Ingenieria

F1. Overview of AFT Fathom

Components That Can Be Modeled
Branching section (up to 25 pipes)
Known pressure or flow boundaries
Pumps
Pump curves follow a polynomial equation or can be linearly interpolated
Centrifugal pumps and positive displacement pumps

Pressure and flow control valves
Relief valves and check valves
Spray discharge nozzles
Heat exchangers
Hydraulic losses
Heattransfer

General fittings and components where the resistance curve follows a
polynomial relationship
Also can be modeled as linearly interpolated data

Piping insulation
F1-2

Engineering Limitations
No practical software limit to model size
Flow is steady-state, incompressible and one-dimensional
No limit on number of fittings (i.e., Fittings & Losses)
No limit on number of pumps,control valves, etc.
No limit on number of custom components, fluids or pipe materials

F1-3

System Requirements
Microsoft Windows 95, 98, ME, NT, 2000, XP, Vista
64 MB RAM
35 MB hard disk space
Mouse
600 x 800 SVGA display or higher
Windows PC network compatible

F1-4

Primary Windows
The AFT Fathom modeling process flows through five Primary Windows
Workspace
Model DataOutput
Visual Report
Graph Results

The Primary Windows are subordinate to the main AFT Fathom window
The Primary Windows offer a mixture and graphical and text-based
features to assist in the modeling process

F1-5

Primary Window Process Flow

Model Data
Visual Report
Workspace

Output
Graph Results

F1-6

The Five Primary Windows
Workspace window
Where you build the modelvisually and see the model layout

Model Data window
A text-based complement to the Workspace window
Shows input data in text form

Output window
Displays the results of the analysis in text form
Lets you produce attractive, effectively organized printed output reports

Visual Report window
Merges the output data with the pipe system layout from the Workspace
Allows customized layoutof the information for documentation and presentation
purposes

Graph Results window
A full-featured, customizable Windows plotting capability
Results can be viewed in a variety of ways for evaluating system performance or
identifying important trends
F7-1

Workspace: Toolbox
This tool is useful for grouping pipes
and junctions

This tool will
zoom in on a
selected area
Theseicons
represent
different
components

This tool is used to
draw new pipes
This tool will add
annotation to the
workspace

F1-7

Creating Objects
Pipe and junction objects are created using the Workspace Toolbox
New pipes and junctions can also be derived from previous ones by duplication

Pipes are drawn on the Workspace
Junctions are dragged from the Toolbox
Pipe and junctionshave default numbers assigned
Users can reassign numbers
Pipes numbers are displayed near the pipe center preceded by a "P"
Junction numbers are displayed over the junction icons preceded by a "J"
Pipes also have a direction arrow displayed with the number to indicate the positive
flow direction

F3-3

Workspace - Editing Features
Cut, copy, paste, delete, duplicate and undo featuressupported
Workspace can be sized to fit the model
You can zoom out to see a larger area
Objects can be selected as a group in several ways
Using the Selection Tool on the Toolbox - also in conjunction with [shift] or [alt] keys
Using the SHIFT key while clicking on the objects
Using Select Flow Path on the Edit menu
Using the Select Special tool on the Edit menu
Using Groups / Select on theEdit menu
Using the Select All feature

The Reference Flow Direction of a pipe can be changed
The selected objects can be renumbered
The Find tool will move the Workspace window to show a pipe or
junction

F1-8

Workspace - Platform for Data Entry
All pipe and junction objects placed onto the Workspace are interactive
To open the Specifications window for data entry, just double-click...