牛津大学教授尼克·艾尔的研究表明，全球能源系统完成电气化后，最终能源需求将从目前的416艾焦降至247艾焦，降幅约40%1。与此同时，电力需求将从110艾焦上升至189艾焦1。这一现象反映了电气化带来的能源效率提升——用更少的总能源来满足相同的服务需求。
电气化效率优势在多个关键领域体现1。电动汽车的能源转换效率约为80%，相比传统汽油车的20%提高了4倍1。在建筑供暖方面，电热泵将占90%的份额，其余10%采用氢燃料1。钢铁生产中，电弧炉的比例将从目前的25%增至50%1。然而，航运业的电气化率预计仅为10%1。这项研究基于2020年全球最终能源需求数据1，国际能源署将这一现象总结为"电气化就是效率"1。
Research conducted by Oxford University professor Nick Eyre demonstrates that global energy systems will require significantly less total energy following widespread electrification, though electricity generation itself will rise substantially.1 Final energy demand is projected to fall by approximately 40%, decreasing from 416 exajoules to 247 exajoules in a decarbonized world, while electricity demand increases from 110 exajoules to 189 exajoules.1 This efficiency gain stems from the adoption of electric vehicles, heat pumps for building heating, and electric arc furnaces for steelmaking, which deliver substantially higher energy conversion rates than their fossil fuel counterparts.1
Electric vehicles demonstrate the efficiency advantage vividly, converting approximately 80% of energy to useful output compared to just 20% for gasoline-powered engines.1 In building heating applications, 90% of requirements are expected to be met by electric heat pumps with the remaining 10% supplied by hydrogen fuel.1 The steel industry will see electric arc furnaces expand from their current 25% share to 50% of total production.1 The International Energy Agency has encapsulated this dynamic with the principle that "electrification is efficiency."1
However, the transition will not be uniform across all sectors.1 Maritime shipping faces particular challenges, with electrification anticipated to reach only 10% of the industry.1 Eyre's analysis is based on 2020 global final energy demand figures.1
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