Base year for non-CO2 greenhouse gasses: Mitsubishi Electric Corporation and affiliates in Japan, fiscal 2001; overseas affiliates, fiscal 2006.
Toward reducing CO2 originating from energy, our activities focus on systematically introducing and updating high-efficiency and energy-saving equipment, improving operations, and extending energy conservation measures to production lines. As a result, we have controlled the increase in CO2 originating from energy to 50,000 tons as opposed to the 100,000 tons initially anticipated.
Half of the major achievements were realized through the introduction of high-efficiency machinery, while activities to develop energy-efficient technologies implemented by the Energy Savings Subcommittee also produced solid results. These activities also focus on visualizing and reducing the wasteful use of utilities and production equipment during non-operational hours.
In the classification system (SABC assessment) based on Japan’s Energy Savings Law, 16 out of 19 specific Group companies in Japan, including Mitsubishi Electric, have been recognized as excellent business operators (S Class) in terms of energy conservation.
This works manufactures semiconductor lasers and high-frequency devices, as well as engages in R&D activities for key devices used in optical fiber and wireless communications. Accompanying a renewal of the layout of production facilities, measures were taken to improve productivity and energy conservation.
The review of production lines was taken as an opportunity to launch an energy-saving campaign. The production and facilities divisions worked together, thinking outside the box, and everyone cooperated in coming up with ideas and implementing energy-saving initiatives, including a stringent review of requirements for cleanroom operations. As a result, CO2 emissions were reduced by 2.9% in fiscal 2019. Energy conservation measures for normal operations times were also extracted through the campaign, leading to even more energy-saving activities.
High-Frequency & Optical Devices Works
Three types of non-CO2 greenhouse gases are emitted by the Mitsubishi Electric Group in its business activities: SF6 (sulfur hexafluoride), HFCs (hydrofluorocarbons), and PFCs (Perfluorocarbons). SF6 is used inside gas-insulated switchgear for electrical insulation, as well as in the etching process during semiconductor and liquid-crystal display production.
HFCs are used as refrigerants in air conditioners and refrigerators, while PFCs are used during the etching process in production of semiconductors and liquid-crystal displays.
In fiscal 2019, we continued our initiatives for switching to the use of refrigerants with lower GWP, improving operations, and achieving greater gas recovery and abatement. Owing to these measures, emissions turned out to be 85,000 tons less than our initial prediction, which anticipated a year-on-year increase due to growth in business. In total, emissions were reduced by 10,000 tons from the previous term.
Mitsubishi Electric has been named an A-List company in the CDP "Climate Change" program, as well as in the CDP "Water" category, for the third consecutive year (i.e., fiscal 2017-2019). The CDP awarded us this highest evaluation in recognition of our actions to reduce greenhouse gas emissions and mitigate climate change. We have also been recognized as a CDP Supplier Engagement leader. We will continue to press forward with our efforts to contribute to the creation of a sustainable society.