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Experimental Investigation of Critical Heat Flux in Annulus at Low Pressure and Low Flow Parameters

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00345754" target="_blank" >RIV/68407700:21340/20:00345754 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.14311/APP.2020.28.0050" target="_blank" >https://doi.org/10.14311/APP.2020.28.0050</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.14311/APP.2020.28.0050" target="_blank" >10.14311/APP.2020.28.0050</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Experimental Investigation of Critical Heat Flux in Annulus at Low Pressure and Low Flow Parameters

  • Original language description

    Steady state flow boiling experiments were conducted on a technically smooth Inconel 625 tube with outer diameter 9.1 mm at inlet pressures 131, 220 and 323 kPa, inlet temperatures 62, 78 and 94 °C and approximately 400, 600 and 1000 kg/(m2.s) mass flow. Water of these parameters was entering into the vertically aligned annulus, where the uniformly heated tube was placed until the critical heat flux (CHF) appeared. The experimental data were compared to estimations of CHF by local PGT tube correlation and Groeneveld’s look-up tables for tubes. The results imply that in the region of low pressure and low mass flux, the differences between calculations and experiments are substantial (more than 50 % of CHF). The calculations further imply that look-up tables and tube correlations should be corrected to the annulus geometry. Here, the Doerffer’s approach was chosen and led to a substantial enhancement of CHF estimation. Yet, a new correlation for the region of low pressure and flow is needed.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>ost</sub> - Miscellaneous article in a specialist periodical

  • CEP classification

  • OECD FORD branch

    21100 - Other engineering and technologies

Result continuities

  • Project

  • Continuities

    S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Acta Polytechnica CTU Proceedings

  • ISSN

    2336-5382

  • e-ISSN

    2336-5382

  • Volume of the periodical

    28

  • Issue of the periodical within the volume

    2020

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    9

  • Pages from-to

    50-58

  • UT code for WoS article

  • EID of the result in the Scopus database