Two-phase flow venting from reactor vessels

This paper provides an overview of the emergency relief requirements for reactor vessels under runaway conditions. The importance of utilizing appropriate thermokinetic data in providing the necessary energy release rate and pressure generation rate is emphasized with experimental styrene data. The...

Full description

Saved in:
Bibliographic Details
Published in:Journal of loss prevention in the process industries 1989, Vol.2 (2), p.78-86
Main Authors: Leung, J.C., Fisher, H.G.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Exact sciences and technology
flashing flow
Safety
two-phase flow
vents
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper provides an overview of the emergency relief requirements for reactor vessels under runaway conditions. The importance of utilizing appropriate thermokinetic data in providing the necessary energy release rate and pressure generation rate is emphasized with experimental styrene data. The effect of two-phase flow venting on reducing the volumetric flow capacity of a pressure relief device is clearly elucidated. In addition, the paper presents a concise and unified treatment of two-phase flashing flow in the form of formulae and design charts covering single component fluids, multicomponent mixtures, nozzles, long pipes, elevation changes, and back pressure effects. Finally, the effect of allowing for the overpressure in lowering the required relief area during two-phase venting relative to the no overpressure case can be quickly assessed via the proposed normalized relief sizing formula.
ISSN:0950-4230
DOI:10.1016/0950-4230(89)80003-8