Ch E 310 - Fall 10 - Lecture 11

Ch E 310 - Fall 10 - Lecture 11 - Lecture 11 September 30,...

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Lecture 11 – September 30, 2010 Agenda: More on Sequential Modular Simulations In-class exercise 7
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Process Modeling of Large Systems Two approaches to solving large systems: Equation-based approach (e.g., A x = b) o Set up a system of equations/unknowns o Solve everything simultaneously Sequential Modular approach Equations for each unit are defined Calculations move unit-to-unit in sequence Recycle streams require trial-and-error
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Sequential Modular Simulation mixer stream 1 stream 2 stream 3 n 1 = 2 mol/s x 1A = 0.8 x 1B = 0.2 T 1 = 30 C 5 mol/s 0.50 mol A/mol 0.50 mol B/mol 46.6 C P mixer = 1 atm T mixer = T 3 Used module mixer.m to calculate the outlet conditions of the combined flow stream 3 given input array streams n 2 = 3 mol/s x 2A = 0.3 x 2B = 0.7 T 1 = 60 C Example: 2 inlets, 2 components >> out = mixer(streams) out = T: 46.6249 x: [0.5000 0.5000] Cp: [50.2000 34.1000] n: 5
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Sequential Modular Simulation mixer stream 1 stream 2 stream 3 n 1 = 2 mol/s x 1A = 0.8 x 1B = 0.2 T 1 = 30 C 5 mol/s 0.50 mol A/mol 0.50 mol B/mol 46.6 C P mixer = 1 atm T mixer = 46.6 C Add a flash drum as the second process unit in an overall chemical process system Need to construct a module function m-file flash.m to perform the necessary calculations to generate output conditions in streams 4 and 5 n 2 = 3 mol/s x 2A = 0.3 x 2B = 0.7 T 1 = 60 C flash P flash = 1 atm T flash = 90 C stream 4 stream 5 V L n 4 x 4A x 4B T 4 n 5 x 5A x 5B T 5 Q
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Sequential Modular Simulation feed stream n F x FA x FB T F How does a flash drum work for a binary mixture of A and B? Mixed liquid is fed at flow rate
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This note was uploaded on 09/21/2011 for the course CH E 310 taught by Professor Staff during the Spring '08 term at Iowa State.

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Ch E 310 - Fall 10 - Lecture 11 - Lecture 11 September 30,...

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