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Journal of Enhanced Heat Transfer

Publicou 8 edições por ano

ISSN Imprimir: 1065-5131

ISSN On-line: 1563-5074

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NUCLEATE POOL BOILING OF R-134A ON ENHANCED HORIZONTAL SURFACES HAVING PORES ON SUB-TUNNELS

Volume 26, Edição 3, 2019, pp. 195-216
DOI: 10.1615/JEnhHeatTransf.2019028532
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RESUMO

Enhanced surfaces having circular pores and rectangular sub-tunnels were made and nucleate boiling tests were conducted using R-134a under horizontal positions. Nine samples had pore diameters from 0.1 mm to 0.3 mm and pore pitches from 0.75 mm to 3.0 mm. The heat transfer coefficient increased as the pore size increased, at least for the investigated test range. The reason was attributed to the increased bubble departure diameter with the pore diameter. The heat transfer coefficient also increased as the pore pitch decreased, while the number of pores increased approximately in proportion to the square of pitch ratio. Increased nucleate site density at smaller pore pitch appears responsible for the high heat transfer coefficient. Existing theoretical models did not adequately predict the present data. A new model was proposed, which predicted 70% of the present data within ± 50%.

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CITADO POR
  1. Mehdi Sadaf, Shah Yousaf, Mondal Anadi, Kim Nae-Hyun, Bubble dynamics of R-134a boiling in enhanced surfaces having pores on sub-tunnels, International Journal of Heat and Mass Transfer, 155, 2020. Crossref

  2. Ashouri Mahyar, Rahmati Pouria, Hakkaki-Fard Ali, On the effect of corrugated conical frustum on pool boiling heat transfer, Experimental Thermal and Fluid Science, 130, 2022. Crossref

  3. Shah Yousaf, Kim Nae-Hyun, Pool boiling of R-123/MO and R-134a/POE lubricant mixtures on pored surfaces, Journal of Mechanical Science and Technology, 36, 1, 2022. Crossref

  4. Emir Tolga, Ourabi Hamza, Budakli Mete, Arik Mehmet, Parametric Effects on Pool Boiling Heat Transfer and Critical Heat Flux: A Critical Review, Journal of Electronic Packaging, 144, 4, 2022. Crossref

  5. Mehdi Sadaf, Nannapaneni Saideep, Hwang Gisuk, Structural-material-operational performance relationship for pool boiling on enhanced surfaces using deep neural network model, International Journal of Heat and Mass Transfer, 198, 2022. Crossref

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