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首页> 外文期刊>Energy Conversion & Management >Comparative study of a novel liquid-vapour separator incorporated gravitational loop heat pipe against the conventional gravitational straight and loop heat pipes - Part Ⅰ: Conceptual development and theoretical analyses
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Comparative study of a novel liquid-vapour separator incorporated gravitational loop heat pipe against the conventional gravitational straight and loop heat pipes - Part Ⅰ: Conceptual development and theoretical analyses

机译：装有重力环热管的新型液气分离器与常规重力直管和环热管的比较研究-第一部分：概念发展和理论分析

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摘要

Aim of the paper is to investigate the thermal performance of a novel liquid-vapour separator incorporated gravity-assisted loop heat pipe (GALHP) (T1), against a conventional GALHP (T2) and a gravitational straight heat pipe (T3), from the conceptual and theoretical aspects. This involved a dedicated conceptual formation, thermo-fluid analyses, and computer modelling and results discussion. The innovative feature of the new GALHP lies in the integration of a dedicated liquid-vapour separator on top of its evaporator section, which removes the potential entrainment between the heat pipe liquid and vapour flows and meanwhile, resolves the inherent 'dry-out' problem exhibited in the conventional GALHP. Based on this recognised novelty, a dedicated steady-state thermal model covering the mass continuity, energy conservation and Darcy equations was established. The model was operated at different sets of conditions, thus generating the temperature/pressure contours of the vapour and liquid flows at the evaporator section, the overall thermal resistance, the effective thermal conductivity, and the flow resistances across entire loop. Comparison among these results led to determination of the optimum operational settings of the new GALHP and assessment of the heat-transfer enhancement rate of the new GALHP against the conventional heat pipes. It was suggested that the overall thermal resistance of the three heat pipes (T1, T2, and T3) were 0.10 ℃/W, 0.49 ℃/W and 0.22 ℃/W, while their effective thermal conductivities were 31,365 W/℃ m, 9,648 W/℃ m and 5,042 W/℃ m, respectively. This indicated that the novel heat pipe (T1) could achieve a significantly enhanced heat transport effect, relative to T2 and T3. Compared to a typical cooper rod, T1 has around 78 times higher effective thermal conductivity, indicating that T1 has the tremendous competence compared to other heat transfer components. It should be noted that this paper only reported the theoretical outcomes of the research and the second paper would report the follow-on experimental study and model validation. The research results could be directly used for design, optimisation and analyses of the new GALHP, thus promoting its wide applications in various situations to enable the enhanced thermal performance to be achieved.
机译：本文的目的是研究新型装有重力辅助回路热管（GAL）（T1）与传统GALHP（T2）和重力直热管（T3）的液汽分离器的热性能。概念和理论方面。这涉及专门的概念形成，热流体分析，计算机建模和结果讨论。新型GALHP的创新之处在于在蒸发器部分的顶部集成了专用的液气分离器，从而消除了热管中的液体和蒸汽流之间的潜在夹带，同时解决了固有的“干透”问题在常规GALHP中展示。基于这一公认的新颖性，建立了涵盖质量连续性，能量守恒和达西方程的专用稳态热模型。该模型在不同的条件下运行，从而生成在蒸发器部分流动的蒸汽和液体的温度/压力等高线，总热阻，有效导热率以及整个回路的流阻。这些结果之间的比较导致确定了新型GALHP的最佳运行设置，并评估了新型GALHP对传统热管的传热增强率。建议三个热管（T1，T2和T3）的总热阻分别为0.10℃/ W，0.49℃/ W和0.22℃/ W，而它们的有效导热率分别为31,365 W /℃m，9,648 W /℃m和5,042 W /℃m。这表明相对于T2和T3，新型热管（T1）可以显着增强传热效果。与典型的铜杆相比，T1的有效热导率高约78倍，这表明T1与其他传热组件相比具有巨大的竞争力。应当指出的是，本文仅报告了该研究的理论成果，第二篇论文则报告了后续的实验研究和模型验证。研究结果可直接用于新型GALHP的设计，优化和分析，从而促进其在各种情况下的广泛应用，以实现增强的热性能。

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  • 来源
    《Energy Conversion & Management》 |2015年第1期|409-426|共18页
  • 作者

    Xingxing Zhang; Jingchun Shen; Wei He; Peng Xu; Xudong Zhao; Junyi Tan;

  • 作者单位

    School of Engineering, University of Hull, UK,Department of Architecture and Built Environment, University of Nottingham, Ningbo, China;

    School of Engineering, University of Hull, UK;

    School of Engineering, University of Hull, UK,Department of Thermal Science and Energy Engineering, University of Science and Technology of China, China;

    School of Engineering, University of Hull, UK,School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing, China;

    School of Engineering, University of Hull, UK;

    Zhuhai Singyes Renewable Energy Technology Co., Ltd, Guangzhou, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Gravity; Heat pipe; Composite wick; Heat transfer; Mass; Theoretical model;

    机译：重力;热管;复合灯芯;传播热量;质量理论模型;

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