Energy and the Environment Energy Sources: Fossil Fuels Coal

Lesson 3, Topic 1

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Coal

Abdulaziz July 15, 2020

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Non-renewable energy

Coal
Oil
Gas
- Conventional
- Unconventional
- CNG , LNG

Types of coal

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This image has an empty alt attribute; its file name is image-111.png — https://www.uky.edu/KGS/

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Coal mining methods

This image has an empty alt attribute; its file name is image-113.png — https://www.uky.edu/KGS/

Continuous miner
- Network of rooms
- Pillars are coal left to support the ‘room’
- Recovery rate of 60%

Coal bolter miner machine detail

Longwall miner
- Shearers cut & remove coal
- Temporary hydraulic roof supports hold roof
- Recovery rate of 75%
- More expensive equipment
- Limited by some geological formations

Principles of Longwall Mining (Caterpillar Global Mining)

Bucket and wheel excavator

Coal mine

Coal power

Heavy industrial coal powered electricity plant

This image has an empty alt attribute; its file name is coal20plant.jpg — https://energycentral.com/c/ec/what-are-risks-related-coal-power-plant-investment

Power Station Construction Site At Night Panorama

Why Coal ?

Coal is available, easy to use and cheap.
Cheap electricity makes all products more affordable
- lift developing countries out of poverty
Coal produce huge local pollution
- contributes to half of global CO₂ emissions