2000年-世界发展银行全球_Best_Practices_for_Sustainable_Development_of_Micro_Hydro_Power_in_Developing_Countries_126页_7mb

Summary of "Best Practices for Sustainable Development of Micro Hydro Power in Developing Countries"

Core Content

This report presents a synthesis of best practices for the sustainable development of micro hydro power (MHP) in developing countries, drawing on case studies from Sri Lanka, Peru, Nepal, Zimbabwe, and Mozambique. It outlines the economic, social, and institutional factors that influence the success and scalability of micro hydro projects.

Micro hydro is defined as a power plant with a capacity between 10 kW and 200 kW, and it is considered one of the most mature technologies in the field of decentralized energy supply. The report highlights the importance of micro hydro in providing energy access to remote and poor communities, and emphasizes that it is not only a technical solution but also a social and economic development tool.

The study identifies three key phases in the development of micro hydro:

1. Technological phase: Focuses on improving and demonstrating the viability of the technology.
2. Social phase: Aims to meet the basic energy needs of rural populations, similar to investments in health and education.
3. Financial phase: Seeks to achieve financial sustainability through appropriate pricing and cost management.

Main Forms of Support

The report extends the concept of intermediation to include:

• Technical intermediation: Ensuring the proper design and operation of micro hydro systems.
• Social intermediation: Engaging local communities and promoting participatory approaches.
• Financial intermediation: Facilitating access to funding through a mix of soft and hard money.
• Organisational intermediation: Creating an enabling environment for the growth of micro hydro.

Key Findings

1. Cost and Profitability

• The capital cost per kilowatt for micro hydro ranges from $965 to $3,085 in constant US$1998 terms, depending on whether the plant is used for mechanical power or electricity generation.
• The cost of transmission is a significant factor in the overall cost of electricity generation.
• Some micro hydro plants can be profitable without subsidies, especially those providing mechanical power for productive uses such as milling.
• Electric lighting is a major consumer demand, but it is often less profitable than other uses, creating a paradox in the industry.

2. Affordability and Social Impact

• There is a trade-off between the price of electricity and the number and type of users who can afford it.
• Subsidies are necessary in many cases, but they must be targeted and efficient to avoid market distortion.
• Poverty and gender impact are highly dependent on the choice of end-uses. Projects that power milling, irrigation, and community services (e.g., schools, health centers) tend to have a broader social impact.
• Remote locations increase the cost of micro hydro, but the cost of alternative technologies (e.g., diesel generators) may increase even more.

3. Best Practices for Implementation

Case Study Insights

The report includes detailed case studies from the five countries, each highlighting:

• The location and characteristics of the micro hydro plants.
• Financial and economic analysis of the projects.
• Key conclusions on the feasibility and sustainability of micro hydro in those regions.

Notable Observations:

• In Nepal, NGOs and agricultural cooperatives have been instrumental in driving micro hydro development.
• In Peru, non-governmental organizations and cooperatives have played a central role in the implementation and management of micro hydro projects.
• Mozambique and Zimbabwe are highlighted as new entrants to the micro hydro market, with potential for growth if the enabling environment is developed.

Conclusion

Micro hydro power has a clear niche in decentralized energy systems, particularly where small-scale water resources are available and demand is concentrated. It is financially viable in certain contexts and socially impactful in others. The report emphasizes the need for policy coherence, institutional support, and community engagement to ensure the sustainable development of micro hydro in developing countries.

It concludes that while micro hydro can provide real power for productive uses, the main demand for electricity is often social, such as lighting in health centers and schools. Therefore, best practices must balance profitability with social impact, and intermediation is key to achieving this.