Jawaharlal Nehru Technological University Hyderabad B.Tech IV GREEN FUEL TECHNOLOGIES Previous Question Paper (September - 2020 - R15)

Achieving sustainable development through green technologies requires a multi-faceted approach that integrates policy, innovation, and infrastructure. Key strategies include:

• Transition to Renewable Energy: Replacing fossil-fuel-based power generation with solar, wind, and geothermal energy to reduce carbon emissions and dependency on finite resources.
• Energy Efficiency and Conservation: Implementing smart grid technologies, energy-efficient building designs, and industrial process optimization to minimize energy waste.
• Circular Economy Models: Promoting the 3R principle (Reduce, Reuse, Recycle) to minimize waste generation and ensure that materials remain in the production cycle for as long as possible.
• Sustainable Transportation: Investing in electric vehicle (EV) infrastructure, public transit systems, and biofuels to decarbonize the transport sector.
• Green Policy and Incentives: Governments must provide subsidies for green technology adoption, enforce carbon pricing, and establish strict environmental regulations to encourage corporate responsibility.
• Research and Development: Funding innovation in carbon capture, storage technologies, and advanced battery storage to overcome intermittency issues in renewable energy.
• Public Awareness and Education: Encouraging sustainable consumption patterns among citizens to drive market demand for eco-friendly products and services.

Renewable energy sources are derived from natural processes that are replenished constantly. The primary types include:

• Solar Energy: Captured using photovoltaic cells or solar thermal collectors, this energy converts sunlight directly into electricity or heat. It is abundant, inexhaustible, and increasingly cost-effective.
• Wind Energy: Harnesses the kinetic energy of air currents using wind turbines. It is suitable for both large-scale utility power plants and small-scale off-grid applications.
• Hydropower: Utilizes the gravitational force of flowing or falling water to drive turbines. It provides a stable and reliable base-load power supply.
• Biomass Energy: Derived from organic materials such as agricultural residues, wood, and organic waste. It can be converted into biofuels, biogas, or burned directly for heat and electricity.
• Geothermal Energy: Taps into the internal heat of the Earth. Steam or hot water from underground reservoirs is used to drive turbines for electricity generation or for direct heating purposes.
• Ocean/Marine Energy: Includes tidal, wave, and ocean thermal energy conversion (OTEC). These technologies exploit the movement of tides and waves or temperature gradients in the ocean to generate power.