AFT xStream 3
Significant New Features
steam and gas systems efficient so you can determine the best mitigation methods.
Workspace Layers
Customize and view model appearance, input data, and results - all in one place. Workspace Layers surpass the capabilities of the previous Visual Report feature.
Reciprocating Compressor
Model single or double-acting multi-cylinder reciprocating compressors, accounting fully for all fundamental thermodynamics.
Transient Checkpoints
Extend the length of an existing transient run without the need to re-run the entire simulation, or stop and continue a run from other points in the simulation.
Retain Partial Transient Output
Improved Valve Window
Clarifies and expands the available valve loss models, and makes it easier to define a valve characteristic, which can be critical for an accurate model. Clearly distinguish data sources such as User Specified, Characteristic, or Handbook, to understand the available options.
Streamlined Design Alerts
Other features to look forward to
Custom Junction Icons
Isometric Freeform Drawing
New Annotations
Set Workspace Print Area
A new non-Newtonian viscosity model has been added to model power law fluids that have an apparent yield stress. (Fathom 12 and Impulse 9 only)
Customize Graph From Workspace Options
PFA Module Improvements
Workspace Layers:
How to use them
A group of layers is like a stack of transparencies. Each layer displays specific, customizable information and together they combine to form the Workspace view for your model. This is concept is much like Adobe Photoshop. Layers determine the visibility of the objects in the Workspace, but all objects exist regardless of visibility for connectivity and calculation purposes. Creating, customizing, and toggling Workspace Layers gives you more control over viewing your data than ever before.
Modeling Additions and Improvements
- Zero-Length Connector Improvements - Zero-Length Connectors now behave like standard pipes for most features, including selection and graphing tools.
- Distinguish User and AFT Fluids - New category for user-defined fluids, making it easier to find custom entries.
- Simpler Force Definitions - Difference forces spanning more than 2 pipes no longer require the definition of a group.
- Control Valve Fully Open Cannot Regain Control - New special condition that keeps the control valve in a locked-open position during transients.
- API 618 Limitations in PFA Module - API 618 outlines frequency-dependent pulsation limits - you can now check for violations graphically, and see locations where the limit is exceeded.
New/Improved Output Parameters and Messages
- Compressor RPM Output Parameter - Report compressor speed in RPM, in addition to percent.
- Dimensionless Heat Transfer Output Parameters - Grashof, Nusselt, Prandtl, and Rayleigh Numbers have been added as Output parameters.
- Valve xT Output Parameter - Report and graph the xT value used for valves.
- Estimated xT Output Parameter - Provide estimated xT value as used in the solver for valve loss models that do not use the Cv/xT loss model.
- Profile Graphs for Temperature Saturation and Temperature Superheat - Graph saturation temperature and temperature above saturation (superheat) along flow paths.
- Laminar Caution - Alerts the user if flow at junctions is in a laminar range.
- POR/AOR in Compressor Summary - Show the values for Preferred and Allowed Operating Ranges in the Compressor Summary.
- Events Messages in New Format - Events are now shown in a cleaner, collapsible format similar to Warnings.
Improved Importing of PCF, EPANET, GIS, and CAESAR II models
- Import Bend r/D - Import PCF bends with appropriate r/D
- Import Speed Increase - Importing is up to 10x faster in some cases
- Better Defaults and Display for Imports - Better defaults and display options for imported models.
- Improved Import of Pipe Materials - Improved ability to link AFT pipe materials to imported pipes.
- Display CAESAR II Node Names - Display imported CAESAR II node names as junction names.
Behind the Scenes Improvements
- Graphing Optimizations - Significant improvements to backend graphing code, to provide additional stability now and more capabilities in the future.
- eLicense Access Improvements - Added heartbeat functionality to eLicense, which improves security and the release of license seats not in use.
- Output Improvements - Significant improvements to backend output code, to provide additional stability now and more capabilities in the future.
- Timed Recovery File - Automatically generate a backup of your model that can be used to recover unsaved work in the event of unexpected application closure.
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