Excel Engineering
Open source freeware engineering.

Google

Mission

To excel in engineering you need simple great tools. This is the homepage of Magnus and Stina and here we share some of our engineering tools distributed as freeware.

X Steam,  Steam and Water properties according to the IAPWS IF-97 standard.
X Calc,     Flowsheeting, Process calculation, Equipment calculations for MS Excel.
Other Tools,    For example project planning template and Dymola tools

We have just made a Web update to make room for more applications. Hope you apologize if there is broken links etc. for the moment.

X Steam 2.6!

Freeware IF97 properties for water and steam.

New! X Steam Application
and X Steam for LabVIEW

Steam and water properties based on the "International Association for Properties of Water and Steam Industrial Formulation 1997 (IAPWS IF-97). A full implementation of the IF-97 standard that provides very accurate steam and water properties in ranges from 0-1000 bar and 0-2000°C for use in process Engineering Industry . Provided thermodynamic properties are:

 - Temperature
 - Pressure
 - Enthalpy
 - Specific volume
 - Density
 - Specific entropy

  - Specific internal energy
 - Specific isobaric heat capacity
 - Specific isochoric heat capacity
 - Speed of sound
 - Viscosity
 - Vapour fraction

All properties can be calculated with the inputs, p and T known, p and h known, h and s known and some with pressure and density known. X Steam are a full implementation of the IF-97 formulation for industrial use including all regions and  backward functions for good calculation speed. The code are speed optimized with pressure and enthalpy as inputs for dynamic simulations.

The code are avalible in the following releases:
 - Matlab (XSteam Steam and water properties for Matlab)
 - Excel (XSteam Steam and water properties as MS Excel Script)
 - Ooo Calc (Open Office, Star Office) (XSteam Steam andwater properties as Ooo Script)
 - LabVIEW (XSteam Steam and Water properties for LabVIEW)
 - Application (XSteam standalone application by Ken Chan. .exe file.)
 - Free Basic (XSteam freebasic translation of source)
 - Dynamic Link Libary (.dll for use with for example Fortran, LabVIEW or VC++ etc.)

X Calc

Flowsheeting, Process calculations, Equipment calulations for MS Excel.

  • New! State diagrams (Mollier diagrams) for use in excel or pdf for printout.

  • Example flowsheeting for pulp mill.

  • Picture of layout.

Other tools.

  • Excel gnatt chart for project planning and follow up. (MS Project for MS Excel)

  • Dymola/Modelica optimizer / solver for Excel. (OLD!!)

  • Dymola/Modelica variable import for Excel. (OLD!!)

    Download from the download menu. More tools.

Open Source Code

The codes are open source. You are free to use, modify and distribute them as long as authorship is properly acknowledged. (Freeware)

Se the development tasks page for if you want to help in developing the codes and share it with others.

Link to this page

If you like this page and the freeware open source codes please link to www.x-eng.com from your homepage to help other people find the site. Do you have any tips on other free tools for heat and power engineering or great web resources please inform me! E-mail: magnus[Remove this]@x-eng.com

  

Last updated 2007-02-09