Energy Resource Management

In response to global energy shortage and the urgency of GHG reduction, CWTC pushes for production machinery assessment to reduce energy consumption and drives energy efficiency improvement of plant facilities. We consolidate energy-saving proposals from all units to set relevant targets and action plans every year and periodically monitor and control our performance. Based on our energy-saving plan submitted to the Bureau of Energy, Ministry of Economic Affairs, the average energy-saving rate approved for our Taiwan site was 2.11% in 2022.
In line with the government’s promotion of renewable energy, we have increased the installed capacity of solar panels in our Kaohsiung plant by 98 kWp (0.098 mWp) in 2020 with a cumulative capacity of 107 kWp in 2022, providing 131,804 kWh. Our new Kaohsiung plant scheduled to commence production in 2023 will bring an additional installed capacity of 126 kWp for our total capacity of solar panels to reach 233 kWp. We fulfill our social responsibilities as a global citizen and as an enterprise.


  • Energy Consumption in 2022

The total energy consumption of diesel fuel, gasoline, natural gas and electricity for our plants in Kaohsiung, China and Malaysia as a whole is as follows:


  • Energy Usage Index of Production

Production equipment and facilities systems account for the majority of our electricity consumption. Within the total electricity consumption of 77 GWh in 2022, process and air conditioning took up 54% and 24% of the total consumption, respectively. In order to improve electricity efficiency, we implement energy-saving measures. The electricity consumption per unit product decreased by 19% in 2022 compared to 2021.


  • Energy-saving Measures

In response to domestic and international pressures to reduce carbon, energy consumption and GHG emissions, the Company promotes various energy-saving measures to improve energy efficiency of facilities and production equipment. The plans focus on operational efficiency optimization and parameter settings of production equipment, and adoption of energy-saving lighting. The target for 2023 is 2% of the annual electricity consumption.

We achieve energy conservation with efforts in various aspects and promote energysaving measures by phases. The short-term plans are to replace existing air conditioners with central air conditioning systems, use LED lighting at all sites, install LED motion sensor security lights, adopt motion sensor landscape ground lights for pathways, and give priority to energy-efficient facilities or ones with Level-I energy ratings. In addition, we gradually replace power-consuming equipment, such as air compressors and water chillers, with energy-efficient models, and set up a central monitoring system to manage their operation. Our medium and long-term plans are to use the central monitoring system for energy consumption control of utilities equipment and continue to introduce the latest energy-saving technologies to improve the efficiency of processes and utilities equipment.

Through energy-saving promotions (e.g., turning off lights and computers at the end of the day), energy-saving lamps are used company-wide while motion sensor lightings are employed for areas where constant lighting is not required. Employees change their daily habits to cut down energy consumption and loss.

In 2022, the Company's electricity consumption totaled 279,596GJ with an electricity intensity of 5.38 kWh/thousands of NT dollars. Due to the increase in production capacity, electricity consumption went up by 268,054GJ in 2022, whereas the electricity intensity dropped 8% compared to 2021. The results indicated the effectiveness of our energy management. In the future, we will continue to focus on plans concerning energy efficiency, adoption of renewable energy or alternative energy, etc.

  • GHG Emissions Management

In order to fulfill our social responsibilities, we voluntarily carry out GHG inventory and disclose GHG emissions every year. To meet our own targets, we adopted ISO14064-1:2018 for our 2022 GHG inventory of Taiwan site to set an example.  GHG data were consolidated using the operational control approach and verified by a thirdparty assurance agency. We continue to perform voluntary inventory at our China and overseas sites and schedule to complete the external assurance of the Group’s GHG inventory in accordance with ISO14064-1:2018 by the end of 2024.

  • GHG Emissions over the years

We adopted external inventory under ISO14064-1:2018 for the first time at Taiwan site in 2022 with voluntary inventory for Scope 1 and Scope 2 only at China and Overseas sites. The calculation of GHG emissions used the “emission factor approach” along with the Greenhouse Gas Emission Factor Table (6.0.4) of the Environmental Protection 
Administration and the IPCC AR-6.