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Modeling of shell and tube heat recovery exchanger operated with nanofluid based coolants

机译:基于纳米流体的冷却剂运行的管壳式热回收换热器的建模

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摘要

The emergence of several challenging issues such as climate change, fuel price hike and fuel security have become hot topics around the world. Therefore, introducing highly efficient devices and heat recovery systems are necessary to overcome these challenges. It is reported that a high portion of industrial energy is wasted as flue gas from heating plants, boilers, etc. This study has focused on the application of nano-fluids as working fluids in shell and tube heat recovery exchangers in a biomass heating plant. Heat exchanger specification, nanofluid properties and mathematical formulations were taken from the literature to analyze thermal and energy performance of the heat recovery system. It was observed that the convective and overall heat transfer coefficient increased with the application of nanofluids compared to ethylene glycol or water based fluids. It addition, 7.8% of the heat transfer enhancement could be achieved with the addition of 1% copper nanoparticles in ethylene glycol based fluid at a mass flow rate of 26.3 and 116.0 kg/s for flue gas and coolant, respectively.
机译:气候变化,燃油价格上涨和燃油安全等一些具有挑战性的问题的出现已成为世界范围内的热门话题。因此,必须采用高效的设备和热回收系统来克服这些挑战。据报道,工业能源的很大一部分被浪费为供热厂,锅炉等的烟道气。这项研究集中于将纳米流体作为工作流体在生物质供热厂的壳管式热交换器中的应用。从文献中获取了热交换器规格,纳米流体特性和数学公式,以分析热回收系统的热和能量性能。观察到,与乙二醇或水基流体相比,随着纳米流体的应用,对流和整体传热系数增加。此外,在烟道气和冷却剂中,分别以26.3和116.0 kg / s的质量流量在乙二醇基流体中添加1%铜纳米颗粒,可以实现7.8%的传热增强。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2012年第4期|p.808-816|共9页
  • 作者单位

    Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia,Department of Mechanical Engineering, National Defense University of Malaysia, Sg. Besi Camp, 57000 Kuala Lumpur, Malaysia;

    Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;

    Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;

    Department of Mechanical Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;

  • 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

    nanofluids; heat recovery; energy; flue gas;

    机译:纳米流体热量回收;能源;烟气;

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