Updated in October 2023
Denka has been working on the use of renewable energy for more than 100 years. Specifically, we have engaged in technological pursuits on two fronts, namely (1) leveraging hydroelectric power generation and other technologies to create renewable energy while (2) fully taking advantage of this energy in chemical manufacturing and utilizing it as a valuable energy source. In order to contribute to the preservation of the global environment through the use of these technologies, we will further focus our efforts on the use of renewable energy, one of our strengths.
In order to achieve carbon neutrality by 2050, we have begun efforts to achieve "maximum renewable energy generation output: 150 MW" by increasing hydroelectric power generation and increasing our use of green energy through new solar power generation as part of "Mission 2030". Currently, we are promoting improvements in power generation efficiency through the renewal of existing hydroelectric power plants and the introduction of new solar power generation facilities at each plant. Further, as a medium- to long-term response, we are working to accelerate our efforts to increase our use of renewable energy, focusing on the construction of new hydroelectric power plants, as well as examining the possibility of introducing wind and geothermal power generation.
FY2005 | FY2022 | FY2030 | |
---|---|---|---|
Hydroelectric | 111 | 140 | 141 |
Solar, etc. | 3 | 6 | 13 |
Total | 114 | 146 | 154 |
The Omi Plant is geographically situated amid a web of 17 hydroelectric power plants, including power plans co-owned together with Kurobegawa Electric Power Company, which boast a combined maximum output of approximately 140,000 kW, making this one of the largest private-owned power generation networks of its kind in Japan. All of these facilities employ a natural inflow type hydroelectric power generation system that ushers river water into the turbine runners and returns it to the river as soon it leaves the generator. Thanks to these features, this type of hydroelectric power plant places a relatively smaller burden on the natural environment. Moreover, hydroelectric power plants generate virtually no greenhouse gases while serving as a renewable energy source with superior energy efficiency. Thus, these power plants are capable of harmoniously coexisting with the natural environment while generating electricity in a sustainable manner. We aim to make effective use of these resources to contribute to the realization of a sustainable society.
New Omigawa Hydroelectric Power Plant (started operation in 2021)
New Himekawa No.6 Hydroelectric Power Plant (started operation in 2022)
Rationalizing the use of energy is an effective means of achieving carbon neutrality. To date, we have been making efforts to efficiently utilize energy by switching to alternative fuels at our thermal power plants, introducing high-efficiency gas turbine power generators, and promoting waste heat power generation at our cement plants. Most recently, a high-efficiency gas turbine power generator was put into operation at the Omi Plant in 2020, and a similar gas turbine started operation at the Chiba Plant in 2022.
Gas turbine power generation facilities at the Omi Plant, which began operation in 2020
Gas turbine power generation facilities at the Chiba Plant, which began operation in 2022
We began installing solar power generation facilities at our Shibukawa and Isesaki plants in Gunma Prefecture in 2013.
We are currently considering new candidate sites for each of our domestic plants and group companies. In order to quickly achieve and further increase the maximum renewable energy output of 150MW, one the non-financial KPIs in our management plan, "Mission 2030", we will promote the introduction of solar power generation facilities at the Chiba Plant and overseas offices (Singapore, etc.) and study the possibility of introducing such facilities at all our business sites.
DENKA Solar Power Shibukawa
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 | Umikawa 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 | ||
16 | New Omigawa | 8,100 | 8,100 | (FIT) | ||
17 | New Himekawa | 27,900 | Kurobegawa Electric Power Co. | 13,950 | (FIT) | |
Total maximum output | 187,690 | 140,290 | ||||
Total in-house consumption (excluding output for FIT) |
- | 117,250 | ||||
Solar | Shibukawa | 1,990 | 1,990 | (FIT) | ||
Isesaki | 1,000 | 1,000 | (FIT) | |||
Total maximum output | 2,990 | 2,990 | ||||
Thermal (LNG) | Omi | 14,000 | 14,000 | |||
Thermal (waste heat and biomass boiler) | Omi cement | 11,100 | 11,100 | |||
Thermal (Gas turbines and cogeneration) | Omi (Tomi) | 34,685 | 34,685 | |||
Chiba | 16,620 | 16,620 | ||||
Thermal (diesel) | Shibukawa | 1,000 | 1,000 | |||
Total maximum output | 77,405 | 77,405 | ||||
Total maximum output (including output for FIT) | 220,685 | |||||
Total maximum output for in-house consumption | 194,655 |
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