- Paul Brown (of Ramgen Power Systems) aided in the MATLAB link. Chris Muzny (of NIST) aided with the link to C, and with the MATLAB link. Previous versions of the REFPROP database were developed by Graham Morrison and John Gallagher. Jim Ely, Dan Friend, and Marcia Huber wrote the early versions of the related databases NIST12.
- Artificial Intelligence 114 (1999) 297–347 CyclePad: An articulate virtual laboratory for engineering thermodynamics Kenneth D. Forbus a,∗, Peter B. Whalley b, John O. Everett c, Leo Ureel d, Mike Brokowski e, Julie Baher f, Sven E. Kuehne a a Qualitative Reasoning Group and Computer Science Department, Northwestern University b Department of Engineering Sciences, University of.
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Appendix A — Thermodynamic Property Tables A-4 Ammonia Data Book May 2008 Table A-1 Saturation Properties of Ammonia — IP Units (continued) Temperature Pressure Enthalpy (Btu/lb) Entropy (Btu/lb-R) Liq. Density Vapor Sp. Abstract The effect of pressure and temperature on the properties of water is a critical concept within engineering curriculum. Instructors spend considerable effort training students to use reference databases; traditionally in tabulated forms or more recently with use of computer-aided references. Computer-Aided Thermodynamic Tables 3 - CATT-3-x86-x64.rar.
Introduction
freesteam is an open source implementation ofinternational-standard IAPWS-IF97 steamtables from the International Association for the Properties of WaterandSteam (IAPWS). freesteam lets you compute water and steam properties for a wide range of pressures and temperatures: you can specify the state of the steam in terms of a variety of combinations of 'known' properties, then freesteam will solve and allow you to query to find the values of the 'unknown' properties.
The library includes bindings for the Python language, as well as bindings to allow it to be used from the ASCEND modelling environment. For Windows and Mac and Ubuntu users, convenient binary packages are provided.
New: Freesteam 2.0 released! This is a complete rewrite of freesteam in the C language, for faster, smaller binaries and better compatibility for accessing the DLL/SO from different C++ compilers.
There is a mailing list for freesteam users, which is the preferred support mechansim (it ensures that FAQs are captured for others to re-use). Alternatively, you can email the developer directly on [email protected](spam protection). The project is currently under active development (as of Jan 2010), and contributions are most welcome!
1. What can I do with it?
Using freesteam, you can set the state of steam using various pairs of knowproperties. The following input pairs are implemented:- (p,T)
- (p,h)
- (p,s)
- (p,v)
- (T,s)
- (T,x)
S = steam_ph(p,h). The routines return a 'SteamState' object that can then be queried for any output properties you wish to know, including Computer Aided Thermodynamic Tables Free Download Mac Download
| p | Pressure |
| T | Temperature |
| h | Enthalpy |
| s | Entropy |
| cp | Isobaric heat capacity |
| cv | Isochoric heat capacity |
| v | Specific volume |
| rho | Density |
| u | Internal energy |
| x | Quality (when saturated) |
| k | Thermal conductivity |
| mu | Dynamic viscosity |
| w | Speed of sound |
The above properties are accessed using functions in C, like double p = freesteam_p(S), and using properties in Python, like p = S.p.
Calculation of surface tension is not currently implemented in version 2.0
Avast 2030 serial key new. Saturation curves and the boundary curves used internally by IAPWS-IF97 canalso be accessed, if required.
7-1Cleaning and Disinfecting. Biliblanket light meter ii user manual. 6-1Chapter 7 Routine Cleaning and Maintenance. 7-1Maintenance Schedule.
Freesteam is now able (version 2.x)to auto-generate a complete set of steam tables suitable for student use, as well as a range of property diagrams, using Python code. Some property diagrams produced using freesteam-0.8.1 are also available.
Please check out the example code
2. License
freesteam is released underthe GNU GPL, which is available onlineathttp://www.gnu.org/copyleft/gpl.html.It is also distributed with the source code distribution for freesteam,as LICENSE.txt.
Note that under the GPL, you cannot sell or otherwise distribute any code that dynamically or statically links to the freesteam library unless your code is also licensed under the GPL.
3. Bugs
For a complete up-to-date list of bugs and feature requests, visitthe Mantis bug tracker forthe project. We are not using the SourceForge 'tracker' at this stage.
Some of the bugs current at the time of writing:
- Mac binary installer does not include the sample Python scripts
- There are still some small errors in the (p,h) calculation, of the order of 0.1%.
- Our documentation needs to clearly indicate which IAPWS releases are used to provide different functionality.
4. Future directions
Computer Aided Thermodynamic Tables
Some of the things waiting 'on the drawing board' are as follows. If you can help, please let me know!
High priority
- Updated documentation!
- Some more example code.
DIY Ideas 4U
- We would like to expose freesteam functionality to Excel via the XLW wrapper classes.
- Backwards correlations should be iteratively refined by a subsequent Newton solver stage, to reduce errors associated with their use.
- An add-in for OpenOffice would be good. Have received some partially-working source code for this from Allan Curtis
- Region 5 has not yet been implemented at all, but it's a low priority. Let us know if you'd need it.
- Develop a cross-platform GUI version using GTK+ or similar.
5. Related sites
- IAPWS-IF97 steam tables
- http://www.iapws.org/
http://www.iapws.org/relguide/visc.pdf
http://www.iapws.org/relguide/thcond.pdf
http://www.iapws.org/relguide/IF97.pdf
http://www.iapws.org/relguide/supsat.pdf
IAPWS paper fromJournal of Engineering for Gas Turbines and Power - Bernhard Spang's summary of IF97
- http://www.cheresources.com/iapwsif97.shtml
- IAPWS-95 scientific formulation
- http://www.iapws.org/relguide/IAPWS95.pdf
- Surface tension
- http://www.iapws.org/relguide/surf.pdf
- CppUnit
- http://cppunit.sourceforge.net/cgi-bin/moin.cgi
- http://sourceforge.net/projects/cppunit
- Rettig's units-of-measurement stuff
- http://www.embedded.com/shared/printableArticle.jhtml?articleID=9900094
- http://www.embedded.com/code/2001code.htm
- Brent solver
- http://www.library.cornell.edu/nr/bookcpdf.html
- Free (in the OS sense) IAPWS calculators
- jSteam (a Java implementation, based on freesteam, GPL licensed)
- IF97 (a Java implementation, LGPL licensed)
- X Steam (for Excel, OpenOffice and Matlab, licensing unclear)
Bernhard Spang's IF-97 Excel plug-in http://www.cheresources.com/iapwsif97.shtml(Visual Basic) - Leon Kos, University of Ljubljana: http://www.lecad.uni-lj.si/~leon/research/iapws-if97/IAPWS97.html(Javascript)
- Commercial IAPWS calculators
- ChemicaLogic, USA: SteamTab SDK
- University of Applied Sciences Zittau/Görlitz, Germany: FluidEXL
- Edward Throm: ASTEM97
- G&P Engineering: StmProps
- Zittau/Goerlitz University of Applied Sciences: LibIF97
- Wagner, Wolfgang, Kretzschmar, Hans-Joachim, International Steam Tables - TheIndustrial Standard IAPWS-IF97 for the Thermodynamic Properties andSupplemetary Equations for Other Properties: Tables, Algorithms,Diagrams, Software, 2nd ed., 2006 (!),Springer, Germany.
- MegaWatSoft: Steam97
- ARC Engineering plc: arcSteam
- GP International: GPSteam ('ASME97' formulation)
- TechWare Engineering: WinSteam
- WaterSteamPro
- Rudjer Boskovic Institute: ISANOIapwsif97
- Other steam calculators (Non IF97)
- WinSim STEAM67(ASME 1967 Steam Tables, with source code in C)
PARVO95, PARVO67 http://fortraner.narod.ru/(Fortran) In Russian, not tested. - Taftan Thermo Utilities (IFC '67 correlation)
- Some useful steam table charts
- Copied from Reynolds' ThermodynamicProperties in SI, Stanford Univ, 1979:
h-s, p-h, T-s, v-u - Generally of interest about water and steam:
- http://www.lsbu.ac.uk/water/index.html