How to Calculate Annual Value and Cost for a Power Cycle with 40% Efficiency?

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Discussion Overview

The discussion revolves around calculating the annual value and cost associated with a power cycle that operates at 40% efficiency, generating electricity at a rate of 100 MW. Participants explore the value of electricity generated, the annual fuel cost, and the implications of the difference between these two figures, including whether it represents profit. The context is primarily homework-related, focusing on theoretical and practical applications of thermal efficiency in power generation.

Discussion Character

  • Homework-related, Exploratory

Main Points Raised

  • One participant expresses uncertainty about how to start the calculations for the annual value and cost, seeking guidance on the problem.
  • Another participant suggests converting GJ to kW as a potential first step in solving the problem.
  • A participant indicates they will attempt to solve the problem later and promises to provide an answer the following day.
  • Later, the same participant claims to have figured out the solution, although no details are provided.

Areas of Agreement / Disagreement

The discussion does not reach a consensus, as participants express varying levels of understanding and progress on the problem. There is no agreement on the solution or methodology.

Contextual Notes

Participants do not clarify the assumptions needed for the calculations, such as the specific conversion factors or the relationship between thermal efficiency and the values being calculated. The discussion lacks detailed mathematical steps and definitions that could aid in resolving the problem.

brvfan20
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Homework Statement


A power cycle has a thermal efficiency of 40% and generates electricity at a rate of 100 MW. The electricity is valued at $0.08 per kW * h. Based on the cost of fuel, the cost to supply Qin is $4.50 per GJ. For 8000 hours of operation annually, determine, in $.
a. The value of electricity generated per year.
b. The annual fuel cost.
c. Does the difference between the results of parts (a) and (b) represent profit? Discuss.


Homework Equations


Thermal Efficiency = W cycle/ Q in


The Attempt at a Solution


I don't even know where to begin.
Can someone please get me on the right track.
 
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First convert GJ to KW.
 
i would solve today night ,youwould have answer tomorrow ..
faithfully
mangesh joshi
 
mangeshpjoshi said:
i would solve today night ,youwould have answer tomorrow ..
faithfully
mangesh joshi

I figured it out...thanks though!
 

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