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Homework Help: Efficiency of a heat engine ?

  1. Feb 12, 2004 #1
    when i am calculating the eggiciency of a heat engine i have to convert the celicus to kelvis and used this formula

    eff = 1-(T cold/T hot)*100

    fro example 302C = 593K 610C = 883K

    eff = 1-593/883 = about 32.8% efficient

    right ?

    thanks joe
     
  2. jcsd
  3. Feb 12, 2004 #2

    Doc Al

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    You mean: eff = [1-(T cold/T hot)]*100.

    This is the efficiency of an ideal (reversible) heat engine; real engines will be less efficient.
    Right.
     
  4. Feb 12, 2004 #3

    Tom Mattson

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    Nope, 302+273=575.
     
  5. Feb 12, 2004 #4
    it was 320 not 302 but thanks
     
  6. Feb 12, 2004 #5

    Doc Al

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    Re: Re: efficiency of a heat engine ?

    Good catch, Tom. :smile:
     
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