Fatigue Testing of Polymeric Hollow Fibre Heat Transfer Surfaces by Pulsating Pressure Loads

Brožová, Tereza; Luks, Tomáš; Astrouski, Ilya; Raudenský, Miroslav

doi:10.4028/www.scientific.net/amm.821.3

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…Their life expectancy is dealt with in [10]. The study proves that PHFHEs with a chaotic structure are able to withstand more than one million successful pressure cycles that simulate the operating conditions.…”

Section: Introductionmentioning

confidence: 91%

The Influence of the Fibres Arrangement on Heat Transfer and Pressure Drop of Polymeric Hollow Fibre Heat Exchangers

et al. 2020

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Polymeric hollow fibre heat exchangers are the new alternative to common metal heat exchangers. These heat exchangers provide advantages, such as low weight, corrosion resistance, easy shaping and machining. Moreover, they consume less energy during their production. Therefore, they are environmentally friendly. The paper deals with shell & tube heat exchangers, which consist of hundreds of polymeric hollow fibres. The structure of the heat transfer surfaces has a significant influence on the effectivity of the use of the heat transfer area that is formed by the polymeric hollow fibres. The study gives a comparison of heat exchangers with an identical outer volume. The difference between them is in the structure of the heat transfer insert. One of the presented heat exchangers has fibres that are in-line and the second heat exchanger has staggered fibres. The study also pays attention to the difference in differential pressures caused by the difference in the structure of the heat transfer surfaces.

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Section: Introductionmentioning

confidence: 91%

The Influence of the Fibres Arrangement on Heat Transfer and Pressure Drop of Polymeric Hollow Fibre Heat Exchangers

et al. 2020

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“…Determination of the lifetime is an important factor in every device evaluation. Fatigue testing by pressure loading proved that chaotic PHFHEs are able to withstand more than one million pressure cycles (from 0 to 3.5 bar) without any sign of damage [ 46 ]. These PHFHEs are used in this study.…”

Section: Introductionmentioning

confidence: 99%

Fully Polymeric Distillation Unit Based on Polypropylene Hollow Fibers

et al. 2021

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Access to pure water is a very topical issue today. Desalination represents a promising way of obtaining drinking water in areas of shortage. Currently, efforts are being made to replace the metal components of existing desalination units due to the high corrosivity of sea water. Another requirement is easy transportation and assembly. The presented solution combines two types of polymeric hollow fibers that are used to create the distillation unit. Porous polypropylene hollow fiber membranes have been used as an active surface for mass transfer in the distillation unit, while non-porous thermal polypropylene hollow fibers have been employed in the condenser. The large active area to volume ratio of the hollow fiber module improves the efficiency of both units. Hot water is pumped inside the membranes in the distillation unit. Evaporation is first observed at a temperature gradient of 10 °C. The water vapor flows through the tunnel to the condenser where cold water runs inside the fibers. The temperature gradient causes condensation of the vapor, and the condensate is collected. The article presents data for hot water at temperatures of 55, 60, and 65 °C. Optimization of the membrane module is evaluated and presented.

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“…They can also be used effectively in heating, ventilating and air conditioning technology. 3 The service life testing of such heat exchangers is described in the study by Brozova et al 4 More information can be found in the works of Astrouski, 5 Astrouski et al 6 and Raudensky et al 7…”

Section: Introductionmentioning

confidence: 99%

Determination of surface wettability of polymeric hollow fibres

Brožová

Raudenský

2018

Journal of Elastomers & Plastics

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Surface wettability significantly affects the condensation and therefore the heat transfer when condensation occurs. The materials are classified as either hydrophobic or hydrophilic. Materials with a lower contact angle are more suitable for heat transfer applications associated with condensation. The dynamic contact angle is one way to define surface wettability. In this contribution, the Wilhelmy method was used for measuring the force of the interaction of a fibre at the liquid-gas interface. The method is based on immersing a sample in a liquid and then removing it. This study compares the influence of the type of polymeric material and surface finishes of hollow fibres on the dynamic contact angle. Polypropylene fibres and polypropylene fibres with a Trapylen ® , (TRAMACO GmbH, Germany) surface finish achieve a larger dynamic contact angle (the advancing dynamic contact angle measured in water is around 100). Therefore, they seem to be a better alternative than polycarbonate, polyether ether ketone and polyamide (the advancing dynamic contact angle in water is around 80).

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Fatigue Testing of Polymeric Hollow Fibre Heat Transfer Surfaces by Pulsating Pressure Loads

Cited by 7 publications

References 3 publications

The Influence of the Fibres Arrangement on Heat Transfer and Pressure Drop of Polymeric Hollow Fibre Heat Exchangers

The Influence of the Fibres Arrangement on Heat Transfer and Pressure Drop of Polymeric Hollow Fibre Heat Exchangers

Fully Polymeric Distillation Unit Based on Polypropylene Hollow Fibers

Determination of surface wettability of polymeric hollow fibres

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