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首页> 外文期刊>Vacuum: Technology Applications & Ion Physics: The International Journal & Abstracting Service for Vacuum Science & Technology >Application and research of new energy-efficiency technology for liquid ring vacuum pump based on turbulent drag reduction theory
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Application and research of new energy-efficiency technology for liquid ring vacuum pump based on turbulent drag reduction theory

机译：基于湍流阻力的液环真空泵新能效技术的应用与研究

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摘要

The liquid ring vacuum (LRV) pump is a gas-liquid rotodynamic machine which has been widely applied for over a century in areas of gas pumping. However, its high energy consumption and low efficiency has been a dramatic limitation not effectively solved by the structural optimization design. Based on an energy balance model, a novel energy-efficiency technology for the LRV pump is proposed, which uses a polymer drag-reducing xanthan gum (XG) solution as the working fluid to reduce wall friction and turbulent loss to improve the pump efficiency. The effect of XG concentration on the rheological properties of XG solution and the LRV pump performance was investigated experimentally. The results show the XG solution shows a shear thinning and viscoelastic behavior, and at an inlet pressure of 60 kPa, the LRV pump efficiency is 34.4% in pure water, but can be greatly improved to 43.2% at an optimum concentration of 4500 ppm, corresponding to a 21.4% energy saving rate (ESR). Further, the variation of ESR with time induced by mechanical degradation is well fitted with two empirical decay equations. This technology has been industrially applied to reduce energy waste of the LRV pump, and a net energy cost saving 19.07% is achieved.
机译：液体环真空（LRV）泵是一种气液旋转式机器，在气体泵送区域中广泛应用于一个世纪。然而，它的高能耗和低效率是结构优化设计没有有效解决的巨大限制。基于能量平衡模型，提出了一种新颖的LRV泵的能效技术，它使用聚合物阻力减小的黄原胶（XG）溶液作为工作流体，以减少壁摩擦和湍流损失以提高泵效率。实验研究了XG浓度对XG溶液流变性能的影响和LRV泵性能。结果表明XG溶液显示剪切稀释和粘弹性，并且在60kPa的入口压力下，LRV泵效率为纯净水34.4％，但可以大大提高至43.2％，最佳浓度为4500ppm，对应于21.4％的节能率（ESR）。此外，通过机械劣化引起的ESR的变化很好地配备了两个经验衰减方程。该技术已经在工业上应用于减少LRV泵的能量浪费，并且达到净能源成本节省19.07％。

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