Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Transient heat transfer in heat exchangers

  1. Jul 5, 2010 #1
    Considering an engine generating thermal heat at 140 kw and when the generation starts the thermal equilibrium of the engine will be distrubed , a radiator is installed to cool the engine this radiator cool the engine through flow of water and water is cooled inside a heat exchanger with air .
    I set a transient equation to my system but I am still unable to solve it please check my equation if it is correct and if there is anything missing .

    Qgen+mdot.cp water.(Tentring water - T exiting water)=[tex]\rho[/tex]C .V . dTengine/dt
    P.S:ignoring radiation trasfer.
    Qgen = 140 kw .
    mdot water=0.37m3/s.
    cpwater=4.1855 J/(g·K)
    C cast iron=0.46
    Rho=7870KG/m3.
    v=>volume=0.01m3.
    Initial conditions:
    at t=0sec Tengine = 45 Deg Twater entring = 30 deg c
    How can I design a radiator for such system , after solving the equation I still have 2 unknowns Thot air and T2 engine .
    From the above how can I identify the area of my heat exchanger ?
     
    Last edited: Jul 5, 2010
  2. jcsd
  3. Jul 5, 2010 #2
    Pleas I would like to know where I am wrong
     
  4. Jul 7, 2010 #3
    Nobody want to help me ?!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Transient heat transfer in heat exchangers
  1. Heat Exchanger (Replies: 13)

Loading...