JNTU B.Tech IV Year RENEWABLE ENERGY SOURCES Previous Question Paper (July/August - 2022 - R18)

Renewable energy sources offer significant environmental and economic benefits, though they face specific technical and operational challenges.

Advantages:

• Inexhaustible supply: Sources like solar, wind, and hydro are naturally replenished and do not deplete over time.
• Environmental impact: They produce little to no greenhouse gas emissions or pollutants during operation, helping to mitigate climate change.
• Energy security: They reduce dependence on imported fossil fuels and diversify the energy mix.
• Low operating costs: Once the infrastructure is installed, the fuel source is free, leading to stable long-term energy prices.
• Rural development: Decentralized renewable systems can provide electricity to remote areas where grid extension is not feasible.

Limitations:

• Intermittency: Solar and wind energy are weather-dependent and non-dispatchable, requiring energy storage solutions.
• High initial capital cost: The upfront investment for equipment and installation is often higher than conventional power plants.
• Energy density and land use: Renewable sources generally have lower energy density, requiring large land areas for utility-scale deployment.
• Geographic constraints: Potential is highly site-specific, often requiring long-distance transmission infrastructure to reach load centers.

Renewable energy is critical for India to balance rapid economic growth with environmental sustainability and energy independence.

Importance:

• Decarbonization: India is committed to international climate goals, such as the Paris Agreement, necessitating a shift away from coal-heavy power generation.
• Energy Security: By utilizing domestic renewable resources, India can reduce its massive import bill for crude oil and coal.
• Economic Growth: The sector acts as a catalyst for job creation in manufacturing, installation, and maintenance, while fostering technological innovation.
• Universal Access: Renewable energy is the most viable path to achieving 100% electrification in rural and hilly regions.

Potential in India:

• Solar Energy: With over 300 sunny days a year, India has vast potential, particularly in states like Rajasthan and Gujarat, supported by initiatives like the International Solar Alliance.
• Wind Energy: India possesses a long coastline with significant offshore and onshore wind potential, currently ranking among the top countries in installed capacity.
• Hydroelectric Power: The Himalayan region and major river basins provide substantial potential for both large-scale and small-hydro projects.
• Biomass and Biofuels: Given India's large agricultural base, there is significant potential for biomass-to-energy conversion, supporting both energy needs and waste management.

The Indian government has set ambitious targets, such as achieving 500 GW of non-fossil fuel capacity by 2030, reflecting the strategic priority placed on transitioning to a cleaner, more resilient energy future.