聚焦式太阳能发电技术简介（英文版）_32页

Concentrating Solar Power (CSP) Technology Summary

Core Content

Concentrating Solar Power (CSP) is a renewable energy technology that uses mirrors to concentrate sunlight onto a receiver, generating heat and steam to produce electricity through a conventional thermodynamic cycle. Unlike solar photovoltaics (PV), CSP relies on direct normal irradiance (DNI), which is more concentrated and suitable for high-temperature applications. CSP is particularly effective in Sun Belt regions, which are located between 15° and 40° North or South of the Equator, and include areas such as the Middle East, North Africa, South Africa, the southwestern United States, Australia, India, and southern Europe.

CSP technology offers the advantage of integrating thermal storage systems, enabling electricity generation even at night or during cloudy periods. This significantly improves the dispatchability and capacity factor of CSP plants, making them more competitive with fossil fuel-based power. The four main CSP technologies are:

• Parabolic Trough (PT)
• Fresnel Reflector (FR)
• Solar Tower (ST)
• Solar Dish (SD)

PT is the most mature and widely used technology, accounting for over 90% of the global installed capacity. ST and SD technologies can achieve higher temperatures and efficiency but are less mature and more costly. FR is a newer technology with lower manufacturing and installation costs but may face challenges in thermal storage.

Main Views

• CSP Output and Demand Matching: CSP plants can align with electricity and heat demand profiles during the day in Sun Belt regions, and with thermal storage, they can supply power during off-peak hours.
• Thermal Storage Importance: Thermal storage is crucial for improving CSP's dispatchability and grid integration. It can increase capacity factors from 25-30% to over 70% in some cases.
• Cost Trends: CSP costs are expected to decline significantly due to technology learning and economies of scale. The levelised cost of electricity (LCOE) is projected to drop by 10-20% by 2015 and by 30-50% by 2020.
• Global Potential: The technical potential of CSP in Sun Belt regions is much higher than current electricity demand, suggesting opportunities for electricity export. By 2030, CSP could meet 3.8% of global electricity demand, with an average capacity factor of 39%.
• Water Requirements: CSP plants using steam cycles require significant water for cooling. Dry cooling is preferred in water-scarce regions but increases costs and reduces efficiency.
• Applications Beyond Power: CSP can also be used for industrial heat, water desalination, and enhanced oil recovery, providing additional economic and environmental benefits.

Key Information

Technology Variants

Installed Capacity and Future Projections

• Global Installed Capacity (2012): ~2 GW
• Under Construction (2012): ~15-20 GW
• Projected Installed Capacity (2020): ~150 GW
• Projected Installed Capacity (2030): ~350 GW

Cost and Efficiency

• Current Investment Costs: USD 4,200-8,500 per kW, depending on location, DNI, and storage
• PT Plants: No storage (USD 5,500-8,000/kW), with storage (USD 7,500-8,500/kW)
• ST Plants: Storage costs vary from USD 6,300-7,700/kW for 6-9 hours to USD 9,000-10,500/kW for 12-15 hours
• LCOE Ranges:
  • PT: USD 200-330/MWh
  • ST: USD 170-280/MWh
• Investment and Financing Costs: Account for ~84% of LCOE

Environmental and Economic Impact

• Carbon-Free Energy: CSP is a clean energy source that can reduce CO₂ emissions.
• Local Development: CSP deployment can create local value addition through component production and job creation.
• Desalination Potential: CSP can be used for water desalination, especially in arid regions.

Challenges and Barriers

• High Initial Costs: CSP is more expensive than PV and conventional power plants.
• Water Scarcity: In many Sun Belt regions, water is a limiting factor for CSP operation.
• Policy Incentives: CSP requires supportive policies and incentives to achieve commercial competitiveness.
• Technology Maturity: While PT is mature, ST, FR, and SD are still in demonstration or development phases.

Future Outlook

• Technology Advancements: Expected to significantly reduce CSP costs by 2020, making it competitive with coal and gas.
• Energy Export Potential: CSP electricity from Sun Belt regions could be exported to high-demand areas via HVDC lines.
• Market Growth: Countries like the US, Spain, and the Middle East are leading in CSP deployment, with policies in place to support its growth.