Limits and Use of Polymeric Hollow Fibers as Material for Heat Transfer Surfaces
Identifikátory výsledku
Kód výsledku v 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>
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Limits and Use of Polymeric Hollow Fibers as Material for Heat Transfer Surfaces
Popis výsledku v původním jazyce
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
Název v anglickém jazyce
Limits and Use of Polymeric Hollow Fibers as Material for Heat Transfer Surfaces
Popis výsledku anglicky
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
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
—
OECD FORD obor
20303 - Thermodynamics
Návaznosti výsledku
Projekt
<a href="/cs/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Centrum výzkumu nízkouhlíkových energetických technologií</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
Sborník z konference "2022 International Congress on Advanced Materials Sciences and Engineering (AMSE)"
ISBN
978-1-6654-4718-8
ISSN
—
e-ISSN
—
Počet stran výsledku
6
Strana od-do
1-6
Název nakladatele
Neuveden
Místo vydání
neuveden
Místo konání akce
Opatia
Datum konání akce
21. 7. 2022
Typ akce podle státní příslušnosti
WRD - Celosvětová akce
Kód UT WoS článku
000994686900007