ASTM_D_3984_-_13.pdf

Designation:D398413Standard Specification forEthane Thermophysical Property Tables1This standard is issued under the fixed designation D3984;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 The thermophysical property tables for ethane are foruse in the calculation of the pressure-volume-temperature(PVT),thermodynamic,and transport properties of ethane forprocess design and operations.Tables are provided for gaseousand liquid ethane at temperatures between 92 and 600 K atpressures to 20 MPa.Two tables provide properties at theconditions of liquid-vapor equilibrium(saturation properties).A third table provides properties at selected T,p points for theequilibrium phase at those conditions.The tables were devel-oped by the National Institute of Standards and Technologyfrom a Standard Reference Database product REFPROP,ver-sion 9.0.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.2.Applicability2.1 These tables apply directly only to pure gaseous ethane.However,it is expected that they may find substantial use inmathematical models and tables for the thermophysical prop-erties of mixtures containing ethane.3.Tables3.1 These tables were produced by equations from a com-puter package,“NIST Standard Reference Database 23;Ref-erence Fluid Thermodynamic and Transport Properties Data-base(REFPROP):Version 9.0.”A wide selection of units(SIunits,engineering units,chemical units)and additional prop-erties are available with this program.23.2 These thermophysical property tables are:3.2.1 Thermophysical Properties of Ethane Liquid at Vapor-Liquid Equilibrium,in SI units.See Table 1.3.2.2 Thermophysical Properties of Ethane Vapor at Vapor-Liquid Equilibrium,in SI units.See Table 2.3.2.3 Thermophysical Properties of Ethane Along Isobars,in SI units.See Table 3.3.3 The symbols are:T,temperature(K),molar density(moll-1)H,molar enthalpy(Jmol-1)S,molar entropy(JK-1mol-1)Cv,constant volume molar heat capacity(JK-1mol-1)Cp,constant pressure molar heat capacity(JK-1mol-1)c,speed of sound(ms-1),viscosity(Pas),thermal conductivity(mWm-1K-1)3.4 The tabulated thermophysical properties are:,molar density(moll-1)H,molar enthalpy(Jmol-1)S,molar entropy(JK-1mol-1)Cv,constant volume molar heat capacity(JK-1mol-1)Cp,constant pressure molar heat capacity(JK-1mol-1)c,speed of sound(ms-1),viscosity(Pas),thermal conductivity(mWm-1K-1)4.Additional Information4.1 Reference state properties are required to calculatecertain of the thermodynamic properties(enthalpy,entropy,etc.)from an equation of state formulation.The reference stateproperties used to generate the tables in this specification are:enthalpy,H,and entropy,S,at the Normal Boiling Point;184.57K and 0.10133MPa(H=14716 J/mol and S=79.731J/(mol K).The molar mass of ethane is 30.069 g/mol.5.Keywords5.1 ethane gas tables;natural gas;thermodynamic proper-ties of ethane;transport properties of ethane1This specification is under the jurisdiction of ASTM Committee D03 onGaseous Fuels and is the direct responsibility of Subcommittee D03.08 onThermophysical Properties.Current edition approved May 1,2013.Published May 2013.Originallyapproved in 1982.Last previous edition approved in 2008 as D3984 08.DOI:10.1520/D3984-13.2Available from Standard Reference Data,National Institute of Standards andTechnology(NIST),100 Bureau Drive,Stop 3460,Gaithersburg,MD 20899.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 TABLE 1 Thermophysical Properties of Ethane Liquid at Vapor-Liquid EquilibriumTpHSCvCpcKMPamoll-1Jmol-1Jmol-1K-1Jmol-1K-1Jmol-1K-1ms-1PasmWm-1K-190.41.1518E-061.5324E-0611295148.0926.81135.126180.973.04362.9100921.7410E-062.2760E-0611351145.2726.90535.220182.483.08883.0000942.8559E-063.6541E-0611421141.9227.02435.339184.363.14533.1131964.5809E-065.7391E-0611492138.7327.14335.458186.223.20203.2268987.1951E-068.8304E-0611563135.7127.26335.578188.053.25883.34121001.1081E-051.3327E-0511634132.8427.38435.699189.863.31573.45631021.6752E-051.9754E-0511706130.1127.50535.821191.653.37293.57231042.4891E-052.8787E-0511778127.5227.62735.944193.423.43023.68901063.6383E-054.1284E-0511850125.0527.74936.067195.173.48773.80671085.2368E-055.8323E-0511922122.6927.87336.192196.903.54543.92521107.4287E-058.1234E-0511994120.4527.99736.318198.613.60344.04471121.0394E-041.1164E-0412067118.3128.12436.447200.303.66154.16511141.4357E-041.5150E-0412139116.2728.25236.578201.983.71994.28651161.9587E-042.0314E-0412212114.3228.38236.713203.633.77844.40891182.6414E-042.6932E-0412286112.4628.51536.850205.273.83724.53231203.5230E-043.5326E-0412359110.6928.65136.992206.893.89614.65681224.6500E-044.5866E-0412432108.9928.79137.139208.493.95534.782312