Water and vapor properties#

The «Water and water vapor properties» block calculates water and watervapor parameters and water vapor parameters according to IAPWS-97 standard.

Library for calculating the properties of water and water vapor - GitHub ( MIT License ).

The value -1 on the output indicates the impossibility of calculating the parameterat the selected initial data.

1. Units of measurement#

Property	Unit
Pressure	MPa
Temperature	ᵒС
Density	\(\frac{kg}{m^3}\)
Specific volume	\(\frac{m^3}{kg}\)
Specific enthalpy	\(\frac{kJ}{kg}\)
Specific entropy	\(\frac{kJ}{kg \cdot K}\)
Specific exergy	\(\frac{kJ}{kg}\)
Specific internal energy	\(\frac{kJ}{kg \cdot K}\)
Specific isobaric heat capacity	\(\frac{kJ}{kg \cdot K}\)
Specific isochoric heat capacity	\(\frac{kJ}{kg \cdot K}\)
Speed of sound	\(\frac{m}{s}\)
Isentropic exponent	-
Specific Helmholtz free energy	\(\frac{kJ}{kg}\)
Specific Gibbs free energy	\(\frac{kJ}{kg}\)
Compressibility factor	-
Steam quality	-
Region	-
Isobaric volume expansion coefficient	\(\frac{1}{K}\)
Isothermal compressibility	\(\frac{1}{MPa}\)
Isothermal throttling coefficient	\(\frac{kJ}{kg \cdot MPa}\)
Joule-Thomson coefficient	\(\frac{1}{MPa}\)
Dynamic viscosity	\(Pa \cdot s\)
Kinematic viscosity	\(\frac{m^2}{s}\)
Thermal conductivity	\(\frac{W}{m \cdot K}\)
Thermal diffusivity	\(\frac{m^2}{s}\)
Prandtl number	-
Surface tension	\(\frac{N}{m}\)

Description of input parameters

p - pressure

t - temperature

h - specific enthalpy

s - specific entropy

v - specific volume

x - steam quality

Property	Default value	Description	Units of measurement
Input parameters	p-t	-	{p-t; p-h; p-s; p-v; p-x; t-x; t-h; t-s; t-v; h-s}

Parameters	Input/Output	Description	Units of measurement	Port type
Input 1	input	-	-	Thermohydraulic systems; Automatics
Output 2	input	-	-	Thermohydraulic systems; Automatics
Pressure	input	-	-	Thermohydraulic systems; Automatics

In order to see the connection capabilities of the block, you need to go to the Description of block ports page