Anomalous Properties of Some Fluids − with High Relevance in Energy Engineering − in Their Pseudo-critical (Widom) Region

Authors

  • Attila R. Imre
    Affiliation
    Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary; Thermohydraulics Department, Atomic Energy Research, Centre for Energy Research, Hungarian Academy of Sciences (MTA), H-1525 Budapest, P.O.B. 49, Hungary
  • Axel Groniewsky
    Affiliation
    Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary
  • Gábor Györke
    Affiliation
    Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary
  • Adrienn Katona
    Affiliation
    Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary
  • Dávid Velmovszki
    Affiliation
    Department of Energy Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Műegyetem rkp. 3, Hungary
https://doi.org/10.3311/PPch.12905

Abstract

Recent results are shown about the peculiarities of the pseudo-critical region, with special emphasis on properties important for energy production and conversion. The property-map of some materials, which are relevant as model fluids or as working / cooling fluids in energy engineering (argon, methane, water and carbon dioxide) and their relative positions to various adiabats – influencing their stability through the anomalous properties – are presented. Some potential technological problems related to the existence of these anomalies are discussed.

Keywords:

adiabatic processes, stability, compressibility, specific heat, speed of sound, thermal expansion

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Published Online

2019-02-22

How to Cite

Imre, A. R., Groniewsky, A., Györke, G., Katona, A., Velmovszki, D. “Anomalous Properties of Some Fluids − with High Relevance in Energy Engineering − in Their Pseudo-critical (Widom) Region”, Periodica Polytechnica Chemical Engineering, 63(2), pp. 276–285, 2019. https://doi.org/10.3311/PPch.12905

Issue

Vol. 63 No. 2 (2019)

Section

Articles