NIST REFPROP

In the thermodynamic module also FLUIDCAL is used by CONVAL^®

This program, developed by the National Institute of Standards and Technology (NIST), calculates the thermodynamic and transport properties of industrially important fluids and their mixtures. REFPROP is a Program, not a Database Containing Measurements. The REFPROP "database" is actually a program and does not contain any experimental information, aside from the critical and triple points of the pure fluids. The program uses equations for the thermodynamic and transport properties to calculate the state points of the fluid or mixture. These equations are the most accurate equations available worldwide. Their high accuracy is obtained through many coefficients in the equations, and thus the calculation speed will be slower than other equations such as the Peng-Robinson cubic equations. The equations are generally valid over the entire vapor and liquid regions of the fluid, including supercritical states; the upper temperature limit is usually near the point of decomposition of the fluid, and the upper pressure (or density) limit is defined by the melting line of the substance.

REFPROP is based on the most accurate pure fluid and mixture models currently available. It implements three models for the thermodynamic properties of pure fluids: equations of state explicit in Helmholtz energy, the modified Benedict-Webb-Rubin equation of state, and an extended corresponding states (ECS) model. Mixture calculations employ a model that applies mixing rules to the Helmholtz energy of the mixture components; it uses a departure function to account for the departure from ideal mixing. Viscosity and thermal conductivity are modeled with either fluid-specific correlations, an ECS method, or in some cases the friction theory method.

Fluids and mixtures which are embedded in REFPROP database together with their range of validity:

Short name	CAS number	Full chemical name	EOC limits
acetone	67-64-1	propanone	178.5-550 K, 700 MPa
ammonia	7664-41-7	ammonia	195.495-700 K, 1000 MPa
argon	7440-37-1	argon	83.8058-2000 K, 1000 MPa
benzene	71-43-2	benzene	278.674-725 K, 500 MPa
butane	106-97-8	n-butane	134.895-575 K, 200 MPa
carbon dioxide	124-38-9	carbon dioxide	216.592-2000 K, 800 MPa
carbon monoxide	630-08-0	carbon monoxide	68.16-500 K, 100 MPa
carbonyl sulfide	463-58-1	carbon oxide sulfide	134.3-650 K, 50 MPa
cis-butene	590-18-1	cis-2-butene	134.3-525 K, 50 MPa
cyclohexane	110-82-7	cyclohexane	279.47-700 K, 250 MPa
cyclopentane	287-92-3	cyclopentane	179.7-550 K, 250 MPa
cyclopropane	75-19-4	cyclopropane	273-473 K, 28 MPa
D4	556-67-2	octamethylcyclotetrasiloxane	290.25-673 K, 30 MPa
D5	541-02-6	decamethylcyclopentasiloxane	300-673 K, 30 MPa
D6	540-97-6	dodecamethylcyclohexasiloxane	270.2-673 K, 30 MPa
decane	124-18-5	decane	243.5-675 K, 800 MPa
deuterium	7782-39-0	deuterium	18.724-600 K, 2000 MPa
diethyl ether	60-29-7	diethyl ether	270-500 K, 40 MPa
dimethyl carbonate	616-38-6	dimethyl ester carbonic acid	277.06-600 K, 60 MPa
dimethylether	115-10-6	methoxymethane	131.66-525 K, 40 MPa
dodecane	112-40-3	dodecane	263.6-700 K, 700 MPa
ethane	74-84-0	ethane	90.368-675 K, 900 MPa
ethanol	64-17-5	ethyl alcohol	159-650 K, 280 MPa
ethylbenzene	100-41-4	phenylethane	178.2-700 K, 60 MPa
ethylene	74-85-1	ethene	103.986-450 K, 300 MPa
fluorine	7782-41-4	fluorine	53.4811-300 K, 20 MPa
heavy water	7789-20-0	deuterium oxide	276.97-800 K, 100 MPa
helium	7440-59-7	helium-4	2.1768-2000 K, 1000 MPa
heptane	142-82-5	heptane	182.55-600 K, 100 MPa
hexane	110-54-3	hexane	177.83-600 K, 100 MPa
hydrogen (normal)	1333-74-0	hydrogen (normal)	13.957-1000 K, 2000 MPa
hydrogen chloride	7647-01-0	hydrogen chloride	155-330 K, 20 MPa
hydrogen sulfide	7783-06-4	hydrogen sulfide	187.7-760 K, 170 MPa
isobutane	75-28-5	2-methylpropane	113.73-575 K, 35 MPa
isobutene	115-11-7	2-methyl-1-propene	132.4-550 K, 50 MPa
isohexane	107-83-5	2-methylpentane	119.6-550 K, 1000 MPa
isooctane	540-84-1	2,2,4-trimethylpentane	165.77-600 K, 1000 MPa
isopentane	78-78-4	2-methylbutane	112.65-500 K, 1000 MPa
krypton	7439-90-9	krypton	115.775-750 K, 200 MPa
m-xylene	108-38-3	1,3-dimethylbenzene	225.3-700 K, 200 MPa
MD2M	141-62-8	decamethyltetrasiloxane	205.2-673 K, 30 MPa
MD3M	141-63-9	dodecamethylpentasiloxane	192-673 K, 30 MPa
MD4M	107-52-8	tetradecamethylhexasiloxane	300-673 K, 30 MPa
MDM	107-51-7	octamethyltrisiloxane	187.2-673 K, 30 MPa
methane	74-82-8	methane	90.6941-625 K, 1000 MPa
methanol	67-56-1	methanol	175.61-620 K, 800 MPa
methyl linoleate	112-63-0	methyl (Z,Z)-9,12-octadecadienoate	238.1-1000 K, 50 MPa
methyl linolenate	301-00-8	methyl (Z,Z,Z)-9,12,15-octadecatrienoate	218.65-1000 K, 50 MPa
methyl oleate	112-62-9	methyl cis-9-octadecenoate	253.47-1000 K, 50 MPa
methyl palmitate	112-39-0	methyl hexadecanoate	302.71-1000 K, 50 MPa
methyl stearate	112-61-8	methyl octadecanoate	311.84-1000 K, 50 MPa
methylcyclohexane	108-87-2	methylcyclohexane	146.7-600 K, 500 MPa
MM	107-46-0	hexamethyldisiloxane	273-673 K, 30 MPa
neon	7440-01-9	neon	24.556-700 K, 700 MPa
neopentane	463-82-1	2,2-dimethylpropane	256.6-550 K, 200 MPa
nitrogen	7727-37-9	nitrogen	63.151-2000 K, 2200 MPa
nitrogen trifluoride	7783-54-2	nitrogen trifluoride	85-500 K, 50 MPa
nitrous oxide	10024-97-2	dinitrogen monoxide	182.33-525 K, 50 MPa
nonane	111-84-2	nonane	219.7-600 K, 800 MPa
o-xylene	95-47-6	1,2-dimethylbenzene	247.985-700 K, 70 MPa
octane	111-65-9	octane	216.37-600 K, 100 MPa
orthohydrogen	1333-74-0o	orthohydrogen	14.008-1000 K, 2000 MPa
oxygen	7782-44-7	oxygen	54.361-2000 K, 82 MPa
p-xylene	106-42-3	1,4-dimethylbenzene	286.4-700 K, 200 MPa
parahydrogen	1333-74-0p	parahydrogen	13.8033-1000 K, 2000 MPa
pentane	109-66-0	pentane	143.47-600 K, 100 MPa
perfluorobutane	355-25-9	decafluorobutane	189-500 K, 30 MPa
perfluoropentane	678-26-2	dodecafluoropentane	148.363-500 K, 30 MPa
propane	74-98-6	propane	85.525-650 K, 1000 MPa
propylcyclohexane	1678-92-8	n-propylcyclohexane	178.2-650 K, 50 MPa
propylene	115-07-1	propene	87.953-575 K, 1000 MPa
propyne	74-99-7	propyne	273-474 K, 32 MPa
sulfur dioxide	7446-09-5	sulfur dioxide	197.7-525 K, 35 MPa
sulfur hexafluoride	2551-62-4	sulfur hexafluoride	223.555-625 K, 150 MPa
toluene	108-88-3	methylbenzene	178-700 K, 500 MPa
trans-butene	624-64-6	trans-2-butene	167.6-525 K, 50 MPa
trifluoroiodomethane	2314-97-8	trifluoroiodomethane	120-420 K, 20 MPa
undecane	1120-21-4	undecane	247.541-700 K, 500 MPa
water	7732-18-5	water	273.16-2000 K, 1000 MPa
xenon	7440-63-3	xenon	161.405-750 K, 700 MPa
1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone	756-13-8	Dodecafluoro-2-methylpentan-3-one	165-500 K, 50 MPa
R11	75-69-4	trichlorofluoromethane	162.68-625 K, 30 MPa
R113	76-13-1	1,1,2-trichloro-1,2,2-trifluoroethane	236.93-525 K, 200 MPa
R114	76-14-2	1,2-dichloro-1,1,2,2-tetrafluoroethane	273.15-507 K, 21 MPa
R115	76-15-3	chloropentafluoroethane	173.75-550 K, 60 MPa
R116	76-16-4	hexafluoroethane	173.1-425 K, 50 MPa
R12	75-71-8	dichlorodifluoromethane	116.099-525 K, 200 MPa
R1216	116-15-4	hexafluoropropene	117.654-400 K, 12 MPa
R123	306-83-2	2,2-dichloro-1,1,1-trifluoroethane	166-600 K, 40 MPa
R1233zd(E)	102687-65-0	1-chloro-3,3,3-trifluoroprop-1-ene	195.15-550 K, 100 MPa
R1234yf	754-12-1	2,3,3,3-tetrafluoroprop-1-ene	220-410 K, 30 MPa
R1234ze(E)	29118-24-9	trans-1,3,3,3-tetrafluoropropene	168.62-420 K, 20 MPa
R124	2837-89-0	1-chloro-1,2,2,2-tetrafluoroethane	120-470 K, 40 MPa
R125	354-33-6	pentafluoroethane	172.52-500 K, 60 MPa
R13	75-72-9	chlorotrifluoromethane	92-403 K, 35 MPa
R134a	811-97-2	1,1,1,2-tetrafluoroethane	169.85-455 K, 70 MPa
R14	75-73-0	tetrafluoromethane	120-623 K, 51 MPa
R141b	1717-00-6	1,1-dichloro-1-fluoroethane	169.68-500 K, 400 MPa
R142b	75-68-3	1-chloro-1,1-difluoroethane	142.72-470 K, 60 MPa
R143a	420-46-2	1,1,1-trifluoroethane	161.34-650 K, 100 MPa
R152a	75-37-6	1,1-difluoroethane	154.56-500 K, 60 MPa
R161	353-36-6	fluoroethane	130-450 K, 5 MPa
R21	75-43-4	dichlorofluoromethane	200-473 K, 138 MPa
R218	76-19-7	octafluoropropane	125.45-440 K, 20 MPa
R22	75-45-6	chlorodifluoromethane	115.73-550 K, 60 MPa
R227ea	431-89-0	1,1,1,2,3,3,3-heptafluoropropane	146.35-475 K, 60 MPa
R23	75-46-7	trifluoromethane	118.02-475 K, 120 MPa
R236ea	431-63-0	1,1,1,2,3,3-hexafluoropropane	240-412 K, 6 MPa
R236fa	690-39-1	1,1,1,3,3,3-hexafluoropropane	179.6-400 K, 70 MPa
R245ca	679-86-7	1,1,2,2,3-pentafluoropropane	191.5-450 K, 10 MPa
R245fa	460-73-1	1,1,1,3,3-pentafluoropropane	171.05-440 K, 200 MPa
R32	75-10-5	difluoromethane	136.34-435 K, 70 MPa
R365mfc	406-58-6	1,1,1,3,3-pentafluorobutane	239-500 K, 35 MPa
R40	74-87-3	methyl chloride	230-630 K, 100 MPa
R41	593-53-3	fluoromethane	129.82-425 K, 70 MPa
RC318	115-25-3	octafluorocyclobutane	233.35-623 K, 60 MPa
RE143a	421-14-7	methyl trifluoromethyl ether	240-420 K, 7.2 MPa
RE245cb2	22410-44-2	methyl-pentafluoroethyl-ether	250-500 K, 20 MPa
RE245fa2	1885-48-9	2,2,2-trifluoroethyl-difluoromethyl-ether	250-500 K, 400 MPa
RE347mcc	375-03-1	methyl-heptafluoropropyl-ether	250-500 K, 20 MPa