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Burning coal requires between 100 and 150% excess air for complete combustion.
Excess air is the air supplied for combustion more then the air required for perfect combustion. Perfect combustion is the minimum amount of air, if all the oxygen is used, to completely burn the coal, (this is impossible).
Oil requires 30-50% excess air and Natural gas requires 10-30% excess air for complete combustion. So combustion of coal is less efficient than these. However, the process of generating steam and producing electricity otherwise is no less efficient than any other means.
Excess air as a result carries more heat up the stack which cannot be recovered, thus the reduction in efficiency. Overall this reduction in efficiency only amounts to about a 5% reduction in plant generating efficiency, or less.
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State why you need coal to generate electricity?
Electricity is made by converting some form of energy into electricity. Coal is used to heat water in a boiler to make steam. The steam pressure rotates a turbine to power a generator.
How do coal power stations and wind farms generate electricity?
Coal power stations burn coal to heat water to produce steam, which is then used to spin electricity turbines to generate electricity. The burning coal releases carbon dioxide.Wind farms have blades which turn in the wind to spin electricity turbines to generate electricity. There are no harmful carbon dioxide emissions.
Is a nonrenewable resource used for the generation of electricity.?
Coal
What is a major disadvantage of using coal to produce electricity?
hey
What is the number one energy source for making electricity?
Coal
State why you need coal to generate electricity?
Electricity is made by converting some form of energy into electricity. Coal is used to heat water in a boiler to make steam. The steam pressure rotates a turbine to power a generator.
Why are sheep so inefficient at converting grass into meat?
Sheep are so inefficient at converting grass into meat for a few reasons. Sheep are not meant to do this task.
What are positives and negatives about solar power?
Some positives:It provides "free" energy.It is clean as it leaves no carbon footprint.Some negatives:Current solar cells are inefficient in converting light to electricity.
How can coal be conserved?
Since coal is used for electricity you can save coal for electricity
How electricity is made from coal?
the coal fuels or powers the electricity
How do you get electrictiy from coal?
You cannot get electricity from coal. Electricity and coal are two very different types of material.
Is coal a good producer of electricity?
yes coal is a good producer of electricity.
Which is the least sustainable practice?
Using coal to generate electricity. (APEX)
Advantages of using coal to produce electricity?
Coal is abundant and easy to convert into electricity.
What day did the steam train get replaced?
It was coal burning and inefficient by today's standards.
The future of coal will it run out?
It will run out, but there is still enough supply to last over 100 years I believe which means that it really isn't a problem yet. However, we should already be converting to cleaner methods of power and electricity over coal.
Is coal iron and steel the most important industry in the world?
No, coal produces electricity, so electricity is instead of coal
