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Homework Help: Thermodynamics Dual Cycle

  1. Aug 25, 2016 #1
    1. The problem statement, all variables and given/known data
    Find the maximum temperature in deg C of the dual cycle with initial temperature of 30 deg c, compression ratio of 6, cut off ratio of 2.5 and the heat addition at constant volume process of 600 kj/kg.
    y= 1.4
    cp= 1.005 kj/kgk
    cv=0.718 kj/kgk
    Qadded @ Cv = 600kj/kg
    2. Relevant equations
    isentropic compression (1-2)
    T2/T1=(V1/V2)^y-1 or T2/T1=(rv)^y-1

    3. The attempt at a solution
    process (1-2) isentropic

    T1= 303k

    solving t2

    T2=T1 (rv)^k-1

    T2 = 620.4 K

    I dont know how to solve for P1 or P2 just stuck here
  2. jcsd
  3. Aug 30, 2016 #2
    Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
  4. Sep 3, 2016 #3
    hi thanks for replying .. its all good now i manage to solve it .
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