Publication detail

EXPERIMENTAL INVESTIGATION OF CRITICAL HEAT FLUX IN ANNULUS AT LOW PRESSURE AND LOW FLOW PARAMETERS

SUK, L. ŠTEVANKA, K. PETROSYAN, T. VLČEK, D.

Original Title

EXPERIMENTAL INVESTIGATION OF CRITICAL HEAT FLUX IN ANNULUS AT LOW PRESSURE AND LOW FLOW PARAMETERS

Type

conference paper

Language

English

Original Abstract

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.

Keywords

CHF, Inconel 625, boiling crisis, abraded surface

Authors

SUK, L.; ŠTEVANKA, K.; PETROSYAN, T.; VLČEK, D.

Released

1. 12. 2020

Publisher

Czech Technical University in Prague

Location

Praha

ISBN

978-80-01-06794-9

Book

ŠIMÁNĚ 2020: Student Conference on Nuclear Engineering

Edition

28

ISBN

2336-5382

Periodical

Acta Polytechnica CTU Proceedings

Year of study

28

Number

1

State

Czech Republic

Pages from

50

Pages to

58

Pages count

9

URL

https://ojs.cvut.cz/ojs/index.php/APP/article/view/6916

Full text in the Digital Library

http://hdl.handle.net/11012/196565

BibTex

@inproceedings{BUT167772,
  author="Daniel {Vlček} and Ladislav {Suk} and Kamil {Števanka} and Taron {Petrosyan}",
  title="EXPERIMENTAL INVESTIGATION OF CRITICAL HEAT FLUX IN ANNULUS AT LOW PRESSURE AND LOW FLOW PARAMETERS",
  booktitle="ŠIMÁNĚ 2020: Student Conference on Nuclear Engineering",
  year="2020",
  series="28",
  journal="Acta Polytechnica CTU Proceedings",
  volume="28",
  number="1",
  pages="50--58",
  publisher="Czech Technical University in Prague",
  address="Praha",
  doi="10.14311/APP.2020.28.0050",
  isbn="978-80-01-06794-9",
  issn="2336-5382",
  url="https://ojs.cvut.cz/ojs/index.php/APP/article/view/6916"
}