Thermodynamics of supersaturated steam: Towards an equation of state
| Autor: | Filip Moučka, Ivo Nezbeda |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Binodal
Equation of state 010405 organic chemistry Chemistry General Chemical Engineering General Physics and Astronomy Thermodynamics 02 engineering and technology 01 natural sciences Virial theorem 0104 chemical sciences Range (mathematics) 020401 chemical engineering Steam turbine Metastability Virial expansion 0204 chemical engineering Physical and Theoretical Chemistry Supercooling |
| Zdroj: | Fluid Phase Equilibria. 484:114-121 |
| ISSN: | 0378-3812 |
| DOI: | 10.1016/j.fluid.2018.11.028 |
| Popis: | Thermodynamics of supersaturated (supercooled) steam at conditions occurring in steam turbines, and inaccessible thus to experiments, has been studied by a number of theoretical and semi-theoretical methods with the goal to assess available theoretical tools for developing an equation of state. Extended virial expansions with different reference systems have been used along with two, qualitatively different equations of state. According to the proposed strategy, all equations were first used for the vapor-liquid coexistence curve and then extended to the metastable region and tested against computer simulation data. Despite the fact that no specificities of supersaturated steam have been accounted for, all the considered methods provide results with deviations from (pseudo)experimental data up to about 5% over the entire range of thermodynamic conditions except the critical region. It turns out that the perturbed virial expansion with a suitably chosen reference system outperforms other methods, including equations of state originally developed for liquid water. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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