Experimental investigation of heat transfer to supercritical pressure R134A in artifially roughened tubes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000147" target="_blank" >RIV/26722445:_____/24:N0000147 - isvavai.cz</a>

Result on the web

<a href="https://asmedigitalcollection.asme.org/ICONE/proceedings-abstract/ICONE31/88261/V006T07A062/1208223" target="_blank" >https://asmedigitalcollection.asme.org/ICONE/proceedings-abstract/ICONE31/88261/V006T07A062/1208223</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/ICONE31-135141" target="_blank" >10.1115/ICONE31-135141</a>

Result language

angličtina

Original language name

Experimental investigation of heat transfer to supercritical pressure R134A in artifially roughened tubes

Original language description

The environment in supercritical water-cooled reactors (SCWR) is highly corrosive. With increasing time of operation, an oxide layer grows on the surfaces of the fuel rod cladding, which increases the roughness of their surface. The aim of this study is the investigation of the effect of the roughness due to corrosion on the heat transfer to a fluid at supercritical pressure conditions. The drastic variations in the thermophysical properties of SCW can lead to a deterioration or an enhancement of the heat transfer. The correct prediction of the heat transfer deterioration, which can cause sharp temperature peaks on the fuel rod cladding is a big challenge. Until the current day, most experimental investigations are conducted, using hydraulically smooth heat transfer surfaces. In the present investigation, the effect of the surface roughness is investigated systematically with experiments, using R134a as a working fluid. In the first step, heat transfer experiments are conducted in a hydraulically smooth directly heated tube, covering a wide range of operating conditions. In the second step, the experiments were repeated, using a tube with a rough inner surface. Based on the results from the two test tubes, the effect of the surface roughness on heat transfer is evaluated.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

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Continuities

R - Projekt Ramcoveho programu EK

Publication year

2024

Confidentiality

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

Article name in the collection

Conference Proceedings : International Conference on Nuclear Engineering

ISBN

978-0-7918-8826-1

ISSN

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e-ISSN

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Number of pages

10

Pages from-to

1-10

Publisher name

ASME

Place of publication

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Event location

Praha

Event date

Aug 4, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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