Measurement of heat transfer coefficient in two phase flows of radiation-resistant zeotropic C2F6/C3F8 blends

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00314548" target="_blank" >RIV/68407700:21220/17:00314548 - isvavai.cz</a>

Výsledek na webu

<a href="http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=1&SID=P1BWktaRda597Bkje5n&page=1&doc=1&cacheurlFromRightClick=no" target="_blank" >http://apps.webofknowledge.com/full_record.do?product=WOS&search_mode=GeneralSearch&qid=1&SID=P1BWktaRda597Bkje5n&page=1&doc=1&cacheurlFromRightClick=no</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2017.05.049" target="_blank" >10.1016/j.ijheatmasstransfer.2017.05.049</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Measurement of heat transfer coefficient in two phase flows of radiation-resistant zeotropic C2F6/C3F8 blends

Popis výsledku v původním jazyce

We have measured the flow boiling heat transfer coefficient (HTC) of saturated fluorocarbon blends in a horizontal copper-nickel tube with a diameter of 4 mm. Direct (Joule) heating of the tube wall was used to obtain heat fluxes from 5 to 13.7 kW m(-2). Two different injection capillaries were used, permitting measurements at mass fluxes varying between 94 and 164 kg m(-2) s(-1). The evaporation pressure was approximately 0.2 MPa for the mass fluxes close to 164 kg m(-2) s(-1) and 0.15 MPa for the lower mass fluxes. As expected, the HTC in pure C3F8 was higher than in blends with increasing C2F6 content. Nevertheless, the study confirmed that the ATLAS SCT could be operated at full power dissipation with cooling tube temperatures up to 10 degrees C colder than in pure C3F8 with C3F8/C2F6 blends having relatively modest values of HTCs in the range 1500-4000 W m(-2) K-1.

Název v anglickém jazyce

Measurement of heat transfer coefficient in two phase flows of radiation-resistant zeotropic C2F6/C3F8 blends

Popis výsledku anglicky

We have measured the flow boiling heat transfer coefficient (HTC) of saturated fluorocarbon blends in a horizontal copper-nickel tube with a diameter of 4 mm. Direct (Joule) heating of the tube wall was used to obtain heat fluxes from 5 to 13.7 kW m(-2). Two different injection capillaries were used, permitting measurements at mass fluxes varying between 94 and 164 kg m(-2) s(-1). The evaporation pressure was approximately 0.2 MPa for the mass fluxes close to 164 kg m(-2) s(-1) and 0.15 MPa for the lower mass fluxes. As expected, the HTC in pure C3F8 was higher than in blends with increasing C2F6 content. Nevertheless, the study confirmed that the ATLAS SCT could be operated at full power dissipation with cooling tube temperatures up to 10 degrees C colder than in pure C3F8 with C3F8/C2F6 blends having relatively modest values of HTCs in the range 1500-4000 W m(-2) K-1.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/LA08032" target="_blank" >LA08032: Mezinárodní experiment ATLAS-CERN</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

International Journal of Heat and Mass Transfer

ISSN

0017-9310

e-ISSN

1879-2189

Svazek periodika

113

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

246-256

Kód UT WoS článku

000406731300025

EID výsledku v databázi Scopus

2-s2.0-85019672448