TPSI

TPSI implements the computer programs described in:

  1. Reynolds, W.C., Thermodynamic properties in S.I., Department of Mechanical Engineering - Stanford University, Stanford, CA, 1979.

A first version of the program was written by Prof. W.C. Reynolds and distributed as a DOS executable program. The program was later modified and expanded with more fluids and properties, as documented in:

  1.  Colonna, P., Rebay, S., and Silva, P., Computer Simulations of Dense Gas Flows Using Complex Equations of State for Pure Fluids and Mixtures and State of the Art Numerical Schemes. Tech. Rep., Università di Brescia, Via Branze, 38, 25123 Brescia, Italy, March 2002.

TPSI provides thermodynamic properties for the fluids listed in Table 1. The listed FluidProp names (either short or long) must be used to specify the fluid name in the SetFluid method. For a given fluid, the FluidProp name is the same in all thermodynamic libraries in which the fluid is available. Liquid metals are available at additional cost.

 

Table 1

FluidProp Name (short) FluidProp Name (long) MW [g/mol] Tc [°C] Pc [bar] vc [m3/kg] Tmin [°C] Tmax [°C]
air
air
28.9635
[-]
[-]
[-]
-223.15
1326.85
NH3
ammonia
17.0306
133.65
116.27
0.00399774
-73.15
400.00
C4H10
butane
58.1110
150.80
37.18
0.00489947
-73.15
350.00
Cs
cesium
132.9133
1774.64
117.30
0.01229748
526.85
2726.85
C2H6
ethane
30.0408
32.73
50.10
0.00463544
-123.15
306.85
C7H16
heptane
100.1808
264.53
26.20
0.00507582
26.85
406.85
C6H14
hexane
86.1572
232.98
29.27
0.00528089
-23.15
406.85
i-C4H10
isobutane
58.1110
135.92
36.85
0.00519999
-73.15
306.85
i-C5H12
isopentane
72.1346
187.83
34.09
0.00447662
-73.15
350.00
CH4
methane
16.0433
-82.59
45.99
0.00616747
-182.47
350.00
N2/O2/Ar/H2O
moist. air
22.2141
-9161.95
-0.09
[-]
-33.15
326.85
C8H18
octane
114.2044
294.36
24.00
0.00556639
26.85
406.85
C5H12
pentane
72.1346
193.85
32.40
0.00511297
-73.15
350.00
K
potassium
39.1010
1899.85
167.00
[-]
526.85
2726.85
C3H8
propane
44.0544
96.67
42.36
0.00496161
-73.15
350.00
R11
R11
137.3793
198.00
44.09
0.00185739
-73.15
350.00
R12
R12
120.9418
112.02
41.60
[-]
-73.15
350.00
Rb
rubidium
85.4817
1832.75
133.90
0.01609925
726.85
2726.85
Na
sodium
22.9915
2299.85
341.00
[-]
526.85
2726.85
H2O
water
18.0159
374.14
220.89
0.00323482
-0.15
800.00

(1) In this model air and H2O vapor are treated as perfect gas with variable specific heats. The liquid is treated as incompressible. It uses specific heat and saturation equations from the appropriate TPSI subroutines of the other fluids.