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A 25-W compact fluorescent lightbulb (CFL) produces the light equivalent of a 100-W incandescent bulb. The population of North America is estimated to be about 305 million. Estimate the amount of coal
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A 25-W compact fluorescent lightbulb (CFL) produces the light equivalent of a 100-W incandescent bulb. The population of North America is estimated to be about 305 million. Estimate the amount of coal needed to light one 100-W incandescent lightbulb for each person for one year and the amount of coal that would be saved if each incandescent bulb were replaced with a CFL. Assume the coal has a NHV of 28.5 MJ · kg−1 and the power plants are 33% efficient.

User Lachlan Young
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1 Answer

5 votes

Answer:

Coal required is 101 Teragram/year.

Coal saved is 25.25 Teragram/year.

Step-by-step explanation:

1 Teragram is exactly 1000000000 kilograms.

User Michaeline
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7.3k points
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