297 lines
13 KiB
Plaintext
297 lines
13 KiB
Plaintext
RE143a !Short name
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421-14-7 !CAS number
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Methyl trifluoromethyl ether !Full name
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CH3-O-CF3 !Chemical formula {C2H3F3O}
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HFE-143a !Synonym
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100.0398 !Molar mass [g/mol]
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240. !Triple point temperature [K]
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249.572 !Normal boiling point [K]
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377.921 !Critical temperature [K]
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3635. !Critical pressure [kPa]
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4.648140744 !Critical density [mol/L]
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0.289 !Acentric factor
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2.48 !Dipole moment [Debye]; (computed by A. Kazakov, Nov. 2017, DF-MP2/def2-QZVPD, unc. 0.1-0.15 D)
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IIR !Default reference state
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10.0 !Version number
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???? !UN Number :UN:
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halocb !Family :Family:
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???? !Heating value (upper) [kJ/mol] :Heat:
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1S/C2H3F3O/c1-6-2(3,4)5/h1H3 !Standard InChI String :InChi:
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JRHMNRMPVRXNOS-UHFFFAOYSA-N !Standard InChI Key :InChiKey:
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???? !Alternative fluid for mixing rules :AltID:
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bf6c1a00 !Hash number from InChI Key :Hash:
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!The fluid files contain general information about the fluid in the first 15 to 20 lines, followed by sections for the
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! equations of state, transport equations, and auxiliary equations. Equations of state are listed first. The NIST recommended
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! equations begin with a hash mark (#). The secondary equations begin with the @ symbol. These symbols can be swapped to
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! select a secondary equation as primary and the primary as secondary. The equation of state section also contains auxiliary
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! equations for the ideal gas heat capacity or ideal gas Helmholtz energy. Below the equations of state (both primary and
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! secondary) are the transport equations, first viscosity and then thermal conductivity. These are then followed by the
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! secondary equations if available. The transport section also contains auxiliary equations required to calculate either the
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! dilute gas state or the critical enhancement. At the end of the file are additional but not necessary auxiliary equations,
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! including simple equations for the vapor pressure, saturated liquid and vapor densities, melting line (for some fluids), and
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! sublimation line (for even fewer fluids). This section also contains the equations for dielectric constant and surface
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! tension if available. The sections are divided by different symbols (these being _-+=^*~) to aid the eye in locating a
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! particular section. Secondary equations are indented 10 spaces to avoid confusion with the NIST recommended equations. The
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! end of the fluid file is marked with @END. Anything below that is ignored.
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! compiled by E.W. Lemmon, NIST Physical and Chemical Properties Division, Boulder, Colorado
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! 12-14-11 EWL, Original version.
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! 04-06-13 MLH, Add dipole moment.
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! 05-25-16 MLH, Add predictive thermal conductivity, viscosity, and surface tension models.
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! 11-15-17 MLH, Revise dipole moment, thermal conductivity, viscosity, and surface tension models based on extremely limited data.
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________________________________________________________________________________
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#EOS !---Equation of state---
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FEQ !Helmholtz equation of state for HFE-143a of Akasaka and Kayukawa (2012).
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:TRUECRITICALPOINT: 377.921 4.648140744 !True EOS critical point [K, mol/L] (where dP/dD=0 and d^2P/dD^2=0 at constant T)
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:DOI: 10.1016/j.ijrefrig.2012.01.003
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?
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?```````````````````````````````````````````````````````````````````````````````
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?Akasaka, R. and Kayukawa, Y.,
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? "A Fundamental Equation of State for Trifluoromethyl Methyl Ether
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? (HFE-143m) and Its Application to Refrigeration Cycle Analysis,"
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? Int. J. Refrig., 35(4):1003-1013, 2012. doi: 10.1016/j.ijrefrig.2012.01.003
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?
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?The uncertainties are 0.1% for liquid density, 0.3% in pressure of the
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? vapor phase, and 0.1% for vapor pressure, except in the critical region.
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?
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!```````````````````````````````````````````````````````````````````````````````
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240. !Lower temperature limit [K]
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420. !Upper temperature limit [K]
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7200. !Upper pressure limit [kPa]
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12.62 !Maximum density [mol/L]
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CPP !Pointer to Cp0 model
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100.0398 !Molar mass [g/mol]
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240. !Triple point temperature [K]
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65.35 !Pressure at triple point [kPa]
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12.62 !Density at triple point [mol/L]
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249.572 !Normal boiling point temperature [K]
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0.289 !Acentric factor
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377.921 3635.0 4.648140744 !Tc [K], pc [kPa], rhoc [mol/L]
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377.921 4.648140744 !Reducing parameters [K, mol/L]
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8.314472 !Gas constant [J/mol-K]
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17 4 0 0 0 0 0 0 0 0 0 0 !# terms and # coefs/term for normal terms, Gaussian terms, and Gao terms
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7.7715884 0.682 1. 0. !a(i),t(i),d(i),l(i)
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-8.704275 0.851 1. 0.
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-0.28095049 1.84 1. 0.
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0.14540153 1.87 2. 0.
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0.0092291277 0.353 5. 0.
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-0.21416510 3.92 1. 1.
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0.099475155 1.14 3. 1.
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0.023247135 0.104 5. 1.
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-0.012873573 1.19 7. 1.
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-0.057366549 6.58 1. 2.
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0.36504650 6.73 2. 2.
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-0.25433763 7.99 2. 2.
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-0.090896436 7.31 3. 2.
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0.083503619 7.45 4. 2.
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0.015477603 16.5 2. 3.
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-0.016641941 24.8 3. 3.
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0.0052410163 10.5 5. 3.
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#AUX !---Auxiliary function for Cp0
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CPP !Ideal gas heat capacity function for R-143a of Akasaka and Kayukawa (2012).
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?
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?```````````````````````````````````````````````````````````````````````````````
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?Akasaka, R. and Kayukawa, Y., 2012.
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?
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!```````````````````````````````````````````````````````````````````````````````
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0. !
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10000. !
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0. !
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0. !
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1.0 1.0 !Reducing parameters for T, Cp0
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4 0 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh
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20.37 0.0
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0.2918 1.0
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-0.000195 2.0
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4.65e-8 3.0
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#AUX !---Auxiliary function for PX0
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PX0 !Helmholtz energy ideal-gas function for R-143a of Akasaka and Kayukawa (2012).
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?
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?```````````````````````````````````````````````````````````````````````````````
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?Akasaka, R. and Kayukawa, Y., 2012.
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?
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!```````````````````````````````````````````````````````````````````````````````
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1 5 0 0 0 0 0 0 !Nterms: ai*log(tau**ti); ai*tau**ti; ai*log(1-exp(bi*tau))
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1.4499487026204636 1.0 !ai, ti for [ai*log(tau**ti)] terms
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-7.5730724565886645 0.0 !aj, ti for [ai*tau**ti] terms
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8.0922918999612889 1.0 !aj, ti for [ai*tau**ti] terms
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0.0350954850969392 -1.0
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-0.234531171827e-04 -2.0
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0.559266640510e-08 -3.0
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++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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#TRN !---ECS Transport---
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ECS !Extended Corresponding States model (R134a reference); predictive model for R-E143a.
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:DOI: 10.6028/NIST.IR.8209
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?
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?```````````````````````````````````````````````````````````````````````````````
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?*** ESTIMATION METHOD *** NOT STANDARD REFERENCE QUALITY ***
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?Huber, M.L., "Models for the Viscosity, Thermal Conductivity, and Surface Tension
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? of Selected Pure Fluids as Implemented in REFPROP v10.0," NISTIR 8209, 2018.
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? doi: 10.6028/NIST.IR.8209
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?
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?VISCOSITY
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? Extremely limited experimental data found.
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? Estimated uncertainty in the gas phase 20%, in the saturated liquid 5%, higher at higher pressures.
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?
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?THERMAL CONDUCTIVITY
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? Extremely limited experimental data found.
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? Estimated uncertainty in the gas phase 20%, in the saturated liquid 5%, higher at higher pressures.
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?
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?The Lennard-Jones parameters were estimated with the method of Chung.
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?
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!```````````````````````````````````````````````````````````````````````````````
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240.0 !Lower temperature limit [K]
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420.0 !Upper temperature limit [K]
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7200.0 !Upper pressure limit [kPa]
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12.62 !Maximum density [mol/L]
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FEQ R134A.FLD
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VS1 !Model for reference fluid viscosity
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TC1 !Model for reference fluid thermal conductivity
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NUL !Large molecule identifier
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1 !Lennard-Jones flag (0 or 1) (0 => use estimates)
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0.4847 !Lennard-Jones coefficient sigma [nm] from method Chung
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300.104 !Lennard-Jones coefficient epsilon/kappa [K] from Chung method
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1 0 0 !Number of terms in f_int term in Eucken correlation, spare1, spare2
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0.001129 0. 0. 0. !Coefficient, power of T, spare1, spare2 coeff from re245cb
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1 0 0 !Number of terms in psi (visc shape factor): poly,spare1,spare2
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1.008 0. 0. 0. !Coefficient, power of Tr, power of Dr, spare
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1 0 0 !Number of terms in chi (t.c. shape factor): poly,spare1,spare2
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0.975 0. 0. 0. !Coefficient, power of Tr, power of Dr, spare
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TK3 !Pointer to critical enhancement auxiliary function
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#AUX !---Auxiliary function for the thermal conductivity critical enhancement
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TK3 !Simplified thermal conductivity critical enhancement for R-E143a of Perkins et al. (2013).
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?
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?```````````````````````````````````````````````````````````````````````````````
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?Perkins, R.A., Sengers, J.V., Abdulagatov, I.M., and Huber, M.L.,
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? "Simplified Model for the Critical Thermal-Conductivity Enhancement in Molecular Fluids,"
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? Int. J. Thermophys., 34(2):191-212, 2013. doi: 10.1007/s10765-013-1409-z
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?
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!```````````````````````````````````````````````````````````````````````````````
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0. !
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10000. !
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0. !
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0. !
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9 0 0 0 !# terms: CO2-terms, spare, spare, spare
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1.0 1.0 1.0 !Reducing parameters for T, rho, tcx [mW/(m-K)]
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0.63 !Nu (universal exponent)
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1.239 !Gamma (universal exponent)
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1.02 !R0 (universal amplitude)
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0.063 !Z (universal exponent--not used for t.c., only viscosity)
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1.0 !C (constant in viscosity eqn = 1/[2 - (alpha + gamma)/(2*nu)], but often set to 1)
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0.198e-9 !Xi0 (amplitude) [m]
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0.054 !Gam0 (amplitude) [-]
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5.88e-10 !Qd_inverse (modified effective cutoff parameter) [m]; R125 value
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566.88 !Tref (reference temperature)=1.5*Tc [K]
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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#STN !---Surface tension---
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ST1 !Surface tension model for RE143a of Huber (2018). Fit to extrememly limited experimental data.
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:DOI: 10.6028/NIST.IR.8209
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?
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?```````````````````````````````````````````````````````````````````````````````
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?Huber, M.L., "Models for the Viscosity, Thermal Conductivity, and Surface Tension
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? of Selected Pure Fluids as Implemented in REFPROP v10.0," NISTIR 8209, 2018.
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? doi: 10.6028/NIST.IR.8209
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?
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?Estimated uncertainty is 10%.
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?
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!```````````````````````````````````````````````````````````````````````````````
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0. !
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10000. !
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0. !
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0. !
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1 !Number of terms in surface tension model
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377.921 !Critical temperature used in fit (dummy)
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0.0371 0.98412 !Sigma0 and n 0.0315059
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#PS !---Vapor pressure---
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PS5 !Vapor pressure equation for R-E143a of Akasaka and Kayukawa (2012).
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?
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?```````````````````````````````````````````````````````````````````````````````
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?Functional Form: P=Pc*EXP[SUM(Ni*Theta^ti)*Tc/T] where Theta=1-T/Tc, Tc and Pc
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? are the reducing parameters below, which are followed by rows containing Ni and ti.
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?
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!```````````````````````````````````````````````````````````````````````````````
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0. !
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10000. !
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0. !
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0. !
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377.921 3635.0 !Reducing parameters
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4 0 0 0 0 0 !Number of terms in equation
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-7.44314 1.0
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1.69164 1.5
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-2.27778 2.5
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-4.094 5.0
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#DL !---Saturated liquid density---
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DL1 !Saturated liquid density equation for R-E143a of Akasaka and Kayukawa (2012).
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?
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?```````````````````````````````````````````````````````````````````````````````
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?Functional Form: D=Dc*[1+SUM(Ni*Theta^ti)] where Theta=1-T/Tc, Tc and Dc are
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? the reducing parameters below, which are followed by rows containing Ni and ti.
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?
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!```````````````````````````````````````````````````````````````````````````````
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0. !
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10000. !
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0. !
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0. !
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377.921 4.64814 !Reducing parameters
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4 0 0 0 0 0 !Number of terms in equation
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1.20552 0.33
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1.33568 0.5
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0.0981486 1.5
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0.248917 2.5
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#DV !---Saturated vapor density---
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DV3 !Saturated vapor density equation for R-E143a of Akasaka and Kayukawa (2012).
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?
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?```````````````````````````````````````````````````````````````````````````````
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?Functional Form: D=Dc*EXP[SUM(Ni*Theta^ti)] where Theta=1-T/Tc, Tc and Dc are
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? the reducing parameters below, which are followed by rows containing Ni and ti.
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?
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!```````````````````````````````````````````````````````````````````````````````
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0. !
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10000. !
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0. !
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0. !
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377.921 4.64814 !Reducing parameters
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4 0 0 0 0 0 !Number of terms in equation
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-3.02576 0.38
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-6.97239 1.24
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-20.2601 3.2
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-53.4441 6.9
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@END
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