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Original Released by Magnus Holmgren for Matlab and Excel:http://xsteam.sourceforge.net and/orhttp://www.x-eng.com

Atthis github repository you can find the/a matlab version.

A .NET implementation is availible thanks to the work of rogerlew here:XSteamNET.

XSteam provides (mostly) accurate steam and water properties from 0 -1000 bar and from 0 - 2000 °C according to theIAPWS release IF-97. Foraccuracy of the functions in different regions see IF-97 Page 4

Also includes thermal conductivity and viscosity, which are not part ofthe IF97 release.

• Thermal Conductivity: (IAPWS 1998)http://www.iapws.org/relguide/ThCond.pdf
• Viscosity: (2003)

Some effort has been made to include the refined function of more recent releasesand also functions for calculations on heavy water. This includes:

• IAPWS R4
• IAPWS R14

In chronological order:

• IAPWS
• Magnus Holmgren
• drunsinn
• mohit0749
• gonmolina
• xjtu-blacksmith

There are no requirements for installing pyXSteam with Python 3.6 and up.

Tests require numpy, demos require numpy and matplotlib

runpython3 setup.py install

To run unittests you need two additional packages:pytest andnumpy. After installing both, just run pytest inthe base directory. The tests use some fixed values from the documentation to make sure that every coefficientand formula works as intended.

To test if setup was successful, runpython3 bin/pyXSteamDemo.py. This will require numpy and matplotlib to be installed.

All Functions follow the same naming schema: First the wanted property,then a underscore_, then the wanted input properties Example:t_ph is temperature as a function of pressure and enthalpy. For a listof valid functions se below:

Simple Example:

from pyXSteam.XSteam import XSteamsteamTable = XSteam(XSteam.UNIT_SYSTEM_MKS)print(steamTable.hL_p(220.0))

By using the unitSystem Parameter, you can tell XSteam witch Unit System you are using.

steamTable = XSteam(XSteam.UNIT_SYSTEM_MKS) # m/kg/sec/°C/bar/WsteamTable = XSteam(XSteam.UNIT_SYSTEM_FLS) # ft/lb/sec/°F/psi/btusteamTable = XSteam(XSteam.UNIT_SYSTEM_BARE) # m/kg/sec/K/MPa/W

To enable logging, add the following lines to your code:

import logginglogging.basicConfig(level=logging.INFO)

or alternatively

import logginglogger = logging.getLogger('pyXSteam')logger.setLevel(logging.DEBUG)sh = logging.StreamHandler()sh.setFormatter(logging.Formatter('%(name)s - %(levelname)s - %(message)s'))logger.addHandler(sh)

• pull requests are always wellcome!
• code style is enforced by black