Electrical Energy: 30-Day Output from Coal Plant

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SUMMARY

The discussion focuses on calculating the total electrical energy generated by a coal power plant that produces an average of 700.0 Megawatts (MW) of electrical power while discharging 1162.00 MW as waste heat. The correct calculation for the total energy output over a 30-day period is derived from the electrical power alone, resulting in 1.512x10^15 Joules (J) instead of the initially calculated 4.826x10^15 J. The confusion arose from including waste heat in the energy generation calculation, which is not relevant to the total electrical energy produced.

PREREQUISITES
  • Understanding of electrical power units (Megawatts and Watts)
  • Basic knowledge of energy conversion (Joules)
  • Familiarity with time conversion (days to seconds)
  • Concept of waste heat in thermodynamics
NEXT STEPS
  • Review the principles of energy calculations in power generation
  • Study the concept of waste heat and its implications in energy efficiency
  • Learn about the conversion of Megawatts to Joules for various time frames
  • Explore case studies on coal power plant energy outputs and efficiency metrics
USEFUL FOR

Students studying electrical engineering, energy analysts, and professionals involved in power generation and thermodynamics will benefit from this discussion.

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Homework Statement



A power plant burns coal and generates an average of 700.0 Megawatts (MW) of electrical power while discharging 1162.00 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period.

Homework Equations



W = J/sec

The Attempt at a Solution



Total of, 1862 MW, which are 1.862x10^9 W.
In 30 days there are 2.592x10^6 seconds.

So,
1.862x10^9 * 2.592x10^6 = 4.826x10^15 J.

I don't know why it's incorrect. This is a question from an online learning system, and it tells me this answer is wrong. Would love some help.
 
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What is your definition of waste heat?
 
Where do you see the 1862 ? It asks for generated electrical energy !?
 
gneill said:
What is your definition of waste heat?

Oh wow, I don't know why I did that. I got all the answers now, thanks!
 
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Likes   Reactions: Simon Clement

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