2025年全球建筑节能行业发展现状 建筑行业的能源消费及碳排放比重下降【组图】

Global Building Energy Efficiency Industry Overview - The global building energy efficiency industry has experienced a growth trend in investment from 2017 to 2023, despite a decline in 2018 due to the U.S. withdrawal from the Paris Agreement. In 2023, the investment scale decreased to $243.7 billion due to global economic uncertainties and geopolitical conflicts [4] - The International Energy Agency (IEA) reported that the share of renewable energy in global building energy consumption was only 6% in 2022, with a target to increase this to 18% by 2030. Achieving this target requires an annual compound growth rate of over 15%, leading to an estimated investment scale of approximately $280.3 billion in 2024 [4] Energy Consumption and Carbon Emissions - The building sector accounted for 34% of global energy consumption and 37% of global CO2 emissions in 2022. However, in 2023, the energy consumption share decreased to 28%, primarily due to reduced heating demand in warmer regions [5] - The building industry was the only sector to see a decrease in carbon emissions in 2023, with its share of global emissions dropping to 26%. The UN Environment Programme emphasized the urgent need for accelerated action in the building sector to meet global climate goals [5][7] - By 2035, the building sector is projected to contribute approximately 11% of the global emission reduction potential, equating to 4.2 Gt CO₂e [5] Energy Consumption Distribution - In 2022, global building energy consumption slightly increased to 132 exajoules (EJ), with electricity and natural gas being the primary sources. In 2023, this consumption decreased to 130 EJ, representing 32% of global energy demand [8] - The reliance on electricity continued to grow, accounting for 37% of total building energy demand in 2023, while natural gas consumption fell by over 4% [8] - The reduction in fossil fuel usage in buildings was influenced by geopolitical factors, particularly the war in Ukraine [8] Carbon Emissions Breakdown - In 2023, residential buildings accounted for the largest share of indirect carbon emissions at 10%, although this was a 1% decrease from 2022. Non-residential buildings and emissions from the construction process each contributed 8%, also down by 1% [11]