Shell-and-tube polymeric hollow fiber heat exchangers with parallel and crossed fibers

Bartuli, Erik; Kůdelová, Tereza; Raudenský, Miroslav

doi:10.1016/j.applthermaleng.2020.116001

Cited by 13 publications

(1 citation statement)

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“…Separation of the fibers is necessary to guarantee high efficiency [ 41 ]. The importance of the fiber arrangement is highlighted in [ 42 , 43 ], where the authors claim that tilted fibers forming an angle of 22.5° across the layers, which results in an overall increase of 12.5% in the heat transfer coefficient in comparison to the parallel fibers.…”

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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Section: Introductionmentioning

confidence: 99%