Analytical Model for Characterization of Loop Heat Pipes
Analytical Model for Characterization of Loop Heat Pipes
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DOI：
10.2514/1.37439
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发表时间：
2008-10
影响因子：
2.1
通讯作者：
S. Launay;V. Sartre;J. Bonjour
中科院分区：
文献类型：
--
作者：
S. Launay;V. Sartre;J. Bonjour
本文提出了将环路热管的工作温度与各种流体参数和几何参数联系起来，用于预测环路热管稳态行为的通用方程。不同回路热管operatingmodesarededucedfromtheequationsofapreviouslydevelopednumericalmodel.的闭合解这种环状热管模型的新方法有助于识别影响其运行行为的物理机制。此外，还可以估算可变电导模式和固定电导模式之间的过渡热流密度。该简化模型已在不同几何形状和运行条件下对各种环路热管运行方式进行了验证。该模型可为环路热管的设计提供有用的工具。术语A=截面面积cp=比热D=直径e=厚度f=摩擦系数g=重力加速系数h=对流换热系数Hc=凝结换热系数K=总换热系数或渗透率k=导热系数L=长度LV=汽化潜热_m=质量流量P=压力Q=传热率R=热阻Rp=孔径Re=雷诺数S=换热表面积T=温度�H=相对高度�=润湿角�=动态粘度�=密度�=表面张力下标
The present paper proposes general equations for predicting the steady-state behavior of a loop heat pipe, linking its operating temperature to various fluidic and geometrical parameters. The closed-form solutions determined for variousloop-heat-pipe operatingmodesarededucedfromtheequationsofapreviouslydevelopednumericalmodel. This new approach of the loop-heat-pipe modeling facilitates the identification of the physical mechanisms that influence its operating behavior. In addition, the transition heat flux between variable and fixed conductance modes can also be estimated. This simplified model has been validated for each loop-heat-pipe operating mode for various geometries and operating conditions. The present model could be a useful tool for the design of loop heat pipes. Nomenclature A = cross-sectional area cp = specific heat D = diameter e = thickness f = friction factor g = gravitational acceleration h = convective heat transfer coefficient hC = condensation heat transfer coefficient K = overall heat transfer coefficient or permeability k = thermal conductivity L = length lv = latent heat of vaporization _ m = mass flow rate P = pressure Q = heat transfer rate R = thermal resistance Rp = pore radius Re = Reynolds number S = heat exchange surface area T = temperature � H = relative elevation � = wetting angle � = dynamic viscosity � = density � = surface tension Subscripts