1. Terry A. Ring Chemical Engineering University of Utah
AIChE Project Week 1
Terry A. Ring
Chemical Engineering
University of Utah

2. Consequences Analysis
Excel Sheets
Release Rate
Gas Flammability Test
Consequence Input
Down Wind Concentrations
Bursting Vessel
Fireball Damage
Explosion Blast Damage
Internal Calculation Pages
Input Cells
Output Cells

3. Consequences Analysis
Gas/Liquid
Chemistry – Composition
Flammability
Lower Explosion Limit (LEL)
O2 requirement for combustion
P&T & Chemistry
Vapor Pressure
Viscosity
Release Rate
Hole size
Pipe size
Consequence Input – Choose Distances
Release Rate
At elevation
Into wind
Downwind concentration
Exphixiant
Poison
Vessel Burst
Energy Release
Damage to surroundings
Projectiles
Fireball
Thermal Radiation Damage
Vapor Cloud Explosion
Explosion Damage

4. ERPG-Levels The three ERPG tiers are defined as follows:
Odor Detectible
The three ERPG tiers are defined as follows:
ERPG-3 is the maximum airborne concentration below which nearly all individuals could be exposed for up to 1 hour without experiencing or developing life-threatening health effects.
ERPG-2 is the maximum airborne concentration below which nearly all individuals could be exposed for up to 1 hour without experiencing or developing irreversible or other serious health effects or symptoms which could impair an individual's ability to take protective action.
ERPG-1 is the maximum airborne concentration below which nearly all individuals could be exposed for up to 1 hour without experiencing more than mild, transient adverse health effects or without perceiving a clearly defined objectionable odor.
10-49% of LEL

5. Questions Answered Last Week
How to determine Tie lines for Triangular Diagram.
Aspen
Choose Correct Thermo Package
Exercise 02 Powerpoint
Choose components
You will vary the composition for different Tie lines
Set up a 3 phase flash
With a small amount of vapor produced
Light Liquid Comp
One end of tie line
Heavy Liquid Comp
Other end of tie line

6. Questions Answered Last Week
Since the problem statement gives Hysis screen shots, should we use Hysis for the simulation?
You can use any simulator for this problem.
For Kinetics in Aspen
Aspen Units
For Kinetics in ProMax
Chose correct units from pull down menu.

7. Questions?