v9.1 [May 1, 2013]
Enhancements have been made to most areas of the NIST REFPROP program, including the graphical interface, the Excel spreadsheet, the Fortran files (i.e., core property routines), the sample programs in C++, MatLab, VB, etc., and additional fluids. The number of enhancements has been substantial, with some of the more important ones listed below:
- Convergence along the saturation lines is now much better and faster for complex mixtures due to new algorithms for finding phase boundaries, the addition of analytical derivatives in the calculation of the fugacity, and spline curves to provide initial inputs to the phase boundary routines.
- The FORTRAN code was organized to be threadsafe and allow multi-core processing.
- A 64-bit version of the DLL is available for use with Excel or Matlab.
- The addition of the following fluids: cyclopentane, diethyl ether, ethylbenzene, hydrogen chloride, isooctane, m-xylene, Novec649, o-xylene, p-xylene, RE143a, R40, R1216, RE245cb2, RE245fa2, RE347mcc, R1233zd.
- The equations of state have been revised for benzene, cyclohexane, deuterium, dimethyl carbonate, ethanol, helium, R161, and R1234ze.
- Transport equations have been added or modified for many of the fluids, including: hydrogen, Novec649, parahydrogen, deuterium, isooctane, benzene, toluene, SO2, hexane, heptane, RE347mcc, R236fa, R236ea, R245fa, SF6, ethanol, water, and all of the siloxanes.
- MatLab routines now use the Refprop DLL directly and can be directly modified.
- Additional plots for analyzing equations of state are available.
Version 9.1 includes 121 pure fluids, 5 pseudo-pure fluids (such as air), and mixtures with up to 20 components:
- The typical natural gas constituents methane, ethane, propane, butane, isobutane, pentane, isopentane, hexane, isohexane, heptane, octane, nonane, decane, undecane, dodecane, carbon dioxide, carbon monoxide, hydrogen, nitrogen, and water.
- The hydrocarbons acetone, benzene, butene, cis-butene, cyclohexane, cyclopentane, cyclopropane, ethylene, isobutene, isooctane, methylcyclohexane, propylcyclohexane, neopentane, propyne, trans-butene, and toluene.
- The HFCs R23, R32, R41, R125, R134a, R143a, R152a, R161, R227ea, R236ea, R236fa, R245ca, R245fa, R365mfc, R1233zd(E), R1234yf, and R1234ze(E).
- The refrigerant ethers RE143a, RE245cb2, RE245fa2, and RE347mcc (HFE-7000).
- The HCFCs R21, R22, R123, R124, R141b, and R142b.
- The traditional CFCs R11, R12, R13, R113, R114, and R115.
- The fluorocarbons R14, R116, R218, R1216, C4F10, C5F12, and RC318.
- The "natural" refrigerants ammonia, carbon dioxide, propane, isobutane, and propylene.
- The main air constituents nitrogen, oxygen, and argon.
- The noble elements helium, argon, neon, krypton, and xenon.
- The cryogens argon, carbon monoxide, deuterium, krypton, neon, nitrogen trifluoride, nitrogen, fluorine, helium, methane, oxygen, normal hydrogen, parahydrogen, and orthohydrogen.
- Water (as a pure fluid, or mixed with ammonia).
- Miscellaneous substances including carbonyl sulfide, diethyl ether, dimethyl carbonate, dimethyl ether, ethanol, heavy water, hydrogen chloride, hydrogen sulfide, methanol, methyl chloride, nitrous oxide, Novec-649, sulfur hexafluoride, sulfur dioxide, and trifluoroiodomethane.
- The xylenes m-xylene, o-xylene, p-xylene, and ethylbenzene.
- The FAMES (fatty acid methyl esters, i.e., biodiesel constituents) methyl oleate, methyl palmitate, methyl stearate, methyl linoleate, and methyl linolenate.
- The siloxanes octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, tetradecamethylhexasiloxane, octamethyltrisiloxane, and hexamethyldisiloxane.
- 79 predefined mixtures (such as R407C, R410A, and air); the user may define and store others.
