大同股份有限公司

GHG Emission and Carbon Reduction

GHG management

Greenhouse gases emitted by human activities have already caused global warming and led to the threat on the sustainable development. Corporations actively to reduce the greenhouse gas emissions are not only to show a responsible image to the public but also able to reduce the operation costs from running the business. In order to investigate the amount of GHG emissions thoroughly and comply with the future regulations, Tatung voluntarily implements ISO14064-1 greenhouse gas management system into the factories since 2009. So far, San-Hsia Factory, Taoyuan Wires and Cables Plant, and Taoyuan 1st Plant carry out GHG inventory and get verified by third parties based on reasonable level of assurance every year. We will implement ISO 14064-1 at the headquarters and Tayuan Plant in the future. In response to the new version of ISO 14064-1:2018, we are planning to adopt it in 2022 when working on year 2021’s GHG inventory. For the purpose of enhancing the ability to do greenhouse gas inventory in the factories, Tatung runs ISO14064-1 Internal Verification Class when necessary. We are expecting to have more well-trained employees through these classes and they are able to do the greenhouse gas inventory well and pass the verification by the third party in the future.
Due to the headquarters and Tayuan Plant have not implemented ISO14064-1, the GHG emissions (Types of GHG: CO2, CH4, N2O; Scope 3 emissions are not included) disclosed in this report are calculated as follows: the amount of energy sources disclosed in previous paragraph multiplied by each emission factor. The GWP is based on IPCC, 2007. The total GHG emission in 2020 was 22,130.45 tons CO2e which is 3,719.48 tons CO2e (14.39%) reduction than in 2019. The emissions from diesel, LPG and fuel oil were 1,447.53 tons CO2e, and from purchased electricity was 20,682.91 tons CO2e.

▲ GHG emissions of Tatung

Energy saving and GHG reduction

Global warming greatly increases the frequency of extreme weather events and directly causes impacts to the operation of a business. In order to fulfill corporate social responsibility and reduce operating costs, followed by Stage 1 energy reduction target, Tatung proposed Stage 2 energy reduction target in 2019: the energy intensity per product in 2023 will be reduced by 6% than in 2018 (baseline year).

To achieve the target, we have implemented ISO 50001 in the factories to sharpen up company's energy performance. So far San-Hsia Factory, Tayuan Plant, and Taoyuan Wires and Cables Plant have established ISO 50001. In addition, we conduct annual energy audit and report the energy consumption information to the government as well as implement energy saving projects in H.Q. and the factories. In 2020, Tatung reduced about 1.853 million kwh of purchased electricity consumption via 5 dimensions which equals to 6,671.68 GJ. The saved electricity contributed as much as 943.30 tons CO2e reduction.

▲ Status of Tatung’s ISO 50001

Energy saving projects and results in 2020

Energy saving projects (by category) Amount of electricity saved (kwh) Amount of electricity saved (GJ) GHG reduction (tons CO2e)
Optimized manufacturing process to reduce operation time. 1,223,722 4,405.40 622.87
Replaced with higher energy efficient and energy saving equipment. 285,612 1,028.20 145.38
Centralized operating areas and shut down unnecessary air conditioners and lightings. 287,361 1,034.50 146.27
Increased the frequency of maintenance and inspection from major energy using equipment, as well as controlled the operating time to avoid leakage or wasting of pressured air or cooled air. 30,076 108.27 15.31
Others 26,475 95.31 13.48
Total 1,853,246 6,671.68 943.30

Note: 1 kwh of electricity emits 0.509 kg CO2e.

▲ Amount of GHG reduction in the past years



▲ Energy saving project: Transformer core vacuum drier improvement in Tayuan Plant



The energy intensity achievement status of represented products in 2020, 4 of the 7 represented products reached the target of reducing energy intensity by 2%, and the achievement rate was 57.14%. Products that did not meet the target are Transformer/Switchgear, Lan cable, and Motor. In terms of electricity saving rate, the headquarters and all factories have exceeded 1%. The average electricity saving rate for whole company is 4.60% and the target is achieved. Our energy saving plan for 2021 is summarized as follows:

  • Tayuan Plant:
    The vacuum drier equipment for the production of transformers will be replaced with new ones. It is expected to be replaced by a biomass fuel boiler, and a high-efficiency and low-energy consumption burner will be used to improve the combustion efficiency. The drier door insulation system will be repaired to enhance the air-tight status. The heat conduction pipelines will be replaced and the insulation materials on the inner wall of the drier will also to be replaced to reduce heat loss. The motors and pumps used in the boiler equipment will be replaced with high-efficiency IE3 motor to improve operating efficiency. The boiler operation interface will introduce monitoring of various process parameters, accumulate historical data of related variables and compare energy consumption, establish stand-alone energy performance indicators and implements ISO 50001, and introduce automatic scheduling functions to reduce standby and heavy production losses.

  • Taoyuan Wires and Cables Plant:
    Improve the transmission equipment of the stranding machine used in the process, replace the old DC motor with a AC inverter motor to save electricity, and change the existing transmission aluminum belt to a rubber belt in the middle of the process to reduce the motor load and introduce frequency conversion control and reduce man-hours during maintenance to save energy.

  • San-Hsia Factory:
    eplace the old 6,000KVA high-voltage transformer in order to improve the operating efficiency. In the future, the transformer integration of the power circuit will be evaluated and the power consumption will be reduced. Air compressor equipment will be replaced with IE3 high-efficiency motors to save electricity, and gas flow meters and smart meters will be installed to monitor and establish energy indicators, and repair air compressor pipeline leakage during annual maintenance to reduce power consumption.

  • Taoyuan 1st Plant:
    The high-pressure air compressor will be replaced by a nitrogen high-pressure air compressor, and the booster will be replaced with an IE3 high-efficiency motor. The pre-pressurization of the compressed air will be replaced with existing liquid nitrogen, which can reduce the power consumption of the booster due to gaseous nitrogen is a dry, low-temperature gas, the original cooling system and dryer are no longer needed. Introduce 5MW energy storage system and cooperate with the government to suppress peak power consumption, help stabilize the frequency of Taipower's power system and meet the requirements of the renewable energy development regulations.

Achievement status of Stage 2 Energy Saving Target (Year 2023 ↓ 6%)

Represented products Energy intensity in baseline year (2018) Energy intensity in 2019 Energy intensity in 2020 Target achievement status in 2020 (↓2%)
Motor/Generator 51.8 MJ/HP 48.45 MJ/HP 42.25 MJ/HP √
Electric cooker 35.22 MJ/Unit 34.03 MJ/Unit 34.31 MJ/Unit √
Commercial air conditioner 55.78 MJ/KW 53.05 MJ/KW 40.14 MJ/KW √
Transformer/Switchgear 7,389.51 MJ/MVA 7,257.80 MJ/MVA 8,057.57 MJ/MVA X
Watt-hour meter 7.49 MJ/Unit 7.40 MJ/Unit 7.33 MJ/ Unit √
Lan cable＊ 0.13 MJ/Meter 0.14 MJ/ Meter 0.14 MJ/ Meter X
Power cable 15.59 MJ/Meter 11.48 MJ/Meter 16.34 MJ/ Meter X

Note: The baseline year is 2018. √ represents the result met the target, X represents the result did not meet the target.
＊Lan cable has adjust the baseline year data due to originally “per box” was mistakenly used as the production unit of the Lan cable, it has been adjusted back to the “per meter” as the unit, together with the adjustment of the 2019 data

Last update: 2021.11.01
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