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

Nuclear Fusion Question?

  1. Nov 25, 2009 #1
    Hi all,

    I've been given an assignment to calculate the temperature increase of the fusion reactor walls in some theoretical event. It is a 30keV plasma energy in which the heat of the entire plamsa is instantaneously dropped on the wall. I can calculate volume of the wall and have the given density as well as specific heat.

    My approach:

    Cp = specific heat (J/kg*K) = 460
    rho = density (kg/m3) = 7600
    V = volume (m3) = 29.61
    P = plasma energy (eV) = 30,000
    and q is conversion of eV to J (1.602x10-19)

    T increase = (P * q) / (Cp * rho * V)

    I end up some ridiculously low # of x10-24 degree celcius (or K) increase. I know that these are using very little mass at any given time, but with a plasma temperature of ~3X108 I expected some reasonable value. Is what I am doing correct or am I way out in left field with my thinking?

    Appreciate the help.
     
  2. jcsd
  3. Jul 18, 2017 #2
    Hi,
    This is extremely late, but whatever.
    30 KeV refers to energy per particle in the plasma. Your formula is correct on a per particle basis, and it gives 4.643*10^-23 K increase per particle of plasma. Extrapolating to, for example, on mole of plasma, gives 27.962 K increase. These numbers are small because youre heating a few hundred tons of wall material.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Nuclear Fusion Question?
  1. Nuclear fusion (Replies: 1)

Loading...