Dynamics Initialization

Introduction

This functionality can be accessed by clicking Flowsheet, Dynamic Initialization. It allows you to define groups of objects and then performs certain actions on those objects such as reinitializing them all with Nitrogen.

Regions

You can create a number of regions, with each one typically referring to a collection of related objects. There are two ways to define a region:

• Click Flowsheet, Dynamic Initialization. Enter the name of a new region. A view will open for that region. Go to the Object page and click "Edit Object List". This will allow you to easily add objects to the region.
• Select a groups of objects in a PFD, right mouse click, and choose Send to Dynamic Initialization. This allows you to add objects to an existing region or send them to a new region.

Settings

On the Fluid Packages tab, an initialization stream can be selected. One can be selected for each fluid package, and the stream conditions and composition can be viewed. With a stream selected, clicking Initialize will fill all objects in the region with the stream. This is an easy way to clear out the contents of a plant by filling it with nitrogen before doing a dry startup for example.

On the Configuration page, other actions can be selected.

These actions include:

• Resetting valves to their fail state.
• Turn pumps off.
• Turn of air cooler air flows.
• Reset compressors (reinitialize them).
• Initialize controllers to manual with an OP of 0.
• Reset digital operation that have no PV to an output state of False.
• Run a user variable macro. The a user variable with the name given is found in any of the objects, its associated code will be executed. This provides a mechanism to perform custom steps or changes.

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