NUMERICAL INVESTIGATION OF HEAT TRANSFER ON THE OUTER SURFACE OF POLYMERIC HOLLOW FIBERS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F18%3APU130353" target="_blank" >RIV/00216305:26210/18:PU130353 - isvavai.cz</a>

Výsledek na webu

<a href="http://mit.imt.si/Revija/izvodi/mit184/bartuli.pdf" target="_blank" >http://mit.imt.si/Revija/izvodi/mit184/bartuli.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.17222/mit.2016.221" target="_blank" >10.17222/mit.2016.221</a>

Jazyk výsledku

angličtina

Název v původním jazyce

NUMERICAL INVESTIGATION OF HEAT TRANSFER ON THE OUTER SURFACE OF POLYMERIC HOLLOW FIBERS

Popis výsledku v původním jazyce

Polymeric hollow-fiber heat exchangers (PHFHEs) are heat exchangers that use polymeric microchannels as the heat-transfer surface. The main purpose of this work was to determine the optimal arrangement of polymeric hollow fibers in a PHFHE. The object of study was a bundle of parallel polymeric hollow fibers with an outer diameter of 0.8 mm. The heated working fluid flew inside the hollow fibers. The heat was transferred by a cooling medium from the outside of the hollow fibers. Heat-transfer coefficients on the outer surface of the hollow fibers were obtained using computer modelling. For the case of water cooling, a sharp heat-transfer-coefficient increase was observed as the angle alpha between the hollow-fiber position and the direction of the cooling-medium flow increased to 30 degrees; however, its further increase to 45 degrees had no significant effect. With the water cooling, the total heat-transfer coefficient of the PHFHE increased by 35 % and with the air cooling, it increased by 15 %. The angle of 30 degrees can he considered as the optimal angle for manufacturing such PHFHEs.

Název v anglickém jazyce

NUMERICAL INVESTIGATION OF HEAT TRANSFER ON THE OUTER SURFACE OF POLYMERIC HOLLOW FIBERS

Popis výsledku anglicky

Polymeric hollow-fiber heat exchangers (PHFHEs) are heat exchangers that use polymeric microchannels as the heat-transfer surface. The main purpose of this work was to determine the optimal arrangement of polymeric hollow fibers in a PHFHE. The object of study was a bundle of parallel polymeric hollow fibers with an outer diameter of 0.8 mm. The heated working fluid flew inside the hollow fibers. The heat was transferred by a cooling medium from the outside of the hollow fibers. Heat-transfer coefficients on the outer surface of the hollow fibers were obtained using computer modelling. For the case of water cooling, a sharp heat-transfer-coefficient increase was observed as the angle alpha between the hollow-fiber position and the direction of the cooling-medium flow increased to 30 degrees; however, its further increase to 45 degrees had no significant effect. With the water cooling, the total heat-transfer coefficient of the PHFHE increased by 35 % and with the air cooling, it increased by 15 %. The angle of 30 degrees can he considered as the optimal angle for manufacturing such PHFHEs.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Materiali in tehnologije

ISSN

1580-2949

e-ISSN

1580-3414

Svazek periodika

52

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

SI - Slovinská republika

Počet stran výsledku

5

Strana od-do

459-463

Kód UT WoS článku

000442176700012

EID výsledku v databázi Scopus

2-s2.0-85051829408