Conventional Sources of Energy: Types, Advantages and Disadvantages

Conventional sources of energy are the sources that have been used by people for a very long time to meet their energy needs. You might wonder how electricity is produced or what powers buses, trains, and factories? Most of these activities depend on conventional energy sources.

These sources have helped countries grow and develop industries. However, many of them are available in limited amounts and may get exhausted in the future. This article explains the different types of conventional sources of energy, their uses, and their importance in simple words.

Table of Contents

• What is Conventional Source of Energy
• Types of Conventional Sources of Energy
• Advantages of Conventional Sources of Energy
• Disadvantages of Conventional Sources of Energy

What is Conventional Source of Energy

The sources of energy that have been used by humans for a very long time and can be stored for future use are called conventional sources of energy. Most of these sources are non-renewable, which means they are available in limited amounts and cannot be replaced quickly once they are used.

In simple words, 

“Conventional sources of energy are traditional energy sources that have been used for many years to provide heat, electricity, and fuel for transportation and industries.”

For example, coal, petroleum, natural gas, electricity, thermal power, cow dung, and straw are conventional sources of energy. Even today, many industries and power plants depend heavily on coal and oil to meet their energy needs.

Read More: Sources of Energy 

Types of Conventional Sources of Energy

Conventional Sources of Energy are broadly divided into two categories based on their availability and cost. Some sources need to be purchased and are widely used in industries and transportation, while others are freely available and mainly used in rural areas.

Conventional sources of energy are divided into two categories, 

1. Commercial Energy Sources
2. Non-Commercial Energy Sources

Now let's discuss them one by one, 

Commercial Energy Sources

Commercial energy sources are those for which people need to pay money. These sources are widely used in homes, industries, and transportation.

Coal

Coal is one of the oldest and most important sources of energy. It is a black rock that contains a large amount of carbon.

Uses of Coal

• Producing electricity
• Running industries
• Making steel and cement
• Producing heat

India is one of the leading producers of coal in the world. Large coal deposits are found in Jharkhand, Odisha, West Bengal, and Madhya Pradesh.

But why is coal important? It can produce a large amount of energy at a low cost. However, burning coal releases smoke and harmful gases into the atmosphere.

Petroleum

Petroleum is also called crude oil. It is often known as liquid gold because of its great value. Have you ever noticed that most vehicles run on petrol or diesel? These fuels are obtained from petroleum.

Uses of Petroleum

• Running cars and buses
• Fuel for airplanes and ships
• Making plastics
• Manufacturing chemicals and medicines

Petroleum is mainly found in Assam, Gujarat, and offshore areas near Mumbai.

Natural Gas

Natural gas is another important conventional source of energy. It mainly contains methane gas and is considered a cleaner fuel than coal and petroleum.

Uses of Natural Gas

• Cooking in homes
• Producing electricity
• Manufacturing fertilizers
• Fuel for vehicles

Although natural gas causes less pollution, its reserves are limited and it is not available everywhere.

Electricity

Electricity is one of the most commonly used forms of energy in daily life. Imagine a day without electricity. There would be no lights, fans, televisions, or mobile charging.

Uses of Electricity

• Lighting homes
• Running machines
• Operating computers
• Cooling and heating appliances

Electricity can be produced from different sources such as coal, water, natural gas, and nuclear energy.

Thermal Power

Thermal power plants generate electricity by burning fuels such as coal, oil, or natural gas.

How Does a Thermal Power Plant Work?

1. Fuel is burned to produce heat.
2. Heat converts water into steam.
3. Steam rotates turbines.
4. Turbines generate electricity.

Thermal power plants supply a large amount of electricity in many countries. However, they also release carbon dioxide and other harmful gases.

Nuclear Energy

Nuclear energy is produced by splitting atoms of radioactive elements such as uranium. A small amount of uranium can produce a huge amount of energy.

Uses of Nuclear Energy

• Generating electricity
• Scientific research
• Space missions
• Medical applications

India has nuclear power plants in Kaiga (Karnataka), Kota (Rajasthan), Narora (Uttar Pradesh), and Kalpakkam (Tamil Nadu).

Nuclear energy produces very little air pollution, but the disposal of radioactive waste remains a major challenge.

Non-Commercial Energy Sources

Non-commercial energy sources are those that are generally available free of cost. They are mostly used in rural areas.

Fuel Wood

Fuel wood is one of the oldest sources of energy used by humans. In many villages, people still use firewood for cooking and heating.

Uses of Fuel Wood

• Cooking food
• Heating homes
• Small-scale industries

Trees store solar energy during their growth. When wood burns, this stored energy is released as heat. However, excessive cutting of trees for fuel wood can lead to deforestation.

Cow Dung and Agricultural Waste

Materials such as dried cow dung, straw, and crop residues are also used as sources of energy, especially in rural areas.

Uses of Cow Dung and Agricultural Waste

• Cooking food
• Producing biogas
• Heating purposes

These sources are easily available and inexpensive, but burning them can cause indoor air pollution.

Advantages of Conventional Sources of Energy

Conventional sources of energy, such as coal, petroleum, and natural gas, have been used for many years because they provide a large amount of energy and can meet the growing energy needs of the world.

• High Energy Production: These sources produce a huge amount of energy from a small quantity of fuel. For example, a small amount of coal or oil can generate a large amount of electricity.
• Reliable Source of Energy: Conventional sources can provide energy continuously. They do not depend on weather conditions like sunlight or wind, making them a dependable source of power.
• Easy Storage and Transportation: Fuels such as coal, petroleum, and natural gas can be stored and transported from one place to another through trucks, trains, ships, and pipelines.
• Well-Developed Infrastructure: Power plants, oil refineries, and transportation systems for conventional energy sources have been developed over many years. This makes their use easier and more efficient.
• Helps in Maintaining Electricity Supply: Thermal and nuclear power plants can quickly increase or decrease electricity production according to demand. This helps maintain a steady supply of power.
• Supports Industries and Economic Growth: Many industries depend on conventional sources of energy for manufacturing and transportation. These energy sources also create employment opportunities for millions of people.
• Cost-Effective for Large-Scale Power Generation: Since the technology and infrastructure already exist, producing electricity from conventional sources is often cheaper for meeting large energy demands.
• Available Throughout the Year: Unlike some renewable sources, conventional sources of energy can be used at any time of the day and during any season, making them suitable for continuous energy production.

Disadvantages of Conventional Sources of Energy

Although conventional sources of energy are useful, they also have several drawbacks that affect both people and the environment.

• Cause Environmental Pollution: Burning coal, petroleum, and natural gas releases harmful gases such as carbon dioxide and sulphur dioxide. These gases cause air pollution and contribute to global warming.
• Limited Availability: Most conventional sources of energy are non-renewable. They take millions of years to form and cannot be replaced quickly once they are used up.
• Depletion of Natural Resources: Continuous use of fossil fuels is reducing the Earth's natural resources. As these resources become scarce, finding and extracting them becomes more difficult.
• Health Problems: The smoke and pollutants released from conventional fuels can cause respiratory diseases, heart problems, and other health issues in people.
• Climate Change: The large amount of greenhouse gases released by burning fossil fuels increases the Earth's temperature and leads to climate change and extreme weather conditions.
• Price Fluctuations: The prices of coal, oil, and natural gas often change due to changes in demand, supply, and international events. This can affect the cost of electricity and fuel.
• Environmental Damage During Extraction: Mining coal and drilling for oil and natural gas can damage forests, pollute water sources, and disturb natural habitats.
• Dependence on Other Countries: Many countries do not have enough fossil fuel reserves and need to import them from other nations. This can lead to economic problems and energy shortages during international conflicts.
• Risk of Accidents: Oil spills, gas leaks, and mining accidents can cause serious damage to the environment and threaten human life.

Because of these disadvantages, many countries are now encouraging the use of cleaner and renewable sources of energy such as solar and wind energy.

In this article, we have seen that conventional sources of energy are traditional energy sources that have been used for many years. Coal, petroleum, natural gas, electricity, fuel wood, thermal power, and nuclear energy play an important role in our daily lives. However, many of these resources are limited and can also harm the environment, so using energy wisely is very important.