Each TEL factory and office has an established goal of reducing energy consumption by at least 1% year-over-year. Initiatives to achieve this goal include energy-saving clean room operation, appropriate temperature settings for office cooling and heating, and the introduction of highly energy-efficient equipment. Tokyo Electron Miyagi, for instance, achieved more energy-efficient operation by installing a turbo refrigerator, resulting in a reduction of energy consumption. It set an environmental goal of reducing the power consumption of its turbo refrigerator by an average of 20% in the first half of fiscal 2017, by an average of 30% in the second half, and by an annual average of 25% (year-over-year). Tokyo Electron Miyagi achieved its goal with an average 22.6% reduction in the first half, an average 34.8% reduction in the second half, and a 26.3% reduction across the full year.
In addition, LED lighting has been installed at our factories and offices in Japan, and photovoltaic power generation systems have been installed at some of these sites, generating 4,436 MWh of renewable energy in fiscal 2017. Tokyo Electron U.S. Holdings in the United States has also been actively engaged in activities including the ongoing purchase of green power, 3,334 MWh in fiscal 2017.
As a result of these initiatives, power consumption was 253 GWh in fiscal 2017, down 0.4% year-overyear; and CO2 emissions from energy consumption* were 141 kilotons, down 4.3% year-over-year. Goals were also achieved at seven of our 11 worldwide factories and offices that had reduction goals.
* In calculating CO2 emissions, the emission factor for TEL’s electricity consumption in Japan in fiscal 2017 was substituted by adjusted emission factors for the electrical power providers concerned. The emission factor for TEL’s overseas electricity consumption was substituted by estimated factors calculated by the Federation of Electric Power Companies of Japan based on values published by the International Energy Agency (IEA).