May 2021

Special Focus: Maintenance and Reliability

Isentropic effects: Application and simulation

A process safety risk in industry is having unknown problems that are not accounted for.

Parvin, E., Robinson, A., Parv Process Consulting and Engineering

A process safety risk in industry is having unknown problems that are not accounted for. Although the cause of many issues can be determined, others cannot be quantified without awareness. This article reviews an issue with high-velocity gases in piping systems, otherwise known as isentropic or kinetic effects. This issue can be difficult to detect and is often missed in most process engineering evaluations. It can result in temperature variances that metals, soft goods or internals in a system are not designed to tolerate. Most process simulations are not suited for identifying isentropic effects or require the implementation of a non-default setting. To avoid “traps” from simulations and a

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