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Influence of the Flow Direction on the Mass Transport of Vapors through Membranes Consisting of Several Layers

SYSNO ASEP	0445186
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Influence of the Flow Direction on the Mass Transport of Vapors through Membranes Consisting of Several Layers
Author(s)	Loimer, T. (AT) Uchytil, Petr (UCHP-M)_{RID, SAI}
Source Title	Experimental Thermal and Fluid Science. - : Elsevier - ISSN 0894-1777 Roč. 67, OCT 2015 (2015), s. 2-5
Number of pages	4 s.
Action	International conference on Heat Transfer and Fluid Flow in Microscale (HTFFM-V) /5./
Event date	22.04.2014 - 25.04.2014
VEvent location	Marseilles
Country	FR - France
Event type	EUR
Language	eng - English
Country	US - United States
Keywords	porous media ; phase change ; vapor flow
Subject RIV	CI - Industrial Chemistry, Chemical Engineering
R&D Projects	7AMB12AT010 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
	7AMB14AT011 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	UCHP-M - RVO:67985858
UT WOS	000357223800002
EID SCOPUS	84922184538
DOI	10.1016/j.expthermflusci.2014.12.012
Annotation	The flow of vapors with possible condensation is described, taking into account the energy balance, the Joule-Thomson effect and possible capillary condensation. For vapors close to saturation, the mass flux may be several times larger in one flow direction than in the opposite flow direction through an asymmetric membrane. As an example, the flow of isobutane through a porous ceramic membrane consisting of three different layers is theoretically investigated. The individual layers have different thicknesses with pore sizes of 10 nm for the separation layer, 100 nm for the middle layer and 6 μ m for the support layer. For a small ratio of the upstream pressure to the saturation pressure, the fluid does not condense within the porous membrane, and the mass flux is a few percent larger for the flow direction from the support to the separation layer than for the other flow direction. For larger upstream pressures, the fluid may condense and the mass flow can become about 7 times larger for one flow direction than for the opposite flow direction.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2016

Number of the records: 1