Print Email Facebook Twitter Two-phase vertical downward flow in plate heat exchangers Title Two-phase vertical downward flow in plate heat exchangers: Flow patterns and condensation mechanisms Author Toa, X. (TU Delft Engineering Thermodynamics) Nuijten, Menno P. Infante Ferreira, C.A. (TU Delft Engineering Thermodynamics) Date 2018 Abstract This study presents a literature review of work related to the two-phase flow patterns of vertical downward flow in plate heat exchangers with corrugated chevron plates. An understanding of these flow patterns is crucial for developing accurate models of plate heat exchangers functioning as condensers or absorbers. Flow pattern maps of the previous studies are combined and translated to dimensionless forms. One of the proposed flow pattern maps is based on ReL versus FrTP,hor/Λ0.5 and performs better than other representations. This map is compared with the map of tubes and shows general agreements in terms of the pattern positions, but the separating lines between flow patterns fit poorly. Influencing factors of condensation mechanisms are presented, among which mass flux and vapor quality are dominant. The preferred flow pattern map explains the transition of condensation mechanisms qualitatively when variations of mass flux and vapor quality are considered. Recommendations are given to come to more uniform flow pattern maps in plate heat exchangers with chevron corrugations. Subject Condensation mechanismsFlow patternsFlow visualizationPlate heat exchangersTwo-phase flowVertical downward flow To reference this document use: http://resolver.tudelft.nl/uuid:dbe5c502-99e2-4f5f-b110-c91b2b404e78 DOI https://doi.org/10.1016/j.ijrefrig.2017.10.008 Embargo date 2019-12-08 ISSN 0140-7007 Source International Journal of Refrigeration, 85, 489-510 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2018 X. Toa, Menno P. Nuijten, C.A. Infante Ferreira Files PDF Two_phase_vertical_downwa ... angers.pdf 1.98 MB Close viewer /islandora/object/uuid:dbe5c502-99e2-4f5f-b110-c91b2b404e78/datastream/OBJ/view