AFT Chempak
Fluid Properties
Bulk Modulus of Elasticity
Compressibility Factor
Critical Pressure
Critical Temperature
Density
Enthalpy
Entropy
Internal Energy
Isentropic Expansion Coef.,Gamma
Kinematic Viscosity
Molecular Weight
Phase
Prandtl Number
Pressure
Quality
Saturation Pressure
Saturation Temperature
Sonic Velocity
Specific Heat, cp
Specific Heat, cv
Specific Volume
Surface Tension
Temperature
Temperature Superheat/Subcooled
Thermal Conductivity
Viscosity
Volume Expansivity
Chempak Property Database
Chempak Viewer
Chempak Property Database
Comprehensive thermo-physical properties on a wide range of fluids for AFT’s family of pipe flow modeling software products
- For incompressible pipe flow analysis
- – data on ~700 fluids for AFT Fathom and AFT Impulse
- – assemble non-reacting static mixtures
- For compressible flow analysis
- – data on ~600 gases for AFT Arrow
- – model both static mixtures and dynamic mixing resulting from intersecting flow streams
- Fluids listed by up to 3 commonly used names
- Fluids listed by formula and chemical structure
- Sort on any of the identifiers
Chempak Viewer
The Chempak Viewer is included for free in all AFT software to access the Chempak Property Database.
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- Assemble non-reacting mixtures on a mass or mole basis
- Calculate fluid or mixture properties for any combination of the available input parameters as a single point, two point or a range of inputs
- Save or set your parameter and unit preferences as the default
- Save and reload input sets
- Save fluid and mixture sets for quick recall using the Recent Fluids list
- Specify a name for any fluid or mixture and it appears along with the standard Chempak name
- Change units ‘on the fly’ by double-clicking an output column header
Output
- Chempak Viewer provides both text and graphical output
- Configure which parameters are displayed, display order and units
- Supports English and SI units
- Export as a PDF file or to a spreadsheet for additional calculations
- Select a portion of the output and paste into a spreadsheet
- Customize your graphs using colors, axis scale, titles, markers and more
- Use your graphs in other documents
AFT Chempak
FAQs
Aren't the same fluid properties available within AFT software?
No. System modeling software, such as AFT Fathom and AFT Arrow, use and display in their output fluid properties needed for flow analysis, such as temperature, pressure, density, specific heat, etc. In total, about a third of the fluid properties Chempak calculates. All of the fluid properties Chempak calculates are available through the Viewer which is included in your software.
Examples of properties not available within the flow analysis software are; molecular weight, quality, isentropic expansion coefficient and others.
Must commonly used fluids and mixtures always be specified upon opening Chempak Viewer?
No, you may save lists ranging from one to any number of fluids or mixtures. These may be opened from the file menu and the Recent Fluids button facilitates quickly accessing recently used fluids and mixtures.
What sort of output is available from Chempak Viewer?
Chempak Viewer has an extensive and extensively configurable text output and graphical output. Text output can be for either a single point or for a range of inputs. What properties are shown, their units, order, etc. is all readily configurable through Output Control.
For ranges, Graph Properties will provide a graphical output for a wide range of properties.
Does Chempak have property data for hydrocarbon products?
In general, no. Chempak contains properties for fluids with a unique chemical composition. Most hydrocarbon fluids are described by a range of composition and/or properties.
For example, fluid meeting the specification for diesel oil #2 will not have a unique density, rather, it will fall into a range of densities.
If I buy a license for the Chempak database, can I use it with other AFT products?
Yes. The Chempak database can be shared and accessed among all AFT products.
Can I set up my own preferences for output content and engineering units in Chempak Viewer?
Yes. This can be done using Output Control and Unit Preferences in the Viewer.
Can I find out what phase the fluid is in the Viewer?
Yes. In the Viewer, the Phase is shown in the Output by default.
Can I see how a property varies with temperature or some other parameter with the Chempak Viewer?
Yes. In the Viewer you can specify that properties be obtained for a range. The results are displayed in the table. They can also be graphed.
AFT Software Add-On Modules
Settling Slurry (SSL)
Models the effects of pumping fluids containing settling solids using the Wilson/GIW method.
Add-on Module for:
Goal Seek & Control (GSC)
Significantly reduce your iterations. Identify input parameters that yield desired output values and simulate control functions.
Add-on Module for:
Extended Time SImulation (XTS)
Models dynamic system behavior and how critical system parameters vary over time.
Add-on Module for:
Automated Network Sizing (ANS)
Evaluates the complex interaction of system variables to reveal combinations of cost savings.
Add-on Module for:
Pulsation Frequency Analysis (PFA)
Helps identify pipe acoustical frequencies to avoid resonance from excitations.
Add-on Module for:
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