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5.6 The Separator function: sept

Here is a listing of sept:

  function frac=sept(i1,x1in2,xs1,in)
  % sept: calculates the fractions to be used with frac
  % function frac=sept(i1,x1in2,xs1,in)
  % Argument  Gives
  % i1       index of compound that is known in the exit streams
  % x1in2    mol or (mass) fraction of i1 in the second exit stream
  % xs1      composition of the first exit stream, mol or (mass) 
fractions       
  % in       index of the inlet stream
  % sept returns in frac, the fractions to be used in SEP   
  % For addtional help and picture, see PICSEPT
  % Example: >> ti=sept(1,.1,[0.8333 0 0.1668],5);
  %          >> sep(ti,5,[4 3])
  % OKB, TYLC
  global ns
  x1=xs1(i1);
  n1=((x1in2*sum(ns(in,:)))-ns(in,i1))/(x1in2-x1);
  frac=n1*(xs1./ns(in,:));

Also see 1.5.2 The Separator Function: sept. Back to Chapter 5.

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