When working in chemical plants, failures of equipment will result in releases of toxic, flammable and explosive materials.
This course introduces several source models to describe how materials are discharged from the process. Source models are an important part of the consequence modeling.
Chemical engineering students will explore basic source models and learn how to select models to estimate the rate of discharges, the total quantity discharged and the state of the discharge. In addition, this course takes consequence into the real world with the introduction of realistic and worst-case releases and conservative analysis.
Unit 1:
- Define the terms “source model” and “consequence”
- Describe the role of source models in consequence analysis
-Determine whether a release will be in liquid, gas, vapor, or two-phase form and the mechanism for the release
Unit 2:
- Estimate liquid release rates (discharge rates) using discharge coefficients
-Estimate liquid evaporation rates for liquid releases
Unit 3:
- Estimate gas release rates using source models that use a discharge coefficient
Unit 4:
- Identify issues for two-phase flow releases – flashing liquids
- Determine the mass flow rate of flashing liquids
- Identify two-phase releases during runaway reaction reliefs
This intermediate course is for upper-level (junior or senior) chemical engineering undergraduates who have had some exposure to process safety.
The concepts covered here are at a basic level, but it is suggested that the student have some familiarity with fluid flow (including Bernoulli’s equation) before taking the course, or that the course be taken concurrently with normal engineering courses on fluid flow. The course is intended to be taken in combination with other related SACHE courses, such as dispersion modeling. In particular, this course is recommended before taking ELA967 “Atmospheric Dispersion.”
Unit 1 – Introduction to Source Models
- Define the terms "source model" and "consequence"
- Describe the role of source models in consequence analysis
- Determine whether a release will be in liquid, gas, vapor, or two-phase form and the mechanism for the release
Unit 2 – Liquid Release and Liquid Pool Evaporation
- Estimate liquid release rates (discharge rates) using discharge coefficients
- Estimate liquid evaporation rates for liquid releases
Unit 3 – Gas Release
- Estimate gas release rates using source models that use a discharge coefficient
Unit 4 – Two-phase Aerosol Flow
- Identify issues for two-phase flow releases - flashing liquids
- Determine the mass flow rate of flashing liquids
- Identify two-phase releases during runaway reaction reliefs
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