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The possibility of direct gas-to-solid nucleation mechanism in water vapor
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SYSNO ASEP 0312043 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title The possibility of direct gas-to-solid nucleation mechanism in water vapor Title Možnost přímého průběhu nukleace z plynné fáze do pevné fáze při Author(s) Němec, Tomáš (UT-L) RID, ORCID Source Title Water, Steam, and Aqueous Solutions Advances in Science and Technology for Power Genetation : Proceedings of the 15th International Conference on the Properties of Water and Steam, XV. - Berlín : VDI - The Association of German Engineers,GET - Society for Energy Technology, 2008 / Span R. ; Weber I. - ISBN 978-3-931384-64-7 Pages s. 1-7 Number of pages 8 s. Publication form CD ROM - CD ROM Action ICPWS /15./ Event date 07.09.2008-11.09.2008 VEvent location Berlín Country DE - Germany Event type WRD Language eng - English Country DE - Germany Keywords nucleation ; pure water ; gas-to-solid Subject RIV BJ - Thermodynamics R&D Projects KJB400760701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z20760514 - UT-L (2005-2011) Annotation Nucleation processes in pure water are investigated from the point of view of the Classical Nucleation Theory (CNT). It is shown that it may be possible to remove the significant discrepancies between the nucleation rates predicted by the CNT and the experimentally measured nucleation rates below 240 K by theoretically allowing the nuclei to form as solid clusters. The only drawback is that an estimation of the unknown surface energy of the vapor-ice interface needs to be performed. Then the CNT nucleation rates differ in less than one order of magnitude from the available experimental data in the temperature range 200 – 260 K. A line can be found in the saturation-temperature plane that separates the region of gas-to-liquid from the gas-to-solid nucleation. A change of slope in the nucleation rate vs. temperature dependence is observed at the transition line. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2009
Number of the records: 1