Results 21 to 30 of about 9,074 (225)

Investigation and Modelling of Cylindrical Dividing Headers

Chemical Engineering Transactions, 2022
Flow maldistribution in tubular heat exchangers may cause severe thermal and mechanical operating problems. In this view, the crucial part of a distribution system is the inlet header.
Dominika Babicka Fialová, Zdenek Jegla
doaj   +1 more source

Expanded microchannel heat exchanger: design, fabrication and preliminary experimental test [PDF]

, 2012
This paper first reviews non-traditional heat exchanger geometry, laser welding, practical issues with microchannel heat exchangers, and high effectiveness heat exchangers.
Brandemuehl, Michael J., Denkenberger, David C., Pearce, Joshua M., Zhai, John   +3 more
core   +5 more sources

Numerical Study on Novel Design for Compact Parallel-Flow Heat Exchanger with Manifolds to Improve Flow Characteristics

Energies, 2020
Parallel flow heat exchangers with manifolds are widely used in various industries owing to their compact size and ease of application. Research has been conducted to understand their flow characteristics and improve flow distribution and pressure drop ...
Byunghui Kim, Kuisoon Kim, Seokho Kim
doaj   +1 more source

A comparison of steady, pulsating flow measurements and CFD simulations in close coupled catalysts [PDF]

, 2001
Performance improvements of automotive catalytic converters can be achieved by improving the flow distribution of exhaust gases within the substrate. The flow distribution is often assumed to be adequately described by measurements obtained from steady ...
Arias-García, A., Benjamin, Stephen F., Farr, S., Zhao, H.   +3 more
core   +1 more source

Pellet heat transfer coefficients in packed beds: global and local values [PDF]

, 1993
Pellet heat transfer coefficients in a packed bed have been obtained, both for specific individual pellets and for the entire bed. They are referred to as local and global values, respectively.
Fedoseev, Gnielinski, Gnielinski, Gunn, Kunii, Martin, Nelson, Ranz, Wijngaarden, Wijngaarden, Yagi   +10 more
core   +3 more sources

Analysis, Quantitative Estimates and Methods for Reducing of the Maldistribution Created from Gas Distribution Devices for Column Apparatuses

Chemical Engineering Transactions, 2013
Providing of good initial radial distribution of gas phase is of significant importance for efficiency of column apparatuses. The aim of the present work is to analyze and evaluate gas flow maldistribution in different types of gas distributing devices ...
T. Petrova, S. Darakchiev, N. Vaklieva-Bancheva, R. Popov   +3 more
doaj   +1 more source

Numerical investigation on maldistribution of S-CO2 flow inside PCHE under rolling conditions

Energy Reports, 2023
Heat exchangers with mini-channels, such as the printed circuit heat exchanger (PCHE), are key components for supercritical carbon dioxide (S-CO2) Brayton cycle due to advantages in compactness and structural rigidity.
Qi Xiao, Xufeng Zhao, Zhenhai Zou, Yuan Yuan, Weijian Lv, Kai Chen   +5 more
doaj   +1 more source

Optimal design of multi-channel microreactor for uniform residence time distribution [PDF]

, 2010
Multi-channel microreactors can be used for various applications that require chemical or electrochemical reactions in either liquid, gaseous or multi phase.
A Ziogas, C Aubert, Cyril Renault, DG Vlachos, ER Delsman, ES Cho, GL Morini, GL Morini, H Löwe, J Pitakarnnop, J-Y Jang, JM Commenge, JM Commenge, K Koura, M Bahrami, M Saber, M Saber, P Gravesen, Patrick Cognet, RB Peterson, RG Deissler, RK Shah, S Colin, S Colin, S Shoji, SG Kandlikar, Stéphane Colin, Stéphane Orieux, Théo Tzédakis, Y Chen   +29 more
core   +3 more sources

Thermal analysis of a commercial plate fin heat exchanger with non-uniform inlet flow conditions [PDF]

, 2016
In studies using computational fluid dynamics software, very often a uniform air stream is applied as inlet boundary condition of a heat exchanger. In actual applications, however, the inlet flow conditions are not uniform.
Ameel, BerndTW080020052248208020008623260000-0002-1904-507904A1A7FE-F0EE-11E1-A9DE-61C894A0A6B4, De Kerpel, KathleenUGent0020050229388020008300919761694158240C6ADD02-F0EE-11E1-A9DE-61C894A0A6B4, De Paepe, MichelTW088010010090590000-0003-0233-0719F4E40EEC-F0ED-11E1-A9DE-61C894A0A6B4, De Schampheleire, SvenUZGent0000600928138020010399569768794124750000-0002-9215-154801B0D182-F0EE-11E1-A9DE-61C894A0A6B4, Huisseune, HenkUGent002002262983802000228085972571006319F95C7086-F0ED-11E1-A9DE-61C894A0A6B4, J. Ghajar, Afshineditor   +5 more
core   +2 more sources

Transient numerical fluid analysis on gas distribution to anode cells of a fuel cell stack under start-up condition

Nihon Kikai Gakkai ronbunshu, 2015
Catalyst degradation on both the anode and cathode sides is one of the most critical problems caused by lack of hydrogen in each channel in the active area of a polymer electrolyte fuel cell.
Yasushi ICHIKAWA, Nobuyuki OSHIMA, Yuichiro TABUCHI   +2 more
doaj   +1 more source