Fauskes method including disengagement

This method extends Fauske s method14,51 (see A5.3.2) to cases in which the system is not inherently foamy and so vapour/ liquid disengagement will occur before the reactor js empty. 

The method is for vapour pressure systems and the conditions of applicability are as given in A5.3.1, with the addition of (a) and (b) below  

In order to use the sizing method, the reactor, void fraction, aD, at which total vapour/ liquid disengagement is expected at the maximum accumulated pressure, must first be evaluated. This may be done by level swell calculation (see Annex 3) or by small-scale experiment with the same vapour superficial velocity as will occur at plant-scale (see Annex 2). Equation (A5.7)can then be used to find the relief area  

A value of the correction factor, for vent line friction, F, required by equation (A5.7) can be obtained from Table A5.1. 

5 Worked example of Fauske s method with disengagement 

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