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Journal of Enhanced Heat Transfer
Главный редактор: Zhixiong Guo (open in a new tab)
Founding Advisory Editor: Arthur E. Bergles (open in a new tab)
Редактор-основатель: Ralph L. Webb (open in a new tab)

Выходит 8 номеров в год

ISSN Печать: 1065-5131

ISSN Онлайн: 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

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CONDENSATION HEAT TRANSFER AND PRESSURE DROP OF R-410A IN INTERNALLY ENHANCED FLAT ALUMINUM MULTI-PORT TUBES

Том 22, Выпуск 6, 2015, pp. 503-526
DOI: 10.1615/JEnhHeatTransf.2016019238
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Краткое описание

Brazed heat exchangers with aluminum multi-port tubes are being used as condensers of residential air conditioners. In this study, R-410A condensation tests were conducted in internally enhanced multi-port tubes. The enhancement consisted of grooves or micro-fins. The present grooved tube had two high micro-fins on the top and bottom of the channel, whereas the micro-finned tube had eight low micro-fins along the channel periphery. Smooth multi-port tubes of approximately the same hydraulic diameter were also tested for comparison purpose. The test range covered the mass flux from 100 to 400 kg/m2 s and the heat flux was fixed at 3 kW/m2, which are typical operating conditions of a residential air conditioner. The saturation temperature was 45° C. Heat transfer was enhanced by grooves or micro-fins, with significant amount in a micro-finned tube. The enhancement increased as mass flux decreased. The pressure drop also increased in grooved or micro-finned tubes. The pressure drop penalty decreased as mass flux decreased. The micro-fin effect on condensation heat transfer increased as vapor quality increased by exposing more fin area into vapor. The effect was more significant for micro-finned tube due to more fins. Data are compared with existing correlations.

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