Fauskes Nomographs

Fauske[20,21] has produced nomographs (graphs) for the purpose of relief sizing. That for tempered systems is based on Fauske s sizing method for vapour pressure 

J E Huff, Emergency Venting Requirements , Plant/Operations Prog, 1 (4), 

J E Huff, Lecture Notes for Session 1 of AlChE Continuing Education Course, Emergency Relief Design Using DIERS Technology , 1994 

HA Duxbury A J Wilday, Efficient Design of Reactor Relief Systems , International Symposium on Runaway reactions, 373-393, CCPS, 1989, ISBN 0-8169-0460-X 

H Fauske, Emergency Relief System Design for Runaway Chemical Reaction Extension of the DIERS Methodology , Chem Eng Res Dev, 67, 199-201, March 1989 - 

---

The Fauske nomograph is useful for performing quick estimates and for checking the results of the more rigorous computation. 

Estimate the relief vent area using the Fauske nomograph approach for the reaction system of Example 9-5. 

Fauske [32] represented a nomograph for tempered reaetions as shown in Figure 12-35. This aeeounts for turbulent flashing flow and requires information about the rate of temperature rise at the relief set pressure. This approaeh also aeeounts for vapor disengagement and frietional effeets ineluding laminar and turbulent flow eonditions. For turbulent flow, the vent area is... 

Fauske, H. K, Generalized Vent Sizing Nomograph for Runaway Chemical Reactions, Plant/Operations Progress, 3 (4), 213-214, October 1984. 

Using Fauske s nomograph from Figure 12-35 at a self-heat rate of 6.3 K/min and a set pressure of 217.5 psia, the corresponding vent size area per 1,000 kg of reactants = 0.0008 m2. 

---