Limits and Use of Polymeric Hollow Fibers as Material for Heat Transfer Surfaces

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F23%3APU147652" target="_blank" >RIV/00216305:26210/23:PU147652 - isvavai.cz</a>

Result on the web

<a href="https://ieeexplore.ieee.org/document/10036675" target="_blank" >https://ieeexplore.ieee.org/document/10036675</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/AMSE51862.2022.10036675" target="_blank" >10.1109/AMSE51862.2022.10036675</a>

Result language

angličtina

Original language name

Limits and Use of Polymeric Hollow Fibers as Material for Heat Transfer Surfaces

Original language description

Usage of plastic tubes as heat transfer surface is not a completely new issue. In 2001 a nylon car radiator was tested. Similar heat exchangers using polymeric tubes with wall thickness about 1 mm are used now in chemical industry. Low overall heat transfer coefficient of the heat exchangers with plastic tubes is cause dominantly by thick heat transfer wall and low thermal conductivity. Polymeric hollow fiber heat transfer surfaces were presented for the first time in 2004 in shell and tube heat exchanger. The paper describe progress in study of these heat transfer surfaces since that time. Typical outer diameter of fibers is in the range from 0.6 to 1.3 mm and the thickness of the wall is about 10 % of the outer diameter. Reduction of the wall thickness to about 0.1 mm reduce significantly thermal resistance. Another advantage of hollow fibers is physical fact that convective heat transfer coefficient grows with diminishing the heat transfer surfaces. Hollow polymeric fibers are made by extrusion, and production technology limits the choice of suitable polymers. Nevertheless, there are number of materials that can be extruded in small dimensions with operation temperature from 80°C to 230°C. Even if the fibers have wall thickness 0.08 mm to 0.15 mm it can withstand internal pressure of 5 to 20 MPa at room temperatures and some materials pressure of 10 MPa at temperature 120°C. Three materials of heat transfer surfaces are discussed in the paper. Polypropylene can be used for long term load by temperatures to 80°C and internal pressure of 1 MPa. This material is suitable for variety of purposes including food and chemical industry. Higher temperatures are demanded for car industry where heat exchangers should work up to 130 °C. Typical materials for medium temperature range is polyamide. Thermoplastic polymer polyether ether ketone (PEEK) can be used for extrusion of hollow fibers used for application where temperatures up to 230°C are demanded. These heat exchanger

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20303 - Thermodynamics

Project

<a href="/en/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Research centre for low-carbon energy technologies</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Article name in the collection

Sborník z konference "2022 International Congress on Advanced Materials Sciences and Engineering (AMSE)"

ISBN

978-1-6654-4718-8

ISSN

—

e-ISSN

—

Number of pages

6

Pages from-to

1-6

Publisher name

Neuveden

Place of publication

neuveden

Event location

Opatia

Event date

Jul 21, 2022

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000994686900007