Laboratory of Thermophysical Properties

Department:   Department D 2 - Thermodynamics
Head:   Ing. Václav Vinš, Ph.D.

The Laboratory specializes in the development and implementation of highly accurate laboratory methods for the measurement of thermophysical properties of fluids. The research is aimed at thermodynamic and transport properties and especially at state behavior of fluids, thermal conductivity and viscosity. The studied substances are modern progressive media, technically important fluids, reference fluids and standards of thermophysical properties. The Laboratory also develops constitutive models of fluid properties based on its own results and on the results of other laboratories. The models are developed as computationally effective, i.e., explicit, simple and easily implementable. They are intended for use in industry, research and development.

Papers

Journal papers

  • V. Vinš, J. Hykl, J. Hrubý: Surface tension of seawater at low temperatures including supercooled region down to – 25 °C, Marine Chemistry, 213, 13-23 (2019) doi.org/10.1016/j.marchem.2019.05.001
  • D. Celný, V. Vinš, J. Hrubý: Modelling of planar and spherical phase interfaces for multicomponent systems using density gradient theory, Fluid Phase Equilibria, 483, 70-83 (2019) doi.org/10.1016/j.fluid.2018.10.014
  • J. Klomfar, M. Součková, J. Pátek: Experimental densities and surface tension and models generating the best-current-knowledge values of them for members of 1-Cn-3-methylimidazolium bromide homologous series, Journal of Chemical Thermodynamics, 118, 225-234 (2018) doi.org/10.1016/j.jct.2017.11.012
  • M. Součková, J. Klomfar, J. Pátek: Group contribution and parachor analysis of experimental data on density and surface tension for members of the homologous series of 1-Cn-3-methylimidazolium chlorides, Fluid Phase Equilibria, 454, 43-56 (2017) doi:10.1016/j.fluid.2017.08.022
  • J. Klomfar, M. Součková, J. Pátek: Surface tension and density for members of four ionic liquid homologous series containing a pyridinium based-cation and the bis(trifluoromethylsulfonyl)imide anion, Fluid Phase Equilibria, 431, 24-33 (2017) doi: 10.1016/j.fluid.2016.10.004
  • M. Součková, J. Klomfar, J. Pátek: Surface tension and 0.1 MPa density of 1-alkyl-3-methylimidazolium tetrafluoroborates in a homologous series perspective, Journal of Chemical Thermodynamics, 100, 79-88 (2016) doi:10.1016/j.jct.2016.04.008
  • J. Pátek, M. Součková, J. Klomfar:  Generation of Recommendable Values for the Surface Tension of Water Using a Nonparametric Regression,  Journal of Chemical and Engineering Data, 61, 928-935 (2016)   doi: 10.1021/acs.jced.5b00776
  • M. Součková, J. Klomfar, J. Pátek: Surface tension and 0.1 MPa density for members of homologous series of ionic liquids composed of imidazolium-, pyridinium-, and pyrrolidinium-based cations and of cyano-groups containing anions,  Fluid Phase Equilibria, 406, 181-193 (2015)   doi:10.1016/j.fluid.2015.07.036
  • J. Klomfar, M. Součková, J. Pátek: Low Temperature and High Pressure p–ρ–T Relation for 1-(2-Methoxyethyl)-1-methylpyrrolidinium Bis(trifluoromethylsulfonyl)imide and 1-Cn-3-methylimidazolium Thiocyanate with n=2 and 4, Journal of Chemical and Engineering Data, 60, 1855-1867 (2015)   doi: 10.1021/acs.jced.5b00074
  • M. Součková, J. Klomfar, J. Pátek: Surface tension and 0.1 MPa density data for 1-Cn-3-methylimidazolium iodides with n= 3, 4, and 6, validated using parachor and group contribution model, Journal of Chemical Thermodynamics,  83, 52-60 (2015)   doi:10.1016/j.jct.2014.11.016 
  • J. Klomfar, M. Součková, J. Pátek: Group contribution and parachor analysis of experimental data on 0.1 MPa densities and surface tension for six still poorly studied ionic liquids with the [PF6] anion, Fluid Phase Equilibria, 385, 62-71  (2015)   doi:10.1016/j.fluid.2014.10.029
  • J. Klomfar, M. Součková, J. Pátek: Low Temperature Densities from (218 to 364) K and up to 50 MPa in Pressure and Surface Tension for trihexyl(tetradecyl)phosphonium Bis(trifluoromethylsulfonyl)imide and Dicyanamide and 1-Hexyl-3-methylimidazolium Hexafluorophosphate. Journal of Chemical and Engineering Data, 59, 2263-2274 (2014)   doi: 10.1021/je500239t
  • M. Součková, J. Klomfar, J. Pátek: Measurements and group contribution analysis of 0.1 MPa densities for still poorly studied ionic liquids with the [PF6] and [NTf2] anions. Journal of Chemical Thermodynamics, 77, 31-39  (2014)   doi:10.1016/j.jct.2014.04.017
  • M. Součková, J. Klomfar, J. Pátek: Standard reference data for the air–liquid and vapor–liquid surface tension of benzene. Fluid Phase Equilibria, 356, 329–337 (2013)    doi:10.1016/j.fluid.2013.07.053
  • J. Klomfar, M. Součková, J. Pátek: Surface Tension and p−ρ−T Data for 1,1,1,3,3-Pentafluorobutane (HFC-365mfc) and 1,1,1,2,2,3,3-Heptafluoro-3-methoxy-propane (HFE-347mcc). Journal of Chemical and Engineering Data, 58, 2316−2325 (2013)   doi: 10.1021/je4004542
  • J. Klomfar, M. Součková, J. Pátek : Liquid-Phase p–ρ–T Data for 2,3,3,3-Tetrafluoroprop-1-ene (R-1234yf) and 1,1,2,3,3,3-Hexafluoroprop-1-ene (R-1216) at Temperatures from (208 to 353) K under Pressures up to 40 MPa. Journal of Chemical and Engineering Data,  57, 3283–3289 (2012)   doi: 10.1021/je3009304
  • J. Klomfar, M. Součková, J. Pátek: Isochoric p–ρ–T Measurements for trans-1,3,3,3-Tetrafluoropropene [R-1234ze(E)] and Trifluoroiodomethane (R13I1) at Temperatures from (205 to 353) K under Pressures up to 40 MPa. Journal of Chemical and Engineering Data,  57 , 3270–3277 (2012)   doi: 10.1021/je3008974
  • M. Součková, J. Klomfar, J. Pátek:  Surface tension and 0.1MPa densities of imidazolium-, pyridinium-, pyrrolidinium-, and piperidinium-based tris(pentafluoroethyl)trifluorophosphate ionic liquids.  Fluid Phase Equilibria,  333, 38 - 46 (2012)   doi:10.1016/j.fluid.2012.07.013
  • J. Klomfar, M. Součková, J. Pátek:  Experimental Study of p–ρ–T Relationship of Compressed Liquid Phase for Octafluoropropane and Two near Azeotropic Ternary HFC/HC Mixtures. Journal of Chemical and Engineering Data,  57, 1627-1634 (2012)   doi: 10.1021/je300148f
  • J. Klomfar, M. Součková, J. PátekP–ρ–T Measurements for 1-Ethyl and 1-Butyl-3-methylimidazolium Dicyanamides from Their Melting Temperature to 353 K and up to 60 MPa in Pressure.  Journal of Chemical and Engineering Data,  57, 1213-1221  (2012)   doi: 10.1021/je201283n
  • J. Klomfar, M. Součková, J. PátekP–ρ–T Measurements for 1-Alkyl-3-methylimidazolium-Based Ionic Liquids with Tetrafluoroborate and a Trifluoromethanesulfonate Anion. Journal of Chemical and Engineering Data, 57, 708-720 (2012)   doi: 10.1021/je200903m
  • M. Součková, J. Klomfar, J. Pátek: Temperature dependence of the surface tension and 0.1 MPa density for 1-Cn-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate with n = 2, 4, and 6. Journal of Chemical Thermodynamics, 48, 267–275 (2012)   doi:10.1016/j.jct.2011.12.033
  • J. Klomfar, M. Součková, J. Pátek:Temperature Dependence of the Surface Tension and Density at 0.1 MPa for 1-Ethyl- and 1-Butyl-3-methylimidazolium Dicyanamide. Journal of Chemical and Engineering Data, 56, 3454–3462 (2011)   doi: 10.1021/je200502j
  • M. Součková, J. Klomfar, J. Pátek: Surface tension of 1-alkyl-3-methylimidazolium based ionic liquids with trifluoromethanesulfonate and tetrafluoroborate anion. Fluid Phase Equilibria, 303, 184-190 (2011)   doi:10.1016/j.fluid.2011.01.027
  • J. Klomfar, M. Součková, J. Pátek: Experimental p-ρ-T Data for 1-Butyl-3-methylimidazolium Tetrafluoroborate at Temperatures from (240 to 353) K and at Pressures up to 60 MPa. Journal of Chemical and Engineering Data, 56, 426-436 (2011)   doi: 10.1021/je1007907
  • J. Klomfar, M. Součková, J. Pátek: Temperature Dependence Measurements of the Density at 0.1 MPa for 1-Alkyl-3-methylimidazolium-Based Ionic Liquids with the Trifluoromethanesulfonate and Tetraborate Anion. Journal of Chemical and Engineering Data, 55, 4054-4057 (2010)   doi: 10.1021/je100185e
  • J. Klomfar, M. Součková, J. Pátek: Surface Tension Measurements with validated accuracy for four 1-alkyl-3-methylimidazolium-based ionic liquids . Journal of Chemical Thermodynamics, 42, 323-329 (2010)   doi:10.1016/j.jct.2009.09.007
  • J. Klomfar, J. Pátek, M. Součková: Buoyancy density measurements for 1-alkyl-3-methylimidazolium based ionic liquids with tetrafluoroborate anion. Fluid Phase Equilibria, 282, 31-37 (2009)   doi:10.1016/j.fluid.2009.04.021
  • J. Klomfar, M. Součková, J. Pátek: Surface Tension Measurements for Four 1-Alkyl-3-methylimidazolium-Based Ionic Liquids with Hexafluorophosphate Anion. Journal of Chemical and Engineering Data, 54, 1389-1394 (2009)   doi: 10.1021/je800895q
  • J. Pátek, J. Klomfar: A simple formulation for thermodynamic properties of steam from 273 to 523 K, explicit in temperature and pressure. International Journal of Refrigeration, 32, 1123-1125 (2009)   doi:10.1016/j.ijrefrig.2008.12.010
  • J. Pátek, J. Hrubý, J. Klomfar, M. Součková, A. H. Harvey: Reference Correlations for Thermophysical Properties of Liquid Water at 0.1 MPa. Journal of Physical and Chemical Reference Data, 38, 21-29 (2009)   doi: 10.1063/1.3043575
  • J. Pátek, J. Klomfar, M. Součková: Solid-Liquid Equilibrium in the System of CaCl2-H2O with Special Regard to the Transition Points. Journal of Chemical and Engineering Data, 53, 2260-2271 (2008)   doi: 10.1021/je800009w
  • M. Součková, J. Klomfar, J. Pátek: Measurement and Correlation of the Surface Tension-Temperature Relation for Methanol. Journal of Chemical and Engineering Data, 53, 2233-2236  (2008)   doi: 10.1021/je8003468
  • J. Pátek, J. Klomfar: Thermodynamic properties of the LiCl-H2O system at vapor-liquid equilibrium from 273 to 400K. International Journal of Refrigeration, 31, 287-303 (2008)   doi:10.1016/j.ijrefrig.2007.05.003
  • J. Pátek, J. Klomfar: Solid-liquid phase equilibrium in the systems of LiBr-H2O and LiCl-H2O. Fluid Phase Equilibria, 250, 138-149 (2006)   doi:10.1016/j.fluid.2006.09.005
  • J. Pátek, J. Klomfar: A computationally effective formulation of the thermodynamic properties of LiBr-H2O solutions from 273 to 500 K over full composition range. International Journal of Refrigeration, 29, 566-578 (2006)   doi:10.1016/j.ijrefrig.2005.10.007
  • J. Pátek, J. Klomfar, L. Čapla, P. Buryan: Thermal conductivity of carbon dioxide-methane mixtures at temperatures between 300 and 425 K and at pressures up to 12 MPa. International Journal of Thermophysics, 26, 577-592 (2005)   doi: 10.1007/s10765-005-5566-6
  • J. Pátek, J. Klomfar, L. Čapla, P. Buryan: Thermal conductivity of nitrogen-methane mixtures at temperatures between 300 and 425 K and at pressures up to 16 MPa. International Journal of Thermophysics, 24, 923- 935 (2003)   doi: 10.1023/A:1025024127880
  • J. Pátek, J. Klomfar: Measurement of the thermal conductivity of argon and methane: a test of a transient hot-wire apparatus. Fluid Phase Equilibria, 198, 147-163 (2002)   doi:10.1016/S0378-3812(01)00763-4
  • J. Pátek, J. Klomfar, J. Pražák, O. Šifner: (p,ρ, T) behavior of 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea) measured with a Burnett apparatus. Journal of Chemical Thermodynamics, 30, 1159-1172 (1998)   doi:10.1006/jcht.1998.0383
  • J. Pátek: Functional forms to describe thermodynamic properties of gases for fast calculations. Journal of Engineering for Gas Turbines and Power, 118, 210-213 (1996)
  • J. Pátek, J. Klomfar: Simple functions for fast calculations of selected thermodynamic properties of the ammonia-water system. International Journal of Refrigeration, 18 [4] 228-234 (1995)   doi:10.1016/0140-7007(95)00006-W
  • O. Šifner, J. Klomfar: Thermodynamic properties of xenon from the triple point to 800 K with pressures up to 350 MPa. Journal of Physical and Chemical Reference Data, 23 [1] 63-152 (1994)   doi: 10.1063/1.555956
  • J. Klomfar, J. Pátek: An apparatus to measure the p-v-T behaviour of fluids based on the constant-volume method. IT News of the Institute of Thermomechanics 3 [3] 9-14 (1994)
  • J. Klomfar, J. Hrubý, O. Šifner: Measurements of the (T, p, ρ) behaviour of 1,1,1,2,3,3,3-heptafluoropropane (refrigerant R227) in the liquid phase. Journal of Chemical Thermodynamics, 26, 965-970 (1994)   doi:10.1006/jcht.1994.1113
  • J. Pátek, O. Šifner: Fast calculations of the properties of superheated steam from the saturation curve up to 600 °C and 30 MPa. Nuclear Engineering and Design, 148, 515-520, (1994)
  • J. Hrubý, J. Klomfar, O. Šifner: (T, p, ρ) relation of liquid methanol at temperatures from 205 K to 321 K and pressure up to 50 MPa. Journal of Chemical Thermodynamics, 25 [10] 1229-1242 (1993)   doi:10.1006/jcht.1993.1121
  • J. Klomfar, J. Hrubý, O. Šifner: Measurements of the p-v-T behavior of refrigerant R134a in the liquid phase. International Journal of Thermophysics, 14 [4] 727-738 (1993)   doi: 10.1007/BF00502104

Technical reports (in English)

  • J. Pátek, J. Klomfar, J. Pražák: Measurement of thermal conductivity of selected lubricants. Part 2: Triton SE 170, EA 318/2, EA 318/3, EA 318/18, and EA 318/32. Prague T-454/98 Institute of Thermomechanics AS CR 1998
  • J. Pátek, J. Klomfar, J. Pražák: Measurement of thermal conductivity of selected lubricants. Part 1: Triton SE 170-R134 (introductory study). Prague T-448/98 Institute of Thermomechanics AS CR 1998

Conferences

  • L. Čapla, P. Buryan, J. Pátek, J. Klomfar: Measurement and prediction of transport properties of natural gases. Konference 50. let Ústavu plynárenství, koksochemie a ochrany ovzduší : sborník příspěvků, Praha: VŠCHT, 2003, pp. 18-29, Praha (CZ), 3.- 5. 9. 2003, ISBN 80-7080-522-6, in Czech
  • L. Čapla, P. Buryan, J. Pátek, J. Klomfar, M. Rottner: Accuracy assessment of the prediction scheme for the thermal conductivity of natural gases. Sborník příspěvků konference absolventů kurzu celoživotního vzdělávání - plynárenství u příležitosti 50. let FTOP VŠCHT Praha /3./., Praha VŠCHT 2003, pp. 50-56, Znojmo (CZ), 24.- 25.4. 2003, ISBN 80-7080-512-9, in Czech
  • J. Pátek, J. Klomfar, L. Čapla, P. Buryan, M. Rottner: Thermal conductivity measurement on two samples of natural gases. Mezinárodní konference kursu celoživotního vzdělávání. Praha VŠCHT 2002, pp. 24-36., Pavlov (CZ), 30.9.- 2. 10.2002, ISBN 80-7080-494-7, in Czech
  • J. Pátek, J. Klomfar: Prediction of the transport properties of multicomponent dense gas mixtures. Engineering Mechanics 2001, Svratka 14. – 17. 5. 2001
  • J. Pátek, J. Klomfar: Thermal conductivity of methane and natural gases measured with a hot-wire apparatus. Engineering mechanics 2000., pp. 225-230, Svratka (CZ), 15.- 18. 5. 2000
  • J. Pátek, J. Klomfar, J. Pražák: An apparatus to measure (p,ρ,T) behaviour of gases by the Burnett method. Engineering mechanics 1999, pp. 711-716, Svratka (CZ), 17.- 20. 5. 1999
  • J. Pátek, J. Klomfar, J. Pražák.: Transient hot-wire apparatus to measure thermal conductivity of fluids. Engineering mechanics 1998, pp. 577-582, Svratka (CZ), 11.- 14. 5. 1998, in Czech
  • J. Pražák, J. Pátek: Calculations and prediction of the transport properties of new refrigerants. Engineering Mechanics 1997,pp. 85-86., Svratka (CZ), 12.- 15. 5. 1997, in Czech
  • J. Pátek, J. Klomfar, J. Pražák, O. Šifner: Measurement of pvT behavior of ecologically safe refrigerants. 12th International Congress of Chemical and Process Engineering CHISA 1996, pp. 36, Praque (CZ), 25.- 30. 8. 1996
  • J. Pražák, J. Pátek: Calculations and estimations of transport properties of new refrigerants. 12th International Congress of Chemical and Process Engineering CHISA 1996., pp. 37, Prague (CZ), 25.- 30. 8. 1996
  • J. Pražák, J. Pátek: Development of the free convection in a hot-wire apparatus. Conference book 14th European conference on thermophysical properties, pp. 316, Lyon (FR), 16.- 19. 9. 1996
  • J. Pražák, J. Pátek: Development of the free convection in vertical cylinder with axial heater. 2nd EUROPEAN Fluid Mechanics Conference Abstracts of Papers. pp. 1, Warsawa (PL), 20.- 24. 9. 1994