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Determination of Optimum Velocity for Various Nanofluids Flowing in a Double-Pipe Heat Exchanger

机译：确定双管式换热器中各种纳米流体的最佳流速

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摘要

Piping is one of the most important issues in the cost of process factories. It is known that 80% of bought equipment cost or 20% of overhead capital can belong to piping cost in a fluid-process factory. Pipe diameter and therefore flow velocity strongly affect the existing value of the factory regarding the consumed electric energy and fitting cost of pipes, pumps, and valves. We give a detailed cost analysis model for the pure fluids of water, motor oil, glycerin, ammonia, methanol, ethanol, ethylene glycol, and propane and their nanofluid mixtures with Ti and TiO_2 particles in liquid phase flowing in the tube side of a double-pipe heat exchanger. Pressure drop and pumping power values increase with flow velocity but total cost values show an arc with it. The clear outcome is that there is a minimum cost value as a result of the analyses for each investigated fluids. Moreover, validation of the model is performed by plotting the calculated items in figures such as total heat transfer coefficient versus Reynolds number, pressure drop versus Reynolds number, and friction factor versus mass flow rate. Characteristics of the trend lines in these figures are seen as they should be.
机译：管道是过程工厂成本中最重要的问题之一。众所周知，购买的设备成本的80％或间接资本的20％可以属于流体处理工厂中的管道成本。管道直径以及因此的流速会严重影响工厂在消耗电能，管道，泵和阀门的安装成本方面的现有价值。我们给出了水，机油，甘油，氨，甲醇，乙醇，乙二醇和丙烷的纯流体及其与Ti和TiO_2颗粒液相混合在双管侧的纯流体的详细成本分析模型。 -管式热交换器。压降和泵送功率值随流速而增加，但总成本值与之成弧形。明确的结果是，对每种被调查的流体进行分析后，其成本成本最低。此外，通过绘制图中的计算项（例如总传热系数对雷诺数，压降对雷诺数以及摩擦系数对质量流率）来执行模型验证。这些图中趋势线的特征应被视为应有的特征。

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  • 来源
    《Heat Transfer Engineering》 |2017年第4期|11-25|共15页
  • 作者

    Ahmet Selim Dalkilic; Ozgen Acikgoz; Muhammed Ali Guemues; Somchai Wongwises;

  • 作者单位

    Department of Mechanical Engineering, Yildiz Technical University, Istanbul, Turkey;

    Department of Mechanical Engineering, Yildiz Technical University, Istanbul, Turkey;

    Department of Mechanical Engineering, Yildiz Technical University, Istanbul, Turkey;

    Department of Mechanical Engineering, King Mongkut's University of Technology Thonburi,Bangmod, Bangkok, Thailand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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