Non-conventional Sources of Energy: Types, Advantages and Disadvantages

Non-conventional sources of energy are the energy sources that have come into use in recent times as alternatives to conventional sources like coal and petroleum. These sources are renewable, which means they can be used again and again because nature continuously replenishes them.

As the demand for energy is increasing and fossil fuels are getting depleted, non-conventional sources of energy are becoming more important. This article explains the types, uses, advantages, and limitations of non-conventional sources of energy in simple words.

Table of Contents

• What is Non-conventional Source of Energy
• Types of Non-conventional Sources of Energy
• Advantages of Non-conventional Sources of Energy
• Disadvantages of Non-conventional Sources of Energy

What is a Non-conventional Source of Energy

The sources of energy that have only recently come into use are called non-conventional sources of energy. These sources are renewable and do not get exhausted easily.

In simple words, if you are wondering what non-conventional sources of energy are, they are energy sources that are naturally replenished and cause less pollution.

Examples of non-conventional sources of energy include:

• Solar energy
• Wind energy
• Tidal energy
• Biogas
• Geothermal energy

India has a huge potential for producing renewable energy because of its geographical conditions and abundant sunlight.

Read More: Sources of Energy

Types of Non-conventional Sources of Energy

Non-conventional sources of energy are renewable sources that can be used repeatedly without being exhausted. India has huge potential for producing these forms of energy because of its favorable climate, long coastline, and abundant natural resources.

The major non-conventional sources of energy are discussed below.

Solar Energy

Solar energy is obtained from the Sun and is one of the most abundant sources of energy on Earth. Photovoltaic cells convert sunlight directly into electricity.

Uses of Solar Energy

• Generating electricity
• Heating water
• Cooking food in solar cookers
• Sterilising milk cans
• Running street lights and small devices

The largest solar plant in India is located at Madhapur near Bhuj in Gujarat. Rajasthan has great potential for solar energy because it receives abundant sunlight and has clear skies for most of the year.

Advantages of Solar Energy

• Renewable and inexhaustible
• Pollution-free source of energy
• Low maintenance cost
• Helps reduce the use of firewood and fossil fuels

Wind Energy

Wind energy is produced by using the force of moving air. Wind turbines convert the kinetic energy of wind into electrical energy.

Uses of Wind Energy

• Generating electricity
• Pumping water
• Irrigating agricultural fields

India is considered a wind superpower because of its long coastline and favorable wind conditions.

The major wind energy-producing states are:

• Tamil Nadu
• Gujarat
• Maharashtra
• Karnataka
• Andhra Pradesh
• Kerala
• Odisha
• Lakshadweep

The largest wind farm cluster in India is located in Tamil Nadu between Nagarcoil and Madurai.

Biogas Energy

Biogas is produced from organic materials such as animal waste, human waste, crop residues, and other biodegradable materials.

Sources of Biogas

• Cow dung
• Poultry waste
• Human waste
• Agricultural waste
• Shrubs and plant materials

Uses of Biogas

• Cooking food
• Lighting homes
• Producing electricity

The leftover material after producing biogas is used as manure in agriculture.

Biogas has great potential in the plains and hills of North India because of:

• Dense vegetation
• Large cattle population
• Abundant agricultural and human waste

Biomass Energy

Biomass energy is obtained from plant materials and organic waste.

Sources of Biomass

• Rice husk
• Bagasse (sugarcane waste)
• Farm waste
• Urban waste
• Sewage

Fast-growing shrubs and trees with high heat-producing capacity are also grown on wastelands to generate biomass energy.

Uses of Biomass Energy

• Electricity generation
• Cooking fuel
• Industrial purposes

Tidal Energy

Tidal energy is produced by using the rise and fall of ocean tides. Dams called floodgates are built across sea inlets to trap water during high tides. When the water flows back to the sea, it passes through turbines and generates electricity.

Uses of Tidal Energy

• Generating electricity in coastal areas

In India, the Gulf of Kutch and the Gulf of Cambay provide suitable conditions for producing tidal energy. A tidal power project has also been planned in the Gulf of Kutch.

Geothermal Energy

Geothermal energy is the energy obtained from the heat present inside the Earth.

In some places, underground water gets heated by hot rocks and rises to the surface in the form of hot springs and steam. This steam is used to rotate turbines and generate electricity.

Uses of Geothermal Energy

• Generating electricity
• Running cold storage plants
• Heating purposes

India has several hot springs that can be used for geothermal energy production.

Two important experimental geothermal projects in India are located at:

• Parvati Valley near Manikarn, Himachal Pradesh
• Puga Valley, Ladakh

Advantages of Non-conventional Sources of Energy

Non-conventional sources of energy are becoming increasingly important because they are clean, renewable, and can meet future energy demands without harming the environment. These energy sources offer several benefits over conventional sources of energy.

• Renewable and Inexhaustible: Sources such as solar energy, wind energy, and tidal energy are naturally replenished and can be used repeatedly without getting exhausted.
• Environment Friendly: Most non-conventional sources produce very little pollution and release fewer greenhouse gases, helping to reduce global warming and climate change.
• Low Operating Cost: Although the initial installation cost may be high, the energy sources themselves, such as sunlight and wind, are available free of cost, making them economical in the long run.
• Reduces Dependence on Fossil Fuels: The use of renewable energy helps conserve conventional energy resources like coal, petroleum, and natural gas.
• Provides Energy Security: Countries can generate energy using their own natural resources, reducing dependence on imported fuels and ensuring a stable energy supply.
• Useful in Remote Areas: Non-conventional sources can provide electricity to villages and remote regions where extending power lines is difficult.
• Creates Employment Opportunities: The renewable energy sector generates jobs in manufacturing, installation, operation, and maintenance of energy systems.
• Supports Sustainable Development: These energy sources meet present energy needs without harming the environment or reducing resources for future generations.
• Encourages Decentralized Power Generation: Small solar panels, biogas plants, and wind turbines can produce electricity locally and reduce the need for large power plants.

Disadvantages of Non-conventional Sources of Energy

Although non-conventional sources of energy are environmentally friendly, they also have certain limitations that make their large-scale use difficult in some areas.

• Depend on Weather Conditions: Sources such as solar and wind energy cannot produce energy continuously because they depend on sunlight, wind speed, and seasonal changes.
• High Initial Cost: Setting up solar panels, wind turbines, and other renewable energy plants requires a large amount of money in the beginning.
• Need Large Areas of Land: Solar farms and wind farms require vast open spaces to generate electricity on a large scale.
• Limited to Certain Locations: Some non-conventional sources can only be used in specific regions. For example, tidal energy requires coastal areas, while geothermal energy is possible only where underground heat is available.
• Energy Storage Problems: Since renewable energy is not available all the time, expensive storage systems such as batteries are needed to store excess energy.
• Lower and Variable Power Output: The amount of electricity generated can change from time to time, making it difficult to provide a continuous supply of power.
• High Maintenance and Technology Requirements: Advanced technology and skilled workers are often needed to install and maintain renewable energy systems.
• Can Affect the Environment: Although they are cleaner than fossil fuels, large solar plants, wind farms, and dams may affect local wildlife and natural habitats.
• Not Widely Used in Heavy Industries: Due to storage problems and irregular power generation, many large industries still depend on conventional sources of energy..

In this article, we learned that non-conventional sources of energy are renewable energy sources that can be used repeatedly without getting exhausted. Solar energy, wind energy, tidal energy, biogas, and geothermal energy are important alternatives to conventional energy sources and play a major role in protecting the environment.