Electrical Energy: 30-Day Output from Coal Plant

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Homework Help Overview

The problem involves calculating the total electrical energy generated by a coal power plant over a 30-day period, given its average power output and waste heat discharge. The subject area pertains to energy conversion and electrical power generation.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate total energy based on power output and time but expresses confusion over the correctness of their answer. Some participants question the interpretation of "waste heat" and its relevance to the calculation. Others seek clarification on the specific values used in the calculations.

Discussion Status

The discussion is ongoing, with participants exploring definitions and interpretations related to the problem. Some guidance has been offered regarding the focus on generated electrical energy versus total energy, indicating a productive direction in the conversation.

Contextual Notes

There is a mention of an online learning system providing feedback on the original poster's answer, suggesting constraints related to the problem's setup or requirements that may not have been fully addressed.

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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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