The application limits to continuous growth single stem plants, StemGL is a simple tool covering both calibration and simulation aspects of biomass production and allocation. Some GreenLab implementations and their specifications The following table summarises the implementations and their specifications They also differ in their specifications, allowing stochastic simulation or not,įitting or not, retroaction on structure or not. When she’s not Engineering, she can be found riding her bike, knitting and never far from a good cup of coffee or a well aged single malt.Various GreenLab implementations under different environments are available. She is also a member of APEGA, APEGBC and the AIChE. Laura is a Chemical Engineer from the University of Alberta and holds an M.Eng. At Process Ecology she specializes in Air Emissions Estimation, reporting and reductions as well as safety in Process Design. She joined Process Ecology in 2008 after working as a Research Scientist with Nova Chemicals.
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Between 20 Laura acted as Senior Support Staff for Hyprotech/Aspentech supporting a number of software products for process modeling, optimization and estimation. She then spent five years in engineering companies SNC Lavalin and then Fluor Daniel Canada. Laura began her career with Shell Canada providing engineering support at Scotford Refinery. Laura has a diverse experience in upstream and downstream oil & gas, chemical and polymer industries. Her key strengths are in process modeling and dynamic simulation, conceptual design, air emissions estimation and emissions reduction. Laura brings more than 27 years of experience in process engineering and chemical engineering research. Gas plant fractionation column simulations are generally robust and will operate well over a fairly wide range of inlet conditions.ĭo you have questions or comments regarding this article? Click here to contact us. Once each column is converged, switch the column specifications from flowrates over to matching product specifications as listed above. When creating a new simulation for a fractionation train, it is usually easier (and good modeling practice) to start with flow rate specifications for the columns. Reflux Ratio - 0.5 or 1.0 is a common value.RVP in bottoms - 12 psia would be a typical maximum value.C2 mole fraction in bottoms or C2/C3 mole ratio in bottoms, a C2/C3 mole ratio of 2% is common.
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However, when designing a new or modified fractionation train, the most useful specifications in a simulator will reflect the product properties more closely: By using these specifications in a simulation, the predicted product properties can be compared against measured samples and the simulation parameters adjusted to match current behaviour. In the actual operating plant, the column specifications are usually:įor simulation purposes, the above specifications are most useful when troubleshooting an existing fractionation train. Product properties that are of interest are the C2/C3 mole ratio in the LPG product and the Reid Vapour Pressure (RVP) in the stabilized condensate. The stabilizer takes inlet condensate and removes C4- material in order to meet a vapour pressure specification. The bottoms from the deethanizer are sent to the debutanizer where they are separated into a mixed LPG product (mostly C3s and C4s) and a stabilized condensate product (C5+ material). The deethanizer is designed to take liquid from the low temperature separator (LTS) and remove ethane and lighter components from the liquid. Good modeling specifications result in a robust model that can be used for design and troubleshooting applications. The 3 most common are the deethanizer, debutanizer and stabilizer as shown here (condensers and reboilers omitted for clarity).Ĭreating a gas plant simulation model requires assigning specifications to the columns, such that they converge and also accurately model the operation of the plant. Many gas plants have one or more columns to provide product fractionation and purification.