JNTU B.Tech III NON-CONVENTIONAL ENERGY SOURCES Previous Question Paper (February/March - 2022 - R18)

Energy consumption in rural areas is primarily driven by domestic needs, agricultural activities, and small-scale cottage industries. The primary requirements include:

• Domestic Energy: Cooking remains the largest energy consumer, traditionally relying on biomass such as firewood, cow dung, and agricultural residues. Lighting and basic electrical appliances like fans and televisions represent the secondary domestic load.
• Agricultural Energy: Irrigation is the most significant energy-intensive activity, requiring power for water pumping systems. Additionally, post-harvest processing such as milling, threshing, and drying requires mechanical or thermal energy.
• Cottage Industries: Small-scale rural enterprises, such as dairy processing, weaving, and pottery, require consistent energy for heating and motive power.

To meet these demands sustainably and reduce dependence on grid-based fossil fuels or traditional biomass, the following alternative energy sources are viable:

• Biomass Energy: Utilizing biogas plants (anaerobic digesters) converts animal waste and agricultural residues into clean-burning methane gas for cooking and lighting, while simultaneously producing high-quality organic fertilizer.
• Solar Energy: Solar photovoltaic (PV) systems are ideal for decentralized electrification, providing power for lighting, mobile charging, and small appliances. Solar thermal systems, such as solar cookers and water heaters, can significantly reduce the demand for firewood.
• Wind Energy: Small-scale wind turbines or wind-pumps can be deployed in windy rural regions to assist in irrigation and mechanical power generation.
• Small Hydro Power: In regions with perennial streams or irrigation canals, micro-hydro power plants can provide reliable, continuous electricity for local communities and processing units.

Integrating these decentralized sources through hybrid systems ensures energy security, promotes rural economic development, and mitigates the environmental degradation caused by traditional fuel collection.