Convective boiling of R-134a on enhanced-tube bundles

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dc.contributor.author Gorgy, Evraam
dc.contributor.author Eckels, Steven J.
dc.date.accessioned 2018-12-10T17:48:04Z
dc.date.available 2018-12-10T17:48:04Z
dc.date.issued 2016
dc.identifier.uri http://hdl.handle.net/2097/39382
dc.description Citation: Gorgy, E., & Eckels, S. (2016). Convective boiling of R-134a on enhanced-tube bundles. International Journal of Refrigeration, 68, 145–160. https://doi.org/10.1016/j.ijrefrig.2016.04.010
dc.description.abstract The current paper presents the experimental investigation of the heat transfer performance and effect of tube pitch on highly enhanced surface tube bundles. The fluid–tube combination used was R-134a and the enhanced tube TBIIHP. Three pitch-to-diameter ratios were studied: 1.167, 1.33, and 1.5; all with a staggered triangle arrangement. Twenty enhanced tubes were used in each bundle; the tube outer diameter and length are 19.05 mm (3/4 inch) and 1 m (39.36 inch), respectively. Three input variables were investigated: heat flux (5–60 kW/m2), mass flux (15–55 kg/m2.s), and quality (10–70%). The test saturation temperature was 4.44 °C. A local method employing the EBHT technique was implemented in data reduction. All tube bundles showed strong dependency on heat flux. The smallest P/D bundle showed a considerably lower performance than the other two. When compared to the pool boiling performance, the smallest P/D bundle was lower while the other two showed a closer performance. The P/D 1.33 bundle outperforms P/D 1.167 bundle and provide quite similar performance to the P/D 1.5. When considering the refrigerant quantity, the P/D 1.5 bundle uses more refrigerant compared to the P/D 1.33; the latter proves to be the optimum. Finally, a new enhanced tube heat transfer coefficient bundle model was proposed based on the extensive data collected and the studied bundle phenomena.
dc.relation.uri https://doi.org/10.1016/j.ijrefrig.2016.04.010
dc.rights This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
dc.rights.uri http://rightsstatements.org/vocab/InC/1.0/
dc.rights.uri https://www.elsevier.com/about/policies/sharing
dc.subject Bundle void fraction
dc.subject Boiling heat transfer
dc.subject Convective boiling
dc.subject EBHT analysis
dc.subject Enhanced tubes
dc.subject Tube bundle prediction
dc.title Convective boiling of R-134a on enhanced-tube bundles
dc.title.alternative Ébullition convective du R-134a sur des faisceaux de tubes améliorés
dc.type Text
dc.date.published 2016
dc.citation.doi 10.1016/j.ijrefrig.2016.04.010
dc.citation.epage 160
dc.citation.issn 0140-7007
dc.citation.jtitle International Journal of Refrigeration
dc.citation.spage 145
dc.citation.volume 68
dc.citation Gorgy, E., & Eckels, S. (2016). Convective boiling of R-134a on enhanced-tube bundles. International Journal of Refrigeration, 68, 145–160. https://doi.org/10.1016/j.ijrefrig.2016.04.010
dc.description.version Article: Submitted Manuscript


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This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). Except where otherwise noted, the use of this item is bound by the following: This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

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