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
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Czech description
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Classification
Type
J<sub>ost</sub> - Miscellaneous article in a specialist periodical
CEP classification
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OECD FORD branch
21100 - Other engineering and technologies
Result continuities
Project
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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
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EID of the result in the Scopus database
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