Version 4 Improvements|
New Solution Method and Performance Improvements
Solution Method allows for much quicker solutions of problems.
This is especially important for problems with a large number
of components and branches.
speed of water/steam solutions based on improved handling
of data files.
local area network performance, and shorter solution times
for LAN users.
Improved User Interface
Valves - Flow control valves which vary throttled position
automatically to maintain a user-specified flow rate.
regulators and back pressure regulators which vary throttled
position automatically to maintain a user-specified pressure
(at valve inlet or outlet)
of Materials Reports - provides a listing of all components
used in a network and the number of each size of each component
used. For pipe, the report includes the length of each size
of each type of pipe used. A listing of materials used can
also be printed for each branch in a network.
Modeling Options - commonly accepted practice is that valves
and fittings use a turbulent friction factor to calculate
their flow resistance. An option to this approach is now provided
to use a friction factor consistent with a user specified
Reynolds number. This can be important for problems using
extremely viscous fluids or operating at exceptionally low
to Remove Tee Resistance - allows the user to remove the resistance
of a tee. In this case, the tee is simply a place where flow
divides/combines and does not have resistance. If desired,
custom tees with non-standard but known resistances can be
added as components in adjacent branches.
Fittings - option to automatically select the physical length
of reducers and enlargers based on the standard dimensions
for common metal fittings.
complete graphical interface allows the user to build a complete
network showing all flow paths. Displays pressures, flow rates,
fluid conditions, and others at all points within the piping
system. Symbolic picture of branch hardware is displayed showing
parameter values throughout each branch.
program and utilities are now 32 bit programs supporting long
- On-line Tutorial to provide guidance on program use.
Format - an alternative view of the network showing component
level detail of valves and fittings (both for screen display
and printouts), similar to a process and instrumentation diagram
Utilities - tightly integrated utilities allow the user to
readily view, create, or modify data files directly from DFS
menus or screens. In addition, any creation of new data files
will result in automatic update of DFS menus and pick lists
making new data immediately accessible by all users.
block operations - the user can Cut, Copy and Paste network
sections, Merge networks, and reverse actions using the Undo
HOME position and display scale (saved with the specific network
- Automatic backup of a working file at a user defined interval.
list of recent files used under the File menu option.
resize the network display to the largest size that will fit
on the screen.
find a specific branch or tee by its number.
ten colors in addition to black in the text feature for notating
the screen for important technical information and presentations.
images to the workspace in addition to simple text.
- Shortcut keys are now provided for many common functions such
as printing, opening files and saving files.
'My Settings' personal configurations allowing individual
users in LAN configuration to have unique default settings.
Calculation of Temperature Change for Adiabatic Flow Problems.
components with elevation and size changes more accurately
with fewer divisions.
assumption that compressibility is constant - calculates a
new compressibility factor for each component. Important for
problems where pressure and temperature are in a region where
Z changes rapidly.
to solve gas problems incompressibly - faster for low DP problems
without significant sacrifice of accuracy.