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. From 2022 onwards, we have begun to work out the greenhouse gas emissions of the H.Q., Tayuan Plant, and Meter Center in accordance with ISO14064-1, and eventually have a complete grasp of the company’s greenhouse gas emissions.
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 H.Q., Tayuan Plant, and Meter Center 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 2021 was 20,973.13 tons CO2e which is 186.34 tons CO2e (0.09%) reduction than in 2020. The emissions from Scope 1 (diesel, LPG and fuel oil) were 1,616.52 tons CO2e, and from Scope 2 (purchased electricity) were 19,356.61 tons CO2e.

▲ GHG emissions of Tatung Company

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 2021, Tatung reduced about 969,514 kwh of purchased electricity consumption via 4 dimensions which equals to 3,490.25 GJ. The saved electricity contributed as much as 486.70 tons CO2e reduction.

Status of Tatung's ISO 50001

Factory Implementation year Effective and expiry date
Tayuan Plant 2016 2020.01.05～2023.01.05
Taoyuan Wires and Cables Plant 2016 2020.01.13～2022.12.27
San-Hsia Factory 2015 2021.12.24～2024.12.24

Tatung energy saving projects and results in 2021

Energy saving projects (by categories) Amount of electricity saved (kwh) Amount of electricity saved (GJ) GHG reduction (tons CO2e)
Optimized manufacturing process to reduce operation time. 335,262 1,206.94 168.30
Replaced with higher energy efficient and energy saving equipment. 479,891 1,727.61 240.91
Centralized operating areas and shut down unnecessary air conditioners and lightings. 50,034 180.12 25.12
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. 104,327 375.58 52.37
Total 969,514 3,490.25 486.70

Note: 1 kwh of electricity emits 0.502 kg CO2e.

▲ Amount of GHG reduction in the past years


The energy intensity of represented products in 2021, 4 of the 7 represented products reached the target of reducing energy intensity by 3%, and the achievement rate was 57.14%. Products that did not meet the target are Transformer/Switchgear, Lan cable, and Power cable. The energy intensity of Tatung’s operations is shown in terms of revenues; the energy intensity in 2021 is 1,002.60 GJ/100 million dollars. In terms of electric saving rate, the individual electric saving rate of the H.Q. and all factories exceeds 1%, and the average electric saving rate of the whole company is 2.26%, which has achieved the target. The summary of our energy saving plan in 2022 is as follows:

  • Tayuan Plant:
    Tayuan Plant will introduce the temperature monitoring of ice water and cooling water for the 300RT ice water host group of the central air conditioning system, and use the data of the temperature difference between the inlet and return water to establish an energy baseline, and effectively find the idle/heavy load period of the equipment to adjust the cooling temperature to achieve the maximum power saving on factory air conditioners. To promote energy conservation and carbon reduction, the Ministry of Economic Affairs will hold the “2022 Ministry of Economic Affairs Energy Conserving Award Seminar” to cultivate energy conservation technology personnel to serve the industry’s energy conservation solutions, and through energy conservation experience sharing and on-site case observation will help the visiting companies to achieve the target of saving 1% of electricity.

  • Taoyuan Wires and Cables Plant:
    In order to increase production capacity and achieve the effect of saving electricity, the 100B collecting machine and the CCV3 extruder in the wire and cable manufacturing process will be replaced this year. The new mold set will improve product yield, maintain quality and reduce the number of reworks and material waste. The load capacity will be re-planned to reduce excess horsepower. High-efficiency motors and inverters will be purchased and installed. It is estimated that 420,000 kWh of electricity can be saved per year. In response to the “Renewable Energy Development Act “, major electricity users are requested to set up renewable energy for their own use. It is expected to complete a nearly 500kW photovoltaic system within three years and working with the government and other corporates to reduce carbon emissions.

  • San-Hsia Factory:
    A set of 5,000KVA high-voltage transformers will be replaced to conserve electricity. The lighting, 200 mercury lamps (500W), in the production area, testing area and assembly area of motor products have been replaced with replaced with LED energy-saving lamps. Such improvement can not only reduce electricity from air conditioning but also reduce peak demand by about 50kW or more.

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 Energy intensity in 2021 Target achievement status in 2021 (↓3%)
Motor/Generator 51.8 MJ/HP 48.45 MJ/HP 42.25 MJ/HP 39.75 MJ/HP √
Electric cooker 35.22 MJ/Unit 34.03 MJ/Unit 34.31 MJ/Unit 33.44 MJ/Unit √
Commercial air conditioner 55.78 MJ/KW 53.05 MJ/KW 40.14 MJ/KW 42.85 MJ/KW √
Transformer/Switchgear 7,389.51 MJ/MVA 7,257.80 MJ/MVA 8,057.57 MJ/MVA 9,059.99 MJ/MVA X
Watt-hour meter
(Mechanical and digital) 		8.85 MJ/Unit 7.40 MJ/Unit 7.33 MJ/ Unit 6.61 MJ/ Unit √
Lan cable* 0.13 MJ/Meter 0.14 MJ/ Meter 0.14 MJ/ Meter 0.15 MJ/ Meter X
Power cable 15.59 MJ/Meter 11.48 MJ/Meter 16.34 MJ/ Meter 16.66 MJ/ Meter X

Note: The baseline year is 2018. √ represents the result meets the target, X represents the result does not meet the target. ＊ We adjusted the energy intensity of Watt-hour meter 2018. The reason is that the energy intensive figure in 2018 was mainly contributed from mechanical watt-hour meters. Later, in line with the government policy, the production of mechanical watt-hour meters was reduced and the production of digital watt-hour meters was increased. Therefore, the baseline year figure in 2018 was adjusted to both mechanical and digital watt-hour meters

Last update: 2022.08.11
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