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Reducing Total GHG Emissions

Reducing total GHG emissions

Toshiba Group proactively installed systems to collect and/or remove sulfur hexafluoride (SF6), which is used to insulate heavy electric machinery, and perfluorocarbons (PFCs), which are used to produce semiconductors. By means of this effort in FY2010, the Group succeeded in reducing the total amount of GHG emissions* by nearly 40% compared to the FY1990 level, and in subsequent years GHG emissions continued to decrease as the Group steadily took measures to improve its production processes. To reduce energy-derived CO2 emissions resulting from use of electricity, we continuously make efforts to proactively adopt energy-saving measures at our production sites, including those overseas, to improve production efficiency, as well as to introduce renewable energy.

*
Carbon dioxide (CO2), methane (CH4), dinitrogen oxide (N2O) (= nitrous oxide), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulfur hexafluoride (SF6), and nitrogen trifluoride (NF3)

Results of FY2017

Toshiba Group is working to reduce GHG emissions other than energy-derived CO2 emissions mainly by installing PFC removal equipment and due to this effort emissions have remained almost constant since FY2010. Meanwhile, energy-derived CO2 emissions were affected by deterioration in the CO2 emission coefficient for electricity due to the effects of the Great East Japan Earthquake, but the Group reduced energy consumption compared to the FY2010 level by taking proactive conservation measures, including making capital investments.

Future initiatives

The CO2 emission coefficient for electricity will continue trending higher in the future, but Toshiba Group will continue to make steady efforts to reduce total GHG emissions by investing proactively in high-efficiency equipment. The Group's goal is to reduce total GHG emissions to 1.66 million tons or less by FY2020.

Total GHG emissions

FY2017
target
FY2017
result
FY2018
target
FY2020
(Final fiscal year)
goal
1.46 million tons 1.27 million tons 1.54 million tons 1.66 million tons
Note:
The power receiving end coefficient (in Japan: 5.31t-CO2/10,000kWh) is used as the CO2 emission coefficient for electricity in the calculation of CO2 emissions. Overseas electricity is based on the GHG Protocol data.

Breakdown of total GHG emissions (FY2017)
[Image] Breakdown of total GHG emissions

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Reducing energy-derived CO2 emissions

Results of FY2017

In FY2017, energy-derived CO2 emissions amounted to 1.09 million tons. As a result of initiatives to reduce power consumption mainly through energy-saving investments and production adjustments, Toshiba Group was able to reduce energy-related CO2 emissions per unit activity to 97.8% of the FY2013 level, exceeding the initial target. by 0.2 percentage points.

Future initiatives

In order to meet growing market demand, Toshiba Group plans to introduce more facilities. Therefore, energy-derived CO2 emissions are likely to increase in the near future. The Group will continue its efforts to reduce CO2 emissions per unit activity by 8% compared to the FY2013 level in FY2020 by adopting a variety of energy-saving measures, including investing in energy-saving facilities.

Energy-derived CO2 emissions and those per unit activity

  FY2013
(Benchmark year)
result
FY2017
target
FY2017
result
FY2018
target
FY2020
(Final fiscal year)
goal
Amount emitted 1.18 million tons 1.09 million tons
Per unit production* 100% 98% 97.8% 96% 92%
Note:
The power receiving end coefficient (in Japan: 5.31t-CO2/10,000kWh) is used as the CO2 emission coefficient for electricity in the calculation of CO2 emissions. Overseas electricity is based on GHG Protocol data.
*
Values related to the energy consumption required for manufacturing (nominal production amounts, number of products manufactured, number of persons, total floor area, etc.) are used.

Breakdown of energy-derived CO2 emissions (FY2017)
[Image] Breakdown of energy-derived CO2 emissions (FY2017)

Case : Introduction of a circular heating heat pump for compressor coating pretreatment

Toshiba Carrier Corporation

In our pretreatment process for coating of compressor line, we apply degreasing and chemical conversion coating* as a treatment for the coating surface. In these degreasing and chemical conversion coatings, the degreasing liquid and chemical treatment liquid must be used after heating. Previously, we utilized steam generated from a factory boiler by the heat source. By installing our "CAONS 140 circulated heating heat pump system" to convert the heat source and discontinue the use of steam, we succeeded in reducing CO2 emissions by 310 tons per year. By also introducing various energy-saving measures, we succeeded in achieving a reduction of CO2 emissions by 540 tons per year for the entire coating pretreatment.

*
Treatment to form a coating film on the surface of the material by chemical reaction

[Image] Reduction of CO2 emissions by coating pretreatment equipment[Image] CAONS 140

Case : Energy-saving for air conditioning equipment in semiconductor clean rooms

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