Regarding efficiency of heat engines

  • #1
I tried to calculate the efficiency of a engine using the formula :
Efficiency = (Net Work Done) / (Heat absorbed)

And then I tried to calculate the efficiency of respective Carnot engine by two ways :
1) Efficiency = (Net Work Done) / (Heat absorbed)
2) Efficiency = 1 - (Temperature Lowest / Temperature Highest)

But the efficiency I am getting by the two methods different.How is this possible?
 

Answers and Replies

  • #2
SteamKing
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I tried to calculate the efficiency of a engine using the formula :
Efficiency = (Net Work Done) / (Heat absorbed)

And then I tried to calculate the efficiency of respective Carnot engine by two ways :
1) Efficiency = (Net Work Done) / (Heat absorbed)
2) Efficiency = 1 - (Temperature Lowest / Temperature Highest)

But the efficiency I am getting by the two methods different.How is this possible?
Beats me.

This is exactly why the PF Rules state that the Homework Template should be filled out completely, so that HW helpers don't have to extract information piece by piece from users.

Please use the HW template and post the complete problem statement you are working on along with your work which has led to an irreconcilable result.
 
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  • #3
Beats me.

This is exactly why the PF Rules state that the Homework Template should be filled out completely, so that HW helpers don't have to extract information piece by piece from users.

Please use the HW template and post the complete problem statement you are working on along with your work which has led to an irreconcilable result.
Sorry for the extremely late reply...check this out...here is what I attempted...
 
  • #4
SteamKing
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Science Advisor
Homework Helper
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Sorry, it looks like your work didn't make it into your post. :frown:
 

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