CIESC Journal ›› 2014, Vol. 65 ›› Issue (2): 628-632.DOI: 10.3969/j.issn.0438-1157.2014.02.037

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Effects of surface deposition on quenching boiling of aqueous suspension with graphene oxide nanosheets

DONG Feiying1, LI Danyang1, ZHANG Liang1, FAN Liwu1, XU Xu2, YU Zitao1, HU Yacai1   

  1. 1 Institute of Thermal Science and Power Systems, Zhejiang University, Hangzhou 310027, Zhejiang, China;
    2 College of Metrological and Measurement Engineering, China Jiliang University, Hangzhou 310018, Zhejiang, China
  • Received:2013-04-21 Revised:2013-05-21 Online:2014-02-05 Published:2014-02-05
  • Supported by:

    supported by the National Natural Science Foundation of China (51206142, 51106144) and the China Postdoctoral Science Foundation (2012M511362, 2013T60589).

表面沉积对氧化石墨烯水悬浮液淬火沸腾特性的影响

董飞英1, 李旦洋1, 张良1, 范利武1, 徐旭2, 俞自涛1, 胡亚才1   

  1. 1 浙江大学热工与动力系统研究所, 浙江 杭州 310027;
    2 中国计量学院计量测试工程学院, 浙江 杭州 310018
  • 通讯作者: 范利武
  • 基金资助:

    国家自然科学基金项目(51206142,51106144);中国博士后科学基金项目(2012M511362,2013T60589)。

Abstract: The transient boiling of an aqueous suspension with graphene oxide nanosheets (GONs), at a mass fraction of 0.002%, was characterized using the quenching method. The effects of GONs deposited on the boiling surface were compared among three representative cases. With the deposition of GONs during the transition boiling phase, the quenching period of the suspension was shortened by 10 s as compared to that of deionized water, while the critical heat flux (CHF) was improved by 10% and the contact angle was reduced from 104° to 78°. After subsequent quenching of the boiling surface with GON deposition in deionized water, the contact angle was increased to 89° and the CHF was somewhat deteriorated. It was concluded that the enhancement of CHF is primarily resulted from surface deposition of GONs. The quenching speed and the heat transfer rate during the transition boiling phase are also affected by the dynamic deposition process and the suspended GONs.

Key words: graphene oxide nanosheets, aqueous suspensions, quenching boiling, critical heat flux, surface deposition

摘要: 采用淬火法对质量分数为0.002%的氧化石墨烯水悬浮液的瞬态沸腾特性进行了表征。通过对三种代表性工况的对比分析研究了氧化石墨烯在沸腾表面的沉积对淬火沸腾过程的影响。由于氧化石墨烯在过渡沸腾阶段的沉积,水悬浮液的淬火过程较之去离子水缩短了约10 s,临界热通量则提升了约10%,对应的表面接触角从104°减小到78°。将已沉积表面再次在去离子水中淬火后,表面接触角回升到89°,临界热通量则有所回落。结果表明,氧化石墨烯的表面沉积虽然是强化临界热通量的决定性因素,但淬火过程的速率和过渡沸腾阶段的传热速率还受到氧化石墨烯的动态沉积过程和水悬浮液中悬浮氧化石墨烯的共同影响。

关键词: 氧化石墨烯, 水悬浮液, 淬火沸腾, 临界热通量, 表面沉积

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