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Journal of Enhanced Heat Transfer

Publicou 8 edições por ano

ISSN Imprimir: 1065-5131

ISSN On-line: 1563-5074

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: 2.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 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: 0.2 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: 0.00037 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: 0.6 SJR: 0.433 SNIP: 0.593 CiteScore™:: 4.3 H-Index: 35

Indexed in

HIGH-PERFORMANCE HEAT SINKS UTILIZING TWO-PHASE FLOW IN STACKED MINICHANNELS

Volume 21, Edição 6, 2014, pp. 463-485
DOI: 10.1615/JEnhHeatTransf.2015013423
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RESUMO

A common approach for heat sinks designed for cooling of electronics is to use multiple parallel coolant channels etched or machined in metal, silicon, or other materials. In order to enhance the surface area in the same planform or footprint area as a heat sink with multiple parallel channels, an alternative approach investigated in this paper is to stack multiple layers of parallel channels to create multilayer heat sinks where the layers of channels are connected to common inlet and exit flow manifolds. Because heat is supplied only on one surface of the heat sink, the heat flux in each subsequent layer of channels will be different from the others due to conduction resistance. In two-phase flow, the flow resistance is dependent on the heat flux, therefore causing the mass flow rate to also differ in each layer. Thus, even with enhanced surface area, it is not known a priori whether multilayer heat sinks are advantageous when operating with two-phase flow. The thermal and hydraulic characteristics of single-layer and multilayer copper heat sinks operating in two-phase flow with water were compared in this study. A systematic approach was taken in validating and choosing the best boiling correlations for modeling the heat sinks. The experiments showed that the multilayer copper heat sinks had lower thermal resistance and much lower pressure drop than their single-layer counterparts at low to moderate heat flux. At high heat fluxes, the two-layer heat sinks exhibited instances of unstable behavior and it is hypothesized that this is due to flow bypass that deprives the hot channel of flow, thereby leading to dry-out. With more than two channels, the enhanced surface area offsets the lack of flow in the hot channel, thus reducing its heat flux and reducing the risk of a critical event.

CITADO POR
  1. Valenzuela Felipe, Ortega Alfonso, A Novel Heat Exchanger Effectiveness Approach for Exploring Performance Limits of Two-Phase Mini-Channel Boilers, 2020 19th IEEE Intersociety Conference on Thermal and Thermomechanical Phenomena in Electronic Systems (ITherm), 2020. Crossref

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