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Journal of Enhanced Heat Transfer
Founding Advisory Editor: Arthur E. Bergles (open in a new tab)

Published 8 issues per year

ISSN Print: 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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Experimental Investigation of Enhancement of Dropwise Condensation Heat Transfer of Steam-Air Mixture: Falling Droplet Effect

Volume 14, Issue 4, 2007, pp. 295-305
DOI: 10.1615/JEnhHeatTransf.v14.i4.30
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Xuehu Ma
State Key Laboratory of Fine Chemicals, Frontier Science Center for Smart Materials, Liaoning Key Laboratory Clean Utilization of Chemical Resources, Dalian University of Technology, Dalian 116024, China
Xing-Dong Zhou
Institute of Chemical Engineering, Dalian University of Technology, Dalian 116012 China
Zhong Lan
Institute of Chemical Engineering, Liaoning Key Laboratory of Clean Utilization of Chemical Resources, Dalian University of Technology, Dalian, China
Tian-Yi Song
Institute of Chemical Engineering, Dalian University of Technology, Dalian 116012 China
Jun Ji
Institute of Engineering Thermophysics, Chinese Academy of Science, Beijing 100080, China

ABSTRACT

The presence of noncondensable gas (NCG) in dropwise condensation (DWC) makes a heat transfer mechanism different; in order to get a better understanding of the enhancement mechanism in dropwise condensation with noncondensable gas, the experiments on dropwise condensation, filmwise condensation (FWC), and dropwise-filmwise coexisting condensation (DFC) heat transfer with and without noncondensable gas were performed on specially designed vertical plates. The investigations were concerned with the dynamic behavior of the liquid condensate near the vapor-liquid interface. The experimental results indicated that the heat transfer characteristics of dropwise condensation of pure steam without noncondensable gas were similar to those of the dropwise-filmwise coexisting condensation surface. However, in the presence of noncondensable gas, without the effect of droplets falling onto the vapor-liquid interface, the heat transfer characteristics of the dropwise-filmwise coexisting condensation surface were parallel to those of the filmwise condensation surface, and indeed almost no heat transfer enhancement was found. Compared with the former two condensation modes, the heat-transfer coefficient of dropwise condensation with noncondensable gas was enhanced by 30−80% for the air mole concentration of 0.9% and 4.8%, respectively. The facts cannot be attributed to the effects of reduction of the thermal resistance of the condensate layer and changes in the shape of the condensation surface, which were mainly due to the departure behavior of the condensing droplets, but make a considerable contribution to the overall heat and mass transfer performance.

CITED BY

  1. Ma Xuehu, Wang Sifang, Lan Zhong, Peng Benli, Ma H. B., Cheng P., Wetting Mode Evolution of Steam Dropwise Condensation on Superhydrophobic Surface in the Presence of Noncondensable Gas, Journal of Heat Transfer, 134, 2, 2012. Crossref

  2. Grooten M.H.M., van der Geld C.W.M., Dropwise condensation from flowing air–steam mixtures: Diffusion resistance assessed by controlled drainage, International Journal of Heat and Mass Transfer, 54, 21-22, 2011. Crossref

  3. Peng Benli, Wang Sifang, Lan Zhong, Xu Wei, Wen Rongfu, Ma Xuehu, Analysis of droplet jumping phenomenon with lattice Boltzmann simulation of droplet coalescence, Applied Physics Letters, 102, 15, 2013. Crossref

  4. Huang Ding-Jun, Leu Tzong-Shyng, Condensation heat transfer enhancement by surface modification on a monolithic copper heat sink, Applied Thermal Engineering, 75, 2015. Crossref

  5. Peng Benli, Ma Xuehu, Lan Zhong, Xu Wei, Wen Rongfu, Analysis of condensation heat transfer enhancement with dropwise-filmwise hybrid surface: Droplet sizes effect, International Journal of Heat and Mass Transfer, 77, 2014. Crossref

  6. Peng Benli, Ma Xuehu, Lan Zhong, Xu Wei, Wen Rongfu, Experimental investigation on steam condensation heat transfer enhancement with vertically patterned hydrophobic–hydrophilic hybrid surfaces, International Journal of Heat and Mass Transfer, 83, 2015. Crossref

  7. Hu H.W., Tang G.H., Niu D., Experimental investigation of condensation heat transfer on hybrid wettability finned tube with large amount of noncondensable gas, International Journal of Heat and Mass Transfer, 85, 2015. Crossref

  8. Peng Benli, Lan Zhong, Xu Wei, Wen Rongfu, Ma Xuehu, Ma Jiaxuan, Li Chen, A numerical study of droplet motion/departure on condensation of mixture vapor using lattice Boltzmann method, International Journal of Heat and Fluid Flow, 68, 2017. Crossref

  9. Yang Kai-Shing, Lin Kai-Hsiang, Tu Cheng-Wei, He Yu-Zhen, Wang Chi-Chuan, Experimental investigation of moist air condensation on hydrophilic, hydrophobic, superhydrophilic, and hybrid hydrophobic-hydrophilic surfaces, International Journal of Heat and Mass Transfer, 115, 2017. Crossref

  10. Wen Rongfu, Zhou Xingdong, Peng Benli, Lan Zhong, Yang Ronggui, Ma Xuehu, Falling-droplet-enhanced filmwise condensation in the presence of non-condensable gas, International Journal of Heat and Mass Transfer, 140, 2019. Crossref

  11. Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Mass Transfer in the Gas Phase, in Electric Fields, Additives and Simultaneous Heat and Mass Transfer in Heat Transfer Enhancement, 2020. Crossref

  12. Wen Rongfu, Lan Zhong, Peng Benli, Xu Wei, Ma Xuehu, Cheng Yaqi, Droplet Departure Characteristics and Dropwise Condensation Heat Transfer at Low Steam Pressure, Journal of Heat Transfer, 138, 7, 2016. Crossref

  13. Gu Yuheng, Ding Yudong, Liao Qiang, Fu Qian, Zhu Xun, Wang Hong, Condensation heat transfer characteristics of moist air outside 3-D finned tubes with different wettability, Energy, 207, 2020. Crossref

  14. Budakli Mete, Salem Thamer Khalif, Arik Mehmet, Donmez Barca, Menceloglu Yusuf, Effect of Polymer Coating on Vapor Condensation Heat Transfer, Journal of Heat Transfer, 142, 4, 2020. Crossref

  15. 朱 龙潜, The Application of Superhydrophilic and Superhydrophobic Composite Coating Surfaces on the Condenser of a Window Air Conditioner, Applied Physics, 10, 08, 2020. Crossref

  16. Liao Ming-Jun, Duan Li-Qiang, Investigation of Coalescence-Induced Droplet Jumping on Mixed-Wettability Superhydrophobic Surfaces, Processes, 9, 1, 2021. Crossref

  17. Ghosh Aritra, Beaini Sara, Zhang Bong June, Ganguly Ranjan, Megaridis Constantine M., Enhancing Dropwise Condensation through Bioinspired Wettability Patterning, Langmuir, 30, 43, 2014. Crossref

  18. Alhashem Abdulwahab, Khan Jamil, Heat Transfer Analysis for Dropwise-Filmwise Hybrid Surface of Steam on Vertical Plate, Journal of Thermal Science, 30, 3, 2021. Crossref

  19. Zhang Tian-Yu, Mou Lin-Wei, Liu Min-Jie, Fan Li-Wu, Advances in modeling investigations of multimode dropwise condensation heat transfer on smooth and textured surfaces – A review, International Journal of Thermal Sciences, 172, 2022. Crossref

  20. Mudhafar Mudhafar A. H., Pan Hsuan-Yi, Optimization of Condensation Heat Transfer on enhanced and integral fin tubes by Functionalized-Graphene Layers, Heat and Mass Transfer, 2022. Crossref

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