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Numerical simulation of vapor flow and pressure drop across the demister of MSF desalination plant

机译：无国界医生海水淡化厂除雾器中蒸气流动和压降的数值模拟

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摘要

This paper presents a numerical simulation of the water vapor flow in an MSF flash chamber along with the pressure drop across the demister. The demister is a simple porous blanket of metal wires mesh (usually made of stainless steel wires) which retains liquid droplets entrained by the vapor momentum to enhance the quality of the product water. Two main areas of concern in wire mesh mist eliminators are; (ⅰ) the pressure drop and (ⅱ) the mist removal efficiency. The present simulation focuses only on the pressure drop across the demister. The simulation is carried out considering a full scale flashing chamber of a typical operational MSF desalination plant and of a real industrial demister dimensions. The study simulates the demister as porous media flow. It takes into account the vapor velocity, the dimension of the demister, its porosity and wire thickness. The obtained pressure drop was found to be within a reasonable agreement with the published literature data and it follows a trend compatible with Ergun's equation as well as the empirical correlation of Svendsen.
机译：本文介绍了MSF闪蒸室中水蒸气流动以及除雾器两端的压降的数值模拟。除雾器是由金属丝网制成的简单多孔毯（通常由不锈钢丝制成），可保留蒸气动量夹带的液滴，从而提高产品水的质量。丝网除雾器的两个主要关注领域是： （ⅰ）压降和（ⅱ）除雾效率。本模拟仅关注除雾器上的压降。考虑典型的MSF海水淡化厂的满刻度闪蒸室和实际的工业除雾器尺寸，进行了模拟。该研究将除雾器模拟为多孔介质流动。它考虑了蒸汽速度，除雾器的尺寸，其孔隙率和金属丝厚度。发现所获得的压降与已发表的文献数据在合理的范围内，并且遵循与Ergun方程以及Svendsen的经验相关性兼容的趋势。

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  • 来源
    《Energy Conversion & Management》 |2013年第1期|793-800|共8页
  • 作者

    I. Janajreh; A. Hasania; H. Fath;

  • 作者单位

    Mechanical Engineering Program, Masdar Institute of Science and Technology, Abu Dhabi 54224, United Arab Emirates;

    Water and Environmental Engineering Program, Masdar Institute of Science and Technology, Abu Dhabi 54224, United Arab Emirates;

    Mechanical Engineering Program, Masdar Institute of Science and Technology, Abu Dhabi 54224, United Arab Emirates;

  • 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

    pressure drop; CFD; flashing chamber; desalination;

    机译：压力下降;差价合约闪蒸室;海水淡化;

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