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Journal of Flow Visualization and Image Processing

Publication de 4  numéros par an

ISSN Imprimer: 1065-3090

ISSN En ligne: 1940-4336

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.6 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.6 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00013 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.14 SJR: 0.201 SNIP: 0.313 CiteScore™:: 1.2 H-Index: 13

Indexed in

PLATE HEAT EXCHANGERS FOR OCEAN THERMAL ENERGY CONVERSION

Volume 11, Numéro 4, 2004, 17 pages
DOI: 10.1615/JFlowVisImageProc.v11.i4.30
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RÉSUMÉ

Ocean Thermal Energy Conversion (OTEC) utilizes the temperature difference between the warm surface seawater and cold deep ocean water to generate electricity. The heat exchanger in an OTEC power plant is significant as it exchanges a large quantity (nearly 40-50 times of the gross power) of heat energy due to the low thermal efficiency of the power cycle. Nearly 30-40% of the total cost of the plant should be allotted to this single component. For the present, 1-MW OTEC plant plate heat exchangers are used both as an evaporator and a condenser.
This paper reports a Computational Fluid Dynamics (CFD) investigation for a dimple plate heat exchanger. The analysis uses the Log Mean Temperature Difference Method (LMTD) in all its calculations. Whilst the shell side flow highly resembles the flow over a rough or wavy plate, the tube side passage in these represents the flow over short hexagonal tube banks with the flow across the sectional areas between the hexagons having the shape of a benzene ring. The CFD code employed is Fluent 5 using the Re-Normalization Group (RNG) turbulence model and the two-layer zonal model for near wall areas on the shell side. For tube side flow, the normal k-ε turbulence model is used with a turbulent Prandtl number of 0.63 suggested for flow in tube banks by the literature.

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