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Teflon Faa에 의해### Summary of Chapter 1: Electricity Production from Renewable Energy
**Introduction to Renewable Energy**
Chapter 1 emphasizes the critical importance of sustainability in engineering for the 21st century, particularly regarding the need for environmentally friendly electric power systems. Renewable energy sources are becoming increasingly vital in modern power systems, with wind and solar power emerging as leading contributors.
**The Electric Power Industry**
The chapter outlines the historical development of the electric utility industry, which began in the 19th century with key figures like Thomas Edison, George Westinghouse, and Samuel Insull. Edison is credited with creating the first practical incandescent lamp and establishing the Edison Electric Light Company in 1882, which focused on direct current (DC) systems. In contrast, Westinghouse promoted alternating current (AC), which allowed electricity to be transmitted efficiently over long distances. This rivalry ultimately led to the dominance of AC systems in the electric utility landscape.
Today, the electric utility model relies on monopoly franchises, large central power stations, and extensive transmission lines. Electricity generated at these facilities is typically three-phase AC at voltages ranging from 14 kV to 24 kV, which are stepped up for long-distance transmission.
**The Issue of Renewable Energies**
Several factors drive the development of renewable energies, including climate change, increasing energy demand, and the depletion of fossil fuel reserves. The chapter highlights the alarming rise in greenhouse gas emissions, particularly carbon dioxide (CO2), and the urgent need for substantial reductions to mitigate climate change impacts.
Sustainable development is defined as meeting present needs without compromising future generations' ability to meet their own needs. This concept underscores the necessity of utilizing renewable energy sources while minimizing environmental impacts associated with energy production.
**Commitments and Perspectives**
The Kyoto Protocol, established in 1997, aimed to reduce global greenhouse gas emissions by 5.2% from 1990 levels by 2010. The European Union committed to an 8% reduction in emissions and set ambitious targets for increasing the share of renewable energy and improving energy efficiency by 2020.
**Renewable Energy Sources**
The chapter categorizes various types of renewable energy:
1. **Wind Energy**: With an estimated global potential of 57,000 TWh/year, wind energy can significantly contribute to electricity generation. However, its intermittent nature necessitates integration with other energy sources.
2. **Solar Energy**: The sun provides an inexhaustible energy source, with solar radiation capable of producing 720 million TWh/year. Solar technologies include solar thermal systems and photovoltaic cells, though their efficiency varies based on geographical and climatic factors.
3. **Hydraulic Energy**: Currently the most exploited renewable source, hydraulic energy has a potential for further development. Global production was about 2,700 TWh/year, with significant capacity for expansion.
4. **Geothermal Energy**: This energy source relies on heat from the Earth’s core. High-temperature geothermal resources can be harnessed for electricity generation, although their availability is limited.
5. **Biomass**: Biomass can be a renewable energy source if managed sustainably. It is used for biofuels and can contribute significantly to energy needs, especially in developing countries.
The chapter also presents data on the contributions of various renewable energy sectors within the European Union, with biomass being the largest contributor, followed by hydraulics, wind, solar, and geothermal energy.
**Production of Electricity from Renewable Energies**
Electricity generation from renewable sources can follow different supply chains. Traditional methods often require a heat source to produce steam for turbines, while other methods, like wind and hydraulic power, convert kinetic energy directly into electricity. Power converters enhance efficiency and allow for variable-speed operation, particularly in wind and hydraulic systems.
The competitiveness of renewable energy systems is influenced by the cost of electricity production, which encompasses investment costs, operational expenses, and the lifespan of the systems. The efficiency factors of renewable technologies vary significantly, with large hydraulic systems generally achieving the highest efficiency rates compared to wind and solar systems.
### Conclusion
Chapter 1 underscores the essential role of renewable energy in addressing climate change and ensuring sustainable electricity production. It provides a historical context for the electric power industry, discusses the current state and future prospects of renewable energies, and highlights the importance of technological advancements and policy commitments in achieving sustainable energy goals.
