# Examples¶

This page serves as a teaser of the functionality of CoolProp. These examples are written in the Python programming language. For more information see:

## Sample Props Code¶

To use the PropsSI function, import it and do some calls, do something like this

# Import the things you need
In [1]: from CoolProp.CoolProp import PropsSI

# Print some information on the currently used version of coolprop
In [2]: import CoolProp; print(CoolProp.__version__, CoolProp.__gitrevision__)
(u'6.1.0', u'7864c2614ce5a0ef972386ee7f39859f0d3f8038')

# Density of carbon dioxide at 100 bar and 25C
In [3]: PropsSI('D', 'T', 298.15, 'P', 100e5, 'CO2')
Out[3]: 817.6273812375758

# Saturated vapor enthalpy [J/kg] of R134a at 25C
In [4]: PropsSI('H', 'T', 298.15, 'Q', 1, 'R134a')
Out[4]: 412333.95323186804


All the possible input and output parameters are listed in the High-Level API documentation

To understand more about what is going on under the hood, go to Pure and Pseudo-Pure fluid properties documentation.

## Sample HAPropsSI Code¶

To use the HAPropsSI function, import it and do some calls, do something like this

# import the things you need
In [5]: from CoolProp.HumidAirProp import HAPropsSI

# Enthalpy (J per kg dry air) as a function of temperature, pressure,
#    and relative humidity at STP
In [6]: h = HAPropsSI('H','T',298.15,'P',101325,'R',0.5); print h
50423.4503908

# Temperature of saturated air at the previous enthalpy
In [7]: T = HAPropsSI('T','P',101325,'H',h,'R',1.0); print T
290.962089195

# Temperature of saturated air - order of inputs doesn't matter
In [8]: T = HAPropsSI('T','H',h,'R',1.0,'P',101325); print T
290.962089195


Or go to the Humid Air Properties documentation.