国际能源署-2023年能源效率（英）-126页_4mb

Energy Efficiency 2023 Report Summary

Introduction

• The International Energy Agency (IEA) presents the 10th annual Energy Efficiency 2023 report, analyzing global trends, policies, investments, and challenges in energy efficiency. This publication advocates policies to enhance energy security, affordability, and sustainability.

Key Global Trends

• Energy Usage and Demand: IEA tracks energy intensity progress, defined as the reduction in primary energy use per unit of GDP. In 2023, global energy intensity improved by 1.3%, below the long-term trend, primarily due to increased energy demand (1.7% growth) and policy-induced economic shifts. This followed a stronger 2% improvement in 2022.
• Regional Variations: Europe (e.g., EU, Netherlands) and the U.S. showed exceptional progress (8% & 4% respectively), while China experienced stable or slightly worsened intensity due to economic rebound and industrial growth.
• Fossil Fuel Demand: Heating and gasoline demand peaked or plateaued in many regions due to electrification, with the IEA projecting fossil fuel demand peaking soon, driven by efficiency gains and renewable adoption.

Energy Efficiency Policy Progress Updates

• Global Initiatives:
  • Governments committed to doubling energy intensity progress (from 2% to around 4% annual improvement) by 2030, formalized at events like the IEA’s 2023 Global Conference and G20/G7 summits.
  • Energy crisis-response measures, such as regulations (e.g., gas bans in new buildings) and consumer support programs (e.g., PACE schemes), accelerated efficiency actions.
• Policies Per Country:
  • Countries like Canada, China, India, and the EU strengthened building codes, vehicle standards, and industrial efficiency benchmarks.
  • Tax incentives (e.g., Inflation Reduction Act in the U.S.), demand-response schemes, and energy management systems (ISO 50001) became vital policy tools.

Sector Trends

• Transport:

  • Electric vehicle (EV) sales surged, with global EV share reaching ~18% of car sales in 2023. China and the EU led in adoption.
  • Electrification contributed to efficiency gains, but consumer behaviour and market trends need addressing to amplify progress.

• Buildings Sector:

  • Heat pump deployment increased (e.g., 75% growth in Germany/Netherlands/Sweden), reducing reliance on fossil fuels for heating.
  • Energy consumption in buildings remains high; policies for retrofits, minimum energy performance standards (MEPS), and digital tools for grid interaction are key to progress.

• Industry:

  • Energy efficiency investments have grown (over USD 50 billion in 2023), aided by MEPS and digital management systems. China leads in ultra-low emission steel production.

Key Issues for Governments: Why Slower Progress in 2023?

• Regional shifts weakened global intensity trends in 2023; while Europe and the U.S. improved, China’s economic rebound offset gains.
• Policy impacts often take years to reduce energy demand, lagging behind stock turnover of inefficient equipment.
• Consumer behaviour and technological uptake (e.g., larger homes, bigger cars) sometimes counterbalance standard efficiency gains.

Implications of Doubling Efficiency Progress

• Doubling (to ~4% annual improvement) is ambitious but achievable, drawing from existing technologies and policies. Achieving it could save USD ~7 Gt CO₂ by 2030 (20% of global emissions reductions) and reduce energy bills by one-third in advanced economies.

Challenges and Opportunities

• Cooling Demand: Rising temperatures and cooling needs (especially India) strain grids; policies must promote efficient cooling technologies.
• Digitalization: Smart grids and IoT-enhanced buildings offer flexibility and savings, but inclusive approaches are needed for equity and affordability.
• Behavioral Change: Campaigns (e.g., sobriété plans) have shown significant short-term savings, but sustaining behaviour change long-term requires ongoing policy support.

Conclusion

• Energy efficiency is central to decarbonization, affordability, and system flexibility. Accelerated policies and investments in technologies like heat pumps, EVs, and smart grids are critical to meet 2030 targets. Addressing challenges in emerging economies and scaling up international cooperation are also key priorities.