Intensification of heat transfer of polymeric hollow fiber heat exchangers by chaotisation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F17%3APU122103" target="_blank" >RIV/00216305:26210/17:PU122103 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.sciencedirect.com/science/article/pii/S1359431116330770" target="_blank" >http://www.sciencedirect.com/science/article/pii/S1359431116330770</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.applthermaleng.2016.11.038" target="_blank" >10.1016/j.applthermaleng.2016.11.038</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Intensification of heat transfer of polymeric hollow fiber heat exchangers by chaotisation

Popis výsledku v původním jazyce

Flexible polymeric hollow fibers are used as heat transfer elements. A potted bundle of several hundred such fibers can be used as a heat exchanger in different ways. The simplest application is a submerged bundle. The fibers studied in this paper have outside diameters below 0.8 mm. Such very small-diameter polymer fibers significantly facilitate heat transfer. However, these potted sets of fibers must be designed to guarantee that all fibers are in direct contact with the surrounding stream of fluid. It is possible to use textile technologies to keep fibers strictly parallel and separated. However, a parallel arrangement can be expensive and is not flexible. A low-cost variant utilizes bundle chaotisation, which means that each fiber has a unique shape. The consequence is that their mutual mechanical contacts are point-wise. Several methods of chaotisation are studied in this paper. The best variant is a permanent fiber deformation/chaotisation of fibers using integrated heating/cooling and stretching. The tested CFPFHEs (Chaotised Flexible Polymeric Fiber Heat Exchangers) had an overall heat transfer area of 1 m2, and its length was approximately 700 mm. It achieved a water/air overall heat transfer coefficient of 100 W/m2 K with an outside air flow of 2 m/s.

Název v anglickém jazyce

Intensification of heat transfer of polymeric hollow fiber heat exchangers by chaotisation

Popis výsledku anglicky

Flexible polymeric hollow fibers are used as heat transfer elements. A potted bundle of several hundred such fibers can be used as a heat exchanger in different ways. The simplest application is a submerged bundle. The fibers studied in this paper have outside diameters below 0.8 mm. Such very small-diameter polymer fibers significantly facilitate heat transfer. However, these potted sets of fibers must be designed to guarantee that all fibers are in direct contact with the surrounding stream of fluid. It is possible to use textile technologies to keep fibers strictly parallel and separated. However, a parallel arrangement can be expensive and is not flexible. A low-cost variant utilizes bundle chaotisation, which means that each fiber has a unique shape. The consequence is that their mutual mechanical contacts are point-wise. Several methods of chaotisation are studied in this paper. The best variant is a permanent fiber deformation/chaotisation of fibers using integrated heating/cooling and stretching. The tested CFPFHEs (Chaotised Flexible Polymeric Fiber Heat Exchangers) had an overall heat transfer area of 1 m2, and its length was approximately 700 mm. It achieved a water/air overall heat transfer coefficient of 100 W/m2 K with an outside air flow of 2 m/s.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

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

2017

Kód důvěrnosti údajů

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

Název periodika

Applied Thermal Engineering

ISSN

1359-4311

e-ISSN

—

Svazek periodika

neuveden

Číslo periodika v rámci svazku

113

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

632-638

Kód UT WoS článku

000394723300058

EID výsledku v databázi Scopus

2-s2.0-84995622061