation system (145KW) on September 28, 2011 and completed the introduction of LED lighting at the end of August 2011. In the future, it will expand its natural ventilation system and introduce task lights and cogeneration. The Takenaka Research and Development Institute started operating a photovoltaic power generation system (90KW) and bifacial photovoltaic power generation on September 28, and in the future will operate a natural ventilation system which has already been introduced.