JNTU B.Tech III RENEWABLE ENERGY SOURCES Previous Question Paper (August - 2022 - R16)

Renewable energy systems harness naturally replenishing sources to generate power. The primary types include:

• Solar Energy: Converts sunlight into electricity using Photovoltaic (PV) cells or thermal collectors for heating.
• Wind Energy: Utilizes wind turbines to convert the kinetic energy of air currents into mechanical power, which is then converted into electricity.
• Hydroelectric Energy: Captures the energy of flowing water, such as rivers or dams, to drive turbines for power generation.
• Biomass Energy: Derived from organic materials like plant waste, wood, and agricultural residues, converted into heat, electricity, or biofuels.
• Geothermal Energy: Extracts heat from the Earth's interior, typically from steam or hot water reservoirs, to generate electricity or provide direct heating.
• Ocean Energy: Includes tidal, wave, and ocean thermal energy conversion, utilizing the movement and temperature gradients of seawater.

India has a rapidly expanding renewable energy sector, driven by the target to achieve 500 GW of non-fossil fuel capacity by 2030. Solar and wind energy dominate the current landscape, supported by government initiatives like the National Solar Mission and favorable policy frameworks for private investment. India currently ranks among the top countries globally in installed renewable energy capacity.

The advantages of these renewable sources over conventional fossil fuels include:

• Environmental Impact: Minimal greenhouse gas emissions, significantly reducing the carbon footprint and mitigating climate change.
• Sustainability: Sources are inexhaustible, ensuring long-term energy security compared to finite coal or oil reserves.
• Operational Costs: Once installed, the fuel cost is zero, leading to lower and more predictable long-term generation costs.
• Energy Independence: Reduces reliance on imported fuels, strengthening the national economy and trade balance.
• Decentralization: Enables off-grid solutions for remote and rural areas, improving energy access in underserved regions.