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Solution to the warning that appears in Aspen’s NQ curve simulation

2017-04-16View Original

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Convergence iterations: OL IL Err/Tol 1 10 722.64 2 6 61.428 3 7 8.6920 4 6 2.0219 5 6 0.52139 Iteration = 3 Feed Stage = 22 Objective Function = 2.6463 Feed tray optimization converged for NSTAGE = 61 Optimum feed stage = 23 Objective Function = 2.6441 * WARNING WHILE GENERATING RESULTS FOR UNIT OPERATIONS BLOCK: “T2001” (MODEL: “RADFRAC”) NQ CURVE “1” STOPPED AT STAGE “61” SINCE THERE IS NO SIGNIFICANT CHANGE IN OBJECTIVE FUNCTION WHEN INCREASING NUMBER OF STAGES. ** Converging the base case for NSTAGE = 65 **

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