1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Compare efficiencies of petrol/Dieselstirling

  1. Oct 4, 2011 #1
    1. The problem statement, all variables and given/known data

    FOR THE SAME HIGH AND LOW OPERATING TEMPERATURE LIMITS, compare the efficiencies of petrol , Diesel, and stirling engines

    2. Relevant equations

    3. The attempt at a solution
    the efficiency of petrol as i found is : η=1-[1/(r^(δ-1))]
    the efficiency of Diesel : η={1-[1/(r^(δ-1))]}* {((αδ)-1)/(δ(α-1))
    stirling : η= R Ln(v2/v1)(T2-T1)/ Cv(T2-T1)+R T2 Ln (v2/v1)

    So how can i compare them mathematically ?
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted