TAILIEUCHUNG - Advanced Recycle Operations

This module will introduce you to several advanced topics concerning the operation and convergence of the Recycle unit operation. The HYSYS Recycle logical operation is used to solve looped systems where downstream material is mixed back in upstream in the process. The Recycle is a logical operation; it does not transform the stream that passes through it. The Recycle operation can be used several times in a given simulation. Every time a recycle operation is added, the total time needed for the simulation to successfully calculate and converge increases. The information presented in this module can be used to reduce. | Advanced Recycle Operations 1 2004 AspenTech - All Rights Reserved. 06 Advanced Recycle Operations Advanced Recycle Operations 1 2 Advanced Recycle Operations Introduction This module will introduce you to several advanced topics concerning the operation and convergence of the Recycle unit operation. The HYSYS Recycle logical operation is used to solve looped systems where downstream material is mixed back in upstream in the process. The Recycle is a logical operation it does not transform the stream that passes through it. The Recycle operation can be used several times in a given simulation. Every time a recycle operation is added the total time needed for the simulation to successfully calculate and converge increases. The information presented in this module can be used to reduce this time and achieve greater success with the Recycle unit operation. Workshop The export gas compression section of the Turbo Expander plant is to be modified to deal with an additional hydrocarbon stream from elsewhere in the process. To cope with this additional load it has been decided to replace the existing single export gas compressor with a two-stage compression system. Each compressor is to be equipped with an after cooler and knock out drum. Liquids from each separator are to be recycled back to the previous stage. 2 Advanced Recycle Operations 3 Learning Objectives In this module you will learn how to Build simulations using Recycles. Position Recycle operations for optimum performance. Use the various numerical parameters to help reduce convergence time. Consider interactions between Adjusts and Recycles and how to control them with Calc Levels. Use Simultaneous mode when the flowsheet contains multiple interacting Adjusts. Prerequisites Before beginning this module you should have a reasonable understanding of the HYSYS program and be able to add streams and operations including the Set and Spreadsheet operations. Structure of this Module This module is split

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