美国可再生能源前景（英文版）_118页_6mb

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REmap 2030: United States of America Summary

Core Content

REmap 2030 is a comprehensive global roadmap developed by the International Renewable Energy Agency (IRENA) to double the share of renewable energy in the world's energy mix by 2030. This report provides a detailed analysis of the United States' renewable energy prospects, potential, and policy landscape, emphasizing the country's role in achieving this global target.

Main Points

Renewable Energy Potential: The US has significant renewable energy potential in wind, solar, geothermal, hydro, and biomass, and can lead the global transition to clean energy.
Current Share: In 2010, renewable energy accounted for 7.5% of the US total final energy consumption (TFEC), with 2.5% from renewable power, 1.6% from liquid biofuels, and 3.4% from solid biomass.
Target Share: Under the REmap 2030 scenario, the renewable energy share in TFEC could reach 27% by 2030, which is three times the current level.
Power Sector Growth: The share of renewable power could increase from 14% in 2010 to 50% by 2030, with wind and solar PV being the main drivers. Wind capacity is expected to grow fivefold, from 63 GW in 2014 to 314 GW by 2030, and solar PV could increase 60 times from 2010 levels.
Cost-Effectiveness: The transition to renewables is cost-neutral when considering external costs like health impacts and environmental damage. It could save the US economy USD 30-140 billion per year by 2030.
CO₂ Emissions Reduction: REmap 2030 could reduce US CO₂ emissions by 30% compared to 2030 projections, or 33% compared to 2005 levels, which aligns with the Obama Administration's climate goals.
Investment Requirements: To achieve the REmap 2030 target, the US would need an additional USD 38 billion per year in energy capacity investments, resulting in a total investment of USD 86 billion per year.

Key Technologies and Sectors

Wind: Offers the greatest growth potential, especially in the Midwest. REmap 2030 envisions 314 GW of onshore wind and 40 GW of offshore wind by 2030.
Solar PV and CSP: Solar PV is expected to reach 135 GW by 2030, with concentrated solar power (CSP) also playing a role. Solar thermal technologies could see a tenfold increase in capacity.
Biomass and Biogas: The US has vast potential for biomass use, especially in heating and transport. REmap 2030 suggests an increase in biomass capacity by 46 GW, with industrial co-generation contributing significantly.
Geothermal: The US has some of the best geothermal resources, but only 10% are currently used. REmap 2030 aims for an additional 18 GW of geothermal power.
Hydro: While hydropower is the largest renewable power source, there is limited potential for new large-scale projects. Retrofitting and upgrading existing dams, as well as new run-of-river projects, could enhance its contribution.
Transport: The US could significantly increase biofuel production to 39 billion gallons by 2030, with 60% of the growth coming from advanced bioethanol. Electric vehicles (EVs) are also expected to grow to 27 million by 2030, compared to 5 million under current projections.
Buildings and Industry: Renewables in the form of bioenergy, solar thermal, and geothermal heat could meet 55% of the US renewable energy demand by 2030, mainly for heating and cooling.

Policy and Recommendations

IRENA outlines five key policy areas for accelerating the renewable energy transition in the US:

Planning Transition Pathways: Develop long-term, credible, and attainable strategies to support renewable growth.
Creating an Enabling Business Environment: Ensure policy consistency, predictability, and transparency to attract investment.
Integrating Renewable Energy into the System: Enhance grid reliability with technologies like energy storage, smart grids, and responsive load.
Creating and Managing Knowledge: Expand awareness and education programs for users, installers, and manufacturers.
Unleashing Innovation: Support R&D and financial mechanisms to drive the development and deployment of cost-effective technologies.

Barriers and Opportunities

Transmission Challenges: High investment costs and long permitting processes are barriers to integrating variable renewable sources.
Biomass Supply Chain: Improvements in recovery operations and logistics are needed to meet growing biomass demand.
Inertia in Energy Systems: Transition depends on capital stock turnover, which varies by sector. This requires a shift from conventional to renewable energy sources.
Stranded Costs: Avoiding stranded costs is crucial as conventional plants reach the end of their operational life.

Conclusion

REmap 2030 presents a realistic and achievable pathway for the US to significantly increase its renewable energy share. It emphasizes that renewable energy is not just an option but a necessity for a sustainable, healthy, and economically viable future. With the right policies, investments, and technological advancements, the US can lead the global renewable energy transition and contribute to a cleaner, more resilient energy system.

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