Context and important question
- Background: Worldwide climate goals and goals for energy -independence goals lead to an enormous urge for renewable energy.
- Core problem: Are Silicone Photovoltaic (SI-PV) still the best option, or should we invest Next-Gen Solar Technologies With a higher efficiency and lower impact on the environment?
Relevance: GS 3 (Environment and Ecology)
Silicon Photovoltaics (SI-PV): Overview
- Invented: 1954, Bell Labs (US).
- Efficiency:
- Lab -Efficiency: 18-21%.
- Efficiency from the real world (in the field): 15-18%.
- Global production:
- 80% of the delivery of China.
- India: Domestic capacity ~ 6 GWare expected to rise.
Efficiency versus land restrictions
- Efficiency is important: Doubling efficiency → halves of land requirement.
- Land Crunch:
- Fast urbanization.
- Environmental problems that limit the expansion of the Zonne -Zonne -Zonne -Zonne.
- Implication: The lower efficiency of Silicon PV makes it less viable in space reduction or much sought after areas.
Alternative photovoltaic technologies
- Gallium arsenide (mesh) thin film: up to 47% efficiency.
- Commercial reading: Many Next-Gen PVs are Lab testing, ready for demonstrationAnd awaiting commercial implementation.
Energy and climate dynamics
- Renewable Energy installed (India): 4.45 TWH (against the end-2024).
- Atmospheric CO₂: increased from 350 ppm (1990) to ~ 425 ppm (2025).
- Implication: Renewable expansion does not keep pace with the demand for energy.
Green hydrogen: promise versus reality
- Production method: Electrolysis using renewable power.
- Challenges:
- Electrolysis is Energy-intensive.
- Storage and transport Hydrogen is difficult (leaking, low density).
- Energy cascade losses: From SI-PV → electrolysis → Storage → Reconversion = Composite inefficiencies.
Proposed alternatives
- Molecular carriers: convert H₂ to green ammonia (NH₃) or green methanol (Ch₃OH) for transport.
- But reverse conversion still requires high energy.
- Artificial photosynthesis (APS):
- Produce fuels directly from H₂Over₂/N₂ and sunlight.
- Still in Laboratory, but promising for the future.
- CO₂ Recycling: Change CO₂ into useful fuels = climate mitigation + energy solution.
Europe‘S Lead: RFNBO
- Renewable fuels of non-biological origin (RFNBO):
- Fuels made using renewable energy But Not of biomass.
- Including green hydrogen, methanol, ammonia from sunlight and air.
- Policy penetration: India insisted on reducing the dependence on 85% energy import.
India‘S Strategic needs
- Current import dependence: 85% energy (oil, coal, gas).
- Geopolitical vulnerability: Worldwide conflicts + price shocks.
- Recommendation: Ramp Up R&D expenditure, foster public-private innovation.
Conclusion and take -away restaurants
- Green hydrogen and SI-PV are useful but not enough.
- Efficiency And ENERGY ECONOMY Urgent innovation needed.
- India must diversify energy strategies to:
- Improvement of energy density.
- Optimize land use.
- Switch on cleaner, scalable fuels.
- Proactive R&D investment Today it is more cost -effective than reactive damage check tomorrow.
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