0.1
1
10
140
160
180
200
220
240
260
280
300
320
340
360
380
400
420
440
460
480
500
520
540
560
580
600
Enthalpy [kJ/kg]
Pr
e
s
s
u
re
[
M
Pa
]
Produced by E. Hansen and I. Aartun, NTNU 1999. Based on the program
Allprops, Center for Applied Thermodynamic Studies, University of Idaho.
T=90
T=80
T=70
T=60
T=50
T=40
T=30
T=20
T=10
T=0
T=-10
T=-20
T
=-3
0
T
=-4
0
T
=1
1
0
T
=1
2
0
T
=1
3
0
T
=1
4
0
T
=1
5
0
T
=1
6
0
T
=1
7
0
T
=1
8
0
T
=1
9
0
T
=2
0
0
S=0
.9
S=1
.0
S=1
.1
S=1
.2
S=1
.3
S=1
.4
S=1
.5
S=1
.6
S=1
.7
S=1
.8
S=1.9
S=2.0
S=2.1
S=2.2
R-134a
2
3
4
5
6
7
8
9
0.2
0.3
0.4
0.5
0.6
0.8
0.9
0.7
R-134a
Pressure-Enthalpy Diagram
S=Specific Entropy, kJ/kg*K