WOLFRAM|DEMONSTRATIONS PROJECT

Pressure-Enthalpy Diagram for Water

​
view lines of constant:
vapor quality
temperature
density
entropy
color
black & white
grid lines
critical
​
​
q = 0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.
T = 50 °C
100
150
200
250
300
350
400
450
500
550
ρ = 1000 kg/m
3
950
900
800
700
600
400
200
50
10
2
0.2
S = 0.5 kJ/kg K
1.
1.5
2.
2.5
3.
3.5
4.
4.5
5.
5.5
6.
6.5
7.
7.5
8.
8.5
0
500
1000
1500
2000
2500
3000
3500
0.1
1
10
100
1000
10
4
enthalpy (kJ/kg)
pressure (bar )

This Demonstration shows a pressure-enthalpy (
P
-
H
) diagram for water. Check and uncheck the boxes to add or remove a property from the diagram: you can plot the lines of constant vapor quality
q
(blue), temperature
T
(green), density
ρ
(orange, dashed), and entropy
S
(purple, dashed). Check the "critical" box to view the saturated liquid (light blue) and vapor (red) curves and the critical isotherm (pink). View the diagram in color or black and white using buttons, or remove the grid lines using a checkbox.