Environmental Sustainability｜Energy Management

  • Environmental Sustainability
  • Energy Management

Energy Management

Nuvoton actively reduce the environmental impact of our business operations by investing in innovative technologies and initiating layouts for renewable energy and net-zero emissions. We enhance resource use efficiency and implement waste management to respond to the continuously evolving international environmental regulations, extreme climate events, and other risks. By estimating financial impacts and planning management costs in advance, we formulate environmental strategies and build operational resilience for the company.

SDGS
SDG 7 Affordable and Clean Energy
SDG 13 Climate Action

15818000

kWh

Cumulative electricity savings from 2010 to 2023

37

%

Scope 1 and 2 greenhouse gas emissions in 2023 decreased compared to 2020

880000

kWh

Infrastructure for annual renewable energy production of

Greenhouse Gas Emission
Energy Management
Water Management
Waste Management
Air Pollution Control
Hazardous Substance Process Management

Energy Management Policy

To ensure the promotion of energy management and energy-saving projects, Nuvoton has implemented the ISO 50001 energy management system and established an energy conservation and carbon reduction working group under the Sustainable Development Committee. This working group is composed of the facilities department and related units. In addition to holding regular energy management meetings to review the current status and project progress, they also share project results and experiences with overseas plants, continuously achieving energy-saving goals.

Energy Management

Electricity is the main source of energy consumption for Nuvoton. In 2023, renewable energy accounted for 0.17% of the total energy types used by Nuvoton Taiwan, and purchased electricity accounted for 96.39%. 1To this end, through the P-D-C-A mechanism, Nuvoton aims to increase energy use efficiency and raise the proportion of renewable energy use. Various energy-saving and carbon-reduction projects have been actively launched, and the energy management system has been implemented. In 2022, the ISO 50001 energy management system was introduced and certified in 2023. Additionally, a digital transformation plan was initiated, introducing smart manufacturing systems to optimize energy smart integration; Nuvoton continues to support the procurement of energy-saving products and optimize equipment efficiency to achieve energy-saving goals.

In 2023, Nuvoton Taiwan's energy reduction ratio decreased by 0.1% compared to the baseline year (2020), while Nuvoton Japan achieved a significant energy reduction ratio over the past three years, with a 26% decrease in 2023 compared to the baseline year (2020). 2

Energy-saving measures were undertaken in four main areas
  • Install green energy equipment: Establish a solar power system, expected to generate 880,000 kWh/year.
  • Establish an energy management system: Obtain ISO 50001 certification.
  • System supply load optimization: Optimize HPA supply pressure (8.4→7.8 kgf/cm²), saving 182,000 kWh/year.
  • Prioritize energy-saving equipment when replacing old equipment.
1In 2023, Nuvoton Taiwan utilized various energy sources, including purchased electricity, gasoline, diesel, natural gas, and renewable energy, totaling 268,398 GJ. Among these, renewable energy accounted for 447 GJ, while purchased electricity constituted the majority with 258,720.38 GJ.
2The internal energy consumption of Nuvoton Japan in 2020 was 1,043,460 GJ.

Nuvoton Internal Energy Consumption and Energy Intensity Items by Region (2021-2023)

 

Nuvoton 2023 Energy Saving Results 3

Nuvoton TaiwanElectricity Saving (kWh/year)Energy Saving (GJ/year)
Solar Power Installation880,0003,168
Update High Vacuum Unit 1 to Variable Frequency Machine87,600315
Optimize HPA Supply Pressure (8.4 → 7.8 kgf/cm²)182,500657
Replace Scrubber Fan with Energy-Saving Motor10,00036
Replace P5000, Lam Units with Energy-Saving Pumps12 Units112,500405
Replace LP-P with 2 Energy-Saving Pumps30,000108
Change Hsinchu Plant Sign Projector Lights and Landscape Lights to LED1,9067
LED Change Explosion-Proof Lights to LED25,00090
Total1,329,5064,786
3The scope of the investigation includes Nuvoton Taiwan and Japan. Energy savings are calculated at 3,600 joules per kilowatt-hour.
Nuvoton Japan (Including Nagaokakyo, Uozu, Arai Plants)Electricity Saving (kWh/year)Energy Saving (GJ/year)
  • Nagaokakyo, Uozu: Use LED Lighting
  • Arai: Equip North and South Chilled Water Secondary Pumps in C Building with High-Efficiency Motors, Stop Existing Heat Source Building Absorption Chillers, Cease Operation of Existing Heat Source Building Absorption Chillers, Switch to LED Lighting, Use Air Conditioning Timers in Facility Offices
1,953,0527,031

Electricity Saving Amount and Proportion Over the Past Three Years 4

Nuvoton TaiwanUnit2020(Baseline Year)202120222023
Total Internal Energy ConsumptionGJ268,667274,447267,811268,350
Reduction Proportion% -2.2%0.3%0.1%
Nuvoton JapanUnit2020(Baseline Year)202120222023
Total Internal Energy ConsumptionGJ1,043,479989,484916,690767,478
Reduction Proportion% 5%12%26%
4The scope includes Nuvoton Taiwan and Japan. Annual energy-saving rate is calculated as follows: Annual energy-saving rate = Annual energy-saving amount / (Annual energy-saving amount + Annual electricity consumption) * 100%.

Mid- and Long-Term Energy Saving and Carbon Reduction Targets and Planned Corresponding Actions

Strategy and ContentMid-Term Target (2025)Long-Term Target (2030)
Use of Renewable EnergySolar power generation of 880,000 kWh/yearContinue to evaluate potential sites for installation
Improve Energy Use EfficiencyAchieve a cumulative energy-saving rate of 5% compared to the baseline year (2020)Achieve a cumulative energy-saving rate of 10% compared to the baseline year (2020)