About: Theoretical Explanation of Pressure and Holdup Overshoots in Countercurrent Packed Columns

Facets (new session)
Description
Metadata
Settings
- owl:sameAs
- Inference Rule:

About: Theoretical Explanation of Pressure and Holdup Overshoots in Countercurrent Packed Columns Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	This paper presents a mathematical model of the transient behavior of the hydrodynamics of a countercurrent packed bed column. The model has been solved numerically for the conditions representing a step increase of either gas or liquid inlet velocity. The obtained profiles exhibit overshoots of pressure drop and liquid holdup for conditions when the step change brings the system into the region where liquid holdup is a strong function of also gas velocity. This fully confirms our previous experimental observation. Our results show that the overshoots appear due to the formation of new liquid holdup profile that temporarily lowers liquid velocity in the lower parts of the bed while it temporarily increases the gas velocity in the upper parts of the bed. Reasonable agreement was found between the predicted and experimental transient profiles of pressure drop and liquid holdup exhibiting overshoots. This paper presents a mathematical model of the transient behavior of the hydrodynamics of a countercurrent packed bed column. The model has been solved numerically for the conditions representing a step increase of either gas or liquid inlet velocity. The obtained profiles exhibit overshoots of pressure drop and liquid holdup for conditions when the step change brings the system into the region where liquid holdup is a strong function of also gas velocity. This fully confirms our previous experimental observation. Our results show that the overshoots appear due to the formation of new liquid holdup profile that temporarily lowers liquid velocity in the lower parts of the bed while it temporarily increases the gas velocity in the upper parts of the bed. Reasonable agreement was found between the predicted and experimental transient profiles of pressure drop and liquid holdup exhibiting overshoots. (en) V článku je presentován matematický model přechodového chování protiproudé náplňové kolony. Model byl řešen numericky pro skokové zvýšení vstupního průtoku plynu nebo kapaliny. Získané profily vykazují překmity tlakové ztráty a zádrže kapaliny za podmínky, kdy se systém nachází v oblasti silné interakce toku fází. To zcela souhlasí s experimentálními měřeními. Naše výssledky ukazují, že překmity se tvoří v důsledku profilu nové zádrže kapaliny, který přechodně snižuje rychlost kapaliny ve spodní části náplně zatímco se přechodně zvyšuje rychlost plynu v horní části náplně. Porovnání s experimentem ukazuje přijatelnou schodu s výpočty. (cs)
Title	Theoretical Explanation of Pressure and Holdup Overshoots in Countercurrent Packed Columns Teoretické vysvětlení překmitu tlaku a zádrže v protiproufdé náplňové koloně (cs) Theoretical Explanation of Pressure and Holdup Overshoots in Countercurrent Packed Columns (en)
skos:prefLabel	Theoretical Explanation of Pressure and Holdup Overshoots in Countercurrent Packed Columns Teoretické vysvětlení překmitu tlaku a zádrže v protiproufdé náplňové koloně (cs) Theoretical Explanation of Pressure and Holdup Overshoots in Countercurrent Packed Columns (en)
skos:notation	RIV/67985858:_____/04:00105055!RIV/2005/GA0/A27005/N
http://linked.open.../vavai/riv/strany	8317;8322
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA104/03/1558), Z(AV0Z4072921)
http://linked.open...iv/cisloPeriodika	26
http://linked.open...vai/riv/dodaniDat	2005
http://linked.open...aciTvurceVysledku	Svoboda, Petr Staněk, Vladimír
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	590161
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/04:00105055
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	counter-current packed bed;overshoot;mathematical model (en)
http://linked.open.../riv/klicoveSlovo	mathematical model overshoot counter-current packed bed
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[06DAC15C9EA9]
http://linked.open...i/riv/nazevZdroje	Industrial & Engineering Chemistry Research
http://linked.open...in/vavai/riv/obor	CI
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Operation of counter-current columns in a dynamic state with periodic excursions beyond flooding point
http://linked.open...UplatneniVysledku	2004
http://linked.open...v/svazekPeriodika	43
http://linked.open...iv/tvurceVysledku	Svoboda, Petr Staněk, Vladimír
http://linked.open...n/vavai/riv/zamer	Theoretical fundamentals of chemical processes: equilibrium and dynamic behavior of multiphase reacting systems
issn	0888-5885
number of pages	6 (xsd:int)

Faceted Search & Find service v1.16.118 as of Jun 21 2024

Alternative Linked Data Documents: ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 07.20.3240 as of Jun 21 2024, on Linux (x86_64-pc-linux-gnu), Single-Server Edition (126 GB total memory, 85 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software