Experimental study of heat transfer characteristics on condensation in the presence of NCG through thermal resistance analysis

Zhang, Keyuan; Hu, Jian; Nan, Zezhao; Chen, Zengqiao; Wang, Naihua

doi:10.1016/j.pnucene.2020.103591

Cited by 14 publications

(1 citation statement)

References 26 publications

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“…A high-speed camera (XIMEA MQ003MG-CM) was used to record the surface droplet dynamics at a frame rate of 500FPS. An H2O2 treated hydrophilic copper tube was first tested and the heat transfer coefficient was compared with a modified theoretical Nusselt model given below, taking account of the interfacial fluctuations [12].…”

Section: Condensation Visualization and Heat Transfer Experimentsmentioning

confidence: 99%

Grooved hybrid copper surfaces for condensation heat transfer.

Goswami,

Pillai,

McGranaghan

2024

J. Phys.: Conf. Ser.

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Condensation is commonly utilized in numerous thermal management applications and has two modes termed filmwise and dropwise, the latter providing superior heat transfer performance. However dropwise condensation is usually limited by its dependence on gravitational shedding of condensate. To combat this, hybrid surfaces consisting of regions of different wettability have emerged as a promising solution. Of such designs, hybrid grooved surfaces consisting of grooves with varying wettability in the groove valleys and ridge tops are of current interest. To date, most such surfaces have been silicon-based and over flat substrates. In this work, condensation experiments are performed on a copper tube with fabricated grooved hybrid surfaces. The aim is to take advantage of anisotropic wetting due to the presence of grooves and condensate drainage from higher wettability regions. The experimental results quantify the heat transfer with the degree of subcooling. At the same time, droplet dynamics were studied on the hydrophobic-hydrophilic surfaces, showing several droplet growth and departure mechanisms leading to effective heat transfer.

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Section: Condensation Visualization and Heat Transfer Experimentsmentioning

confidence: 99%