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Journal of Enhanced Heat Transfer

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ISSN Druckformat: 1065-5131

ISSN Online: 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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Effect of Hydraulic Diameter on Condensation of R-134A in Flat, Extruded Aluminum Tubes

Volumen 8, Ausgabe 2, 2001, pp. 77-90
DOI: 10.1615/JEnhHeatTransf.v8.i2.20
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ABSTRAKT

This paper addresses the effect of hydraulic diameter on single-phase and condensation heat transfer and pressure gradient for R-I34a in multi-port flat extruded aluminum tubes. The hydraulic diameter range of the four tubes tested is between 0.44 and 1.56 mm. This work is believed to provide condensation data on the smallest hydraulic diameters reported in the literature. The modified Wilson plot method was used to determine the heat transfer coefficient for water-side flow in the annulus. The data span 300−1000kg/m2-s mass velocity and approximately 15-to-90% vapor qualities. The condensation coefficient and pressure gradient increases with decreasing hydraulic diameter for all tubes. The effect of hydraulic diameter on condenser design and operation is also discussed. The ability of existing correlations to predict the single-phase and condensation coefficients are evaluated.

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