AFT xStream

AFT xStream is a powerful fluid dynamic simulation tool for high-speed, acoustic transients that occur in steam and gas piping systems. Uncertainty in design and operations costs money and time. Now you can accurately simulate how your steam and gas systems will respond to potentially harmful transient events.

Capabilities

Accurately simulate high-speed transients in steam and gas piping systems including choked flow conditions
Evaluate overall system response and transient pipe forces after steam and gas turbine trips
Predict transient supply pressures, temperatures and flows to operating gas compressors and turbines when one trips offline
Simulate tank blowdowns and charging, and how long it takes to reach desired pressures
Predict transient pressures and flows due to heat exchanger tube ruptures
Easily change system input data including transient valve positions, compressor operation, control set points, pressures, temperatures and more
Initiate transients based on time or events in the system

Benefits

Reduce expensive overdesign resulting from analytical uncertainty
Increase uptime by understanding how an unexpected transient event will impact pressure, temperature and flow delivery to critical equipment
Improve safety by evaluating all system shut down scenarios
Validate that required flow can be delivered with certainty
Visualize the dynamic response

Applications

Features

2D flow diagram or isometric view interface
Built-in steady-state solver to automatically initialize system before the transient
Automatic pipe sectioning based on steady-state acoustic velocities
Compound transient event logic to model complex control sequences
Scenario Manager to track all design variants and operational possibilities in a single model file
Integrated graphing and reporting
Animation tools for visual interpretation of complex transient interactions
Generates force imbalance files that can be automatically read into CAESAR II®, ROHR2, AutoPIPE and TRIFLEX® pipe stress dynamic models
Built-in libraries of fluids (including NIST REFPROP and ASME Steam Tables) and fittings which can be extended and customized
Define component mixtures using the built-in NIST REFPROP and ChempakTM add-on thermophysical databases, totaling over 600 unique fluids

Data Integration

Import piping layouts and dimensional data from GIS Shapefiles, CAESAR II® Neutral Files, and PCF files from a wide range of sources
Robust Excel integration to import and export data

Helps identify and avoid resonant frequencies in systems, especially in those caused by reciprocating compressors.