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Experimental investigations of ice slurry flow based on monoethylene glycol at high ice fractions

机译:高冰分率单乙二醇冰浆流动实验研究

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摘要

Ice slurry has so many advantages as phase-change slurries due to the high latent heat of its particles. Ice slurry is one of a competitive alternative to conventional secondary refrigeration systems that have been successfully employed in many applications. In this research, ice slurry flow with monoethylene glycol (MEG) at high ice fractions was investigated. The experiment was carried out by measuring shear stress and flow rate as variable to calculate power law index. The experiment was performed in 14 mm, 21 mm, and 24 mm circular tubes, respectively. The Initial concentration of 5 wt%, 7 wt%, and 10 wt% of MEG was investigated. Ice fraction was maintained above 30% in a storage tank. Experimental results of the Darcy friction factor were compared to Poiseuille and Blasius model. The ice slurry flows exhibited a shear-thickening flow (n>1) for all initial concentration in the range 1.07 - 1.58. The Greater initial concentration of MEG tends to give smaller friction compared with another ice slurry flow with smaller initial concentration.
机译:冰浆由于其颗粒的高潜热而具有许多优点,如相变浆。冰浆是已在许多应用中成功采用的常规二次制冷系统的竞争替代品之一。在这项研究中,研究了在高冰分数下单乙二醇(MEG)在冰浆中的流动。通过测量剪应力和流量作为变量进行实验,以计算幂律指数。实验分别在14毫米,21毫米和24毫米的圆形管中进行。研究了5重量%,7重量%和10重量%的MEG的初始浓度。在储罐中,冰分数保持在30%以上。将达西摩擦系数的实验结果与Poiseuille和Blasius模型进行了比较。对于所有初始浓度在1.07至1.58范围内的冰浆流均表现出剪切增稠流(n> 1)。与另一种初始浓度较小的冰浆流相比,MEG的较大初始浓度往往会产生较小的摩擦。

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