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Environmental Preservation

Promoting the Use of Clean Energy

Promoting the Use of Clean Energy

  • A stable power supply and efficient energy usage are essential to the manufacture of industrial chemical products. Since its founding, Denka has proactively developed a network of hydroelectric power plants. Today, this network consists of 15 power plants, and is supplying energy equivalent to approximately 40% of Denka’s energy consumption.
    Meanwhile, at our thermal power plants, which are being converted to run on natural gas instead of heavy oil, we are working to introduce high-efficiency gas turbine generators. We also utilize heat from cement production for power generation while employing biomass boilers for the same purpose with the aim of reducing CO2 emissions attributable to energy use. Going forward, we will engage in corporate activities that give due consideration to environmental concerns, thereby contributing to the creation of a low-carbon society.
Response to Abnormal Weather

As the amount of electricity generated by our hydroelectric power generation facilities change from moment to moment depending on natural phenomena such as rainfall, it is necessary to achieve a good balance in in-house power generation, electricity purchased, and plant operations. Specifically, during abnormal weather—such as large typhoons and torrential rains—and droughts, the departments providing utilities and large plants collaborate to strive for appropriate operation management that does not waste water resources.

A Hydroelectric Power Plant under Construction, Aiming to Reduce CO2 Emissions even Further

The New Omigawa Power Plant (maximum output: approximately 8,100 kW; planned operational kickoff: December 2020) is under construction upstream of the Omigawa Power Plant. Currently, we are conducting the installation of equipment within the power plant and other works. Moreover, Kurobegawa Electric Power Company—jointly owned by us and Hokuriku Electric Power Company—is currently constructing the New Himekawa Power Plant No. 6 (maximum output: approximately 28,000kW; planned operational kickoff: April 2022). Operating these power plants is expected to contribute toward an annual CO2 emission reduction of approximately 35,000 tons.

Long-Term Outlook for Denka’s Renewable Energy (Power Generation Capacity)

Long-Term Outlook for Denka’s Renewable Energy (Power Generation Capacity)

  • Note: The calculation of the figures presented above incorporated 50% of annual output from power plants run by Kurobegawa Electric Power Company (jointly owned with Hokuriku Electric Power Company).
デンカ株式会社, デンカ株式会社 IR室

Initiatives in Electric Power Generation

Power Sources in Fiscal 2019

Power Sources in Fiscal 2018

  • Scope of reporting:Six domestic plants directly managed by Denka, the Innovation Center and other operational sectors (Head Office, branches, etc.)
Initiatives to Expand Use of Clean Energy

Since our establishment in 1915, Denka has actively undertaken the construction of hydroelectric power plants to secure the necessary electricity for the production of carbide and other products. Currently, our network of 15 hydroelectric power plants, including those owned by joint ventures, is supplying energy equivalent to approximately 40% of Denka’s energy consumption. To pass this precious source of renewable energy onto the next 100 years, we are undertaking various initiatives such as renewing facilities and constructing new power plants.

Hydroelectric power plants around Omi Plant and their maximum outputs

Hydroelectric power plants around Omi Plant and their maximum outputs

Total maximum output of Denka’s in-house power generation (as of June 2020)
Facility Map   Maximum output (kW) The amount Denka is
entitled to (kW)
Hydroelectric 1 Omigawa 3,300   3,300  
  2 Kotakigawa 5,200   5,200  
  3 Oami 28,400   28,400  
  4 Otokorogawa 9,800   9,800  
  5 Yokokawa No. 1 10,000   10,000  
  6 Yokokawa No. 2 16,000   16,000  
  7 Umikawa No. 1 3,800   3,800  
  8 Umikawa No. 2 4,700   4,700  
  9 Umikawa No. 3 2,600   2,600  
  10 Umikawa No. 4 990   990 (FIT)
  11 Himekawa No. 6 26,000 Kurobegawa Electric Power Co. 13,000  
  12 Takigami 15,000 Kurobegawa Electric Power Co. 7,500  
  13 Nagatoga 5,000 Kurobegawa Electric Power Co. 2,500  
  14 Sasakura No. 2 10,200 Kurobegawa Electric Power Co. 5,100  
  15 Kita-otari 10,700 Kurobegawa Electric Power Co. 5,350  
    Total maximum output 151,690   118,240  
    Total in-house consumption (excluding output for FIT) -   117,250  
Under construction (completion scheduled for 2020) 16 New Omigawa 8,100   8,100 (FIT)
Under construction (completion scheduled for 2022) 17 New Himekawa No. 6 28,000 Kurobegawa Electric Power Co. 14,000 (FIT)
    (Planned total maximum output for 2022) 187,790   140,340  
Solar   Shibukawa 2,200   2,200 (FIT)
    Isesaki 1,200   1,200 (FIT)
Total maximum output   Total maximum output 3,400   3,400  
Thermal (LNG)   Omi 14,000   14,000  
    Omi (Tomi) 25,000   25,000  
Thermal (waste heat and biomass boiler)   Omi cement 11,100   11,100  
Thermal (Gas turbines and cogeneration)   Omi (Tomi) 17,760   17,760  
    Chiba 12,720   12,720  
Thermal (diesel)   Shibukawa 1,000   1,000  
Total maximum output   Total maximum output 81,580   81,580  
Total maximum output (including output for FIT)         203,220  
Total maximum output for in-house consumption     236,670   198,830  
デンカ株式会社, デンカ株式会社 IR室
Environmental Preservation
Management
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Promoting the Use of Clean Energy
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Promoting the Use of Clean Energy

A stable power supply and efficient energy usage are essential to th...

Environmental Preservation
Promoting the Use of Clean Energy
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Initiatives in Electric Power Generation

Power Sources in Fiscal 2019 Scope of reporting:Six dom...

Environmental Preservation
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Government Subsidies Related to the Environment and Energy

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Environmental Preservation
The Denka Group’s Policies on the Prevention of Environmental Pollution
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The Denka Group’s Policies on the Prevention of Environmental Pollution

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Environmental Preservation
The Denka Group’s Policies regarding and Accomplishments in Biodiversity Protection
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Environmental Preservation
Preservation of Water Resources
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Preservation of Water Resources

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Environmental Preservation
Contribution to the Development of a Recycling-Oriented Society
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Environmental Preservation
Initiatives to Reduce Marine Plastics
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Initiatives to Reduce Marine Plastics

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Environmental Preservation
Environmental Accounting
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Environmental Accounting

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Overview of Environmental Impacts
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Overview of Environmental Impacts

(totals for all production sites in fiscal 2019; fiscal 2018 figures ...

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Fiscal 2019 Environmental Performance Data
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Fiscal 2019 Environmental Performance Data

Production volume and energy consumption intensity * Compar...

Environmental Preservation
Performance data of each site
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Performance data of each site

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