POLYMERIC HOLLOW FIBERS SERVING AS A CROSS-FLOWHEAT EXCHANGER IN LIQUID-TO-GAS APPLICATIONS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F23%3APU149051" target="_blank" >RIV/00216305:26210/23:PU149051 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.dl.astfe.org/conferences/tfec2023,7731ba772c4916c1,32311fb73963759d.html" target="_blank" >https://www.dl.astfe.org/conferences/tfec2023,7731ba772c4916c1,32311fb73963759d.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1615/TFEC2023.hex.045915" target="_blank" >10.1615/TFEC2023.hex.045915</a>

Jazyk výsledku

angličtina

Název v původním jazyce

POLYMERIC HOLLOW FIBERS SERVING AS A CROSS-FLOWHEAT EXCHANGER IN LIQUID-TO-GAS APPLICATIONS

Popis výsledku v původním jazyce

Polymeric hollow fiber heat exchangers (PHFHEs) consist of hundreds of polymeric hollow fibers with an outer diameter of circa 1 mm. Even though polymers do not have outstanding thermal conductivity, PHFHEs are effective heat exchangers due to the tremendously low thickness of the fiber wall (approximately 0.1 mm). PHFHEs are heat exchangers with large packing density, i.e. they have a large heat transfer area concerning their volume. Their main advantages are 1) low weight, 2) easy machining and shaping, 3) extraordinary chemical and corrosion resistance, and 4) being more environmentally friendly than commonly used metal materials. Concretely, extruded polymer products around five times less CO2 than extruded aluminum. Presented polyamide PHFHE with 800 fibers with a length of 170 mm and an outer diameter of 1 mm was measured in an aerodynamic tunnel as a cross-flow heat exchanger. Hot water flowed inside the fibers with an inlet temperature of 50° C with a varying flow rate between 20 and 150 l·h−1. The ventilator inside the tunnel induced the airflow with various velocities (2, 4, and 6 m·s−1). The thermal performance and air pressure drop were evaluated based on experiments. Results were further compared with the conventional aluminium heat exchanger of similar size. In all cases, the thermal performance of the plastic alternative was at least 5% higher. Concretely, it varied between 340 and 1000 W. The highest value corresponds to the flow rate of 150 l·h−1 and air velocity of 6 m·s−1.

Název v anglickém jazyce

POLYMERIC HOLLOW FIBERS SERVING AS A CROSS-FLOWHEAT EXCHANGER IN LIQUID-TO-GAS APPLICATIONS

Popis výsledku anglicky

Polymeric hollow fiber heat exchangers (PHFHEs) consist of hundreds of polymeric hollow fibers with an outer diameter of circa 1 mm. Even though polymers do not have outstanding thermal conductivity, PHFHEs are effective heat exchangers due to the tremendously low thickness of the fiber wall (approximately 0.1 mm). PHFHEs are heat exchangers with large packing density, i.e. they have a large heat transfer area concerning their volume. Their main advantages are 1) low weight, 2) easy machining and shaping, 3) extraordinary chemical and corrosion resistance, and 4) being more environmentally friendly than commonly used metal materials. Concretely, extruded polymer products around five times less CO2 than extruded aluminum. Presented polyamide PHFHE with 800 fibers with a length of 170 mm and an outer diameter of 1 mm was measured in an aerodynamic tunnel as a cross-flow heat exchanger. Hot water flowed inside the fibers with an inlet temperature of 50° C with a varying flow rate between 20 and 150 l·h−1. The ventilator inside the tunnel induced the airflow with various velocities (2, 4, and 6 m·s−1). The thermal performance and air pressure drop were evaluated based on experiments. Results were further compared with the conventional aluminium heat exchanger of similar size. In all cases, the thermal performance of the plastic alternative was at least 5% higher. Concretely, it varied between 340 and 1000 W. The highest value corresponds to the flow rate of 150 l·h−1 and air velocity of 6 m·s−1.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20303 - Thermodynamics

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)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název statě ve sborníku

Sborník z konference Proceedings of the Thermal and Fluids Engineering Summer Conference

ISBN

—

ISSN

2379-1748

e-ISSN

—

Počet stran výsledku

7

Strana od-do

1473-1479

Název nakladatele

Neuveden

Místo vydání

neuveden

Místo konání akce

College Park

Datum konání akce

26. 3. 2023

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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