This document contains tables of thermodynamic property data for refrigerants R134a, R717, and R22. The tables list values for enthalpy, pressure, entropy, temperature, and specific volume over a range of conditions. The data was collected by researchers at the Technical University of Denmark's Department of Energy Engineering for use in refrigeration system modeling and analysis.

2. Enthalpy [kJ/kg]
140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 500 520 540 560
Pressure[Bar]
0.50
0.60
0.70
0.80
0.90
1.001.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
20.00
30.00
40.00
50.00
s=1.65
s=1.70
s=1.75
s=1.80
s=1.85
s=1.90
s=1.95s=2.00s=2.05
s=2.10s=2.15
s=2.20
s=2.25
-40
-40
-30
-20
-20
-10
0
0
10
20
20
30
40
40
50
60
60
70
80
80
90
100
100
120 140
0.0020
0.003
0.004 0.005 0.006
0.007
0.008
0.009
0.010
0.015
0.020
0.030
0.040
0.050
0.060
0.070
0.080
0.090
0.100
0.150
0.200
0.300
0.400
0.500
0.600
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1.00 1.20 1.40 1.60
v= 0.200v= 0.150
v= 0.100
v= 0.080
v= 0.060
v=0.040
v=0.030
v=0.020
v=0.015
v=0.010
v=0.008
v=0.006
v=0.004v=0.003
DTU, Department of Energy Engineering
Energy Systems, Refrigeration
s in [kJ/(kg K)]. v in [m^3/kg]. T in [ºC]
M.J. Skovrup & H.J.H Knudsen. 08-08-19
R134a Ref :D.P.Wilson & R.S.Basu, ASHRAE TRANSACTIONS 1988, Vol. 94 part 2.
x =
s =

3. Enthalpy [kJ/kg]
200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
Pressure[Bar]
0.50
0.60
0.70
0.80
0.90
1.001.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
100.00
200.00
s=4.50
s=4.75
s=5.00
s=5.25
s=5.50
s=5.75
s=6.00
s=6.25
s=6.50
s=6.75
s=7.00
s=7.25
s=7.50s=7.75s=8.00s=8.25
s= 8.50
s= 8.75
-40
-40
-30
-20
-20
-10
0
0
10
20
20
30
40
40
50
60
60
70
80
80
90
100
100
110
120
120
130
140 160 180
0.003
0.004
0.005
0.006
0.007
0.008 0.009 0.010
0.015
0.020
0.030
0.040
0.050
0.060
0.070
0.080
0.090
0.100
0.150
0.200
0.300
0.400
0.500
0.600
0.700
0.800
0.900
1.000
1.500
2.000
3.000
4.000
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
100
110
120
130
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
2.00 3.00 4.00 5.00 6.00 7.00
v= 1.000
v= 0.800
v= 0.600
v= 0.400
v= 0.300
v= 0.200
v= 0.150
v= 0.100
v= 0.080
v= 0.060
v= 0.040
v= 0.030
v= 0.020
v= 0.015
v=0.010v=0.008
v=0.006
DTU, Department of Energy Engineering
Energy Systems, Refrigeration
s in [kJ/(kg K)]. v in [m^3/kg]. T in [ºC]
M.J. Skovrup & H.J.H Knudsen. 08-08-19
R717 Ref :R.Döring. Klima+Kälte ingenieur Ki-Extra 5, 1978
x =
s =

4. Enthalpy [kJ/kg]
940 960 980 1000 1020 1040 1060 1080 1100 1120 1140 1160 1180 1200 1220 1240 1260 1280 1300 1320 1340 1360
Pressure[Bar]
0.50
0.60
0.70
0.80
0.90
1.001.00
2.00
3.00
4.00
5.00
6.00
7.00
8.00
9.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
s=1.50
s=1.55
s=1.60
s=1.65
s=1.70s=1.75s=1.80s=1.85
s=1.90s=1.95s=2.00s=2.05s=2.10s=2.15s=2.20s=2.25
s=2.30s=2.35
-50
-40
-40
-30
-20
-20
-10
0
0
10
20
20
30
40
40
50
60
60
70
80
80
90
100 120 140 160 180
0.0015
0.0020
0.003
0.004 0.005
0.006
0.007
0.008
0.009
0.010
0.015
0.020
0.030
0.040
0.050
0.060
0.070
0.080
0.090
0.100
0.150
0.200
0.300
0.400
0.500
0.600
0.700
0.800
0.900
-50
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
1.00 1.20 1.40 1.60 1.80
v= 0.300
v= 0.200
v= 0.150
v= 0.100
v= 0.080
v= 0.060
v= 0.040
v= 0.030
v=0.020
v=0.015
v=0.010
v=0.008
v=0.006
v=0.004v=0.003
DTU, Department of Energy Engineering
Energy Systems, Refrigeration
s in [kJ/(kg K)]. v in [m^3/kg]. T in [ºC]
M.J. Skovrup & H.J.H Knudsen. 08-08-19
R22 Ref :R.C.Downing. ASHRAE Transactions 1974. Paper No.2313.
x =
s =