Chemical Industry and Engineering Progress ›› 2023, Vol. 42 ›› Issue (5): 2315-2324.DOI: 10.16085/j.issn.1000-6613.2022-1222

• Chemical processes and equipment • Previous Articles     Next Articles

Analysis of convective heat transfer and thermo-economic performance of Al2O3-CuO/water hybrid nanofluids

GUO Wenjie(), ZHAI Yuling(), CHEN Wenzhe, SHEN Xin, XING Ming   

  1. Engineering Research Center of Metallurgical Energy Conversion and Emission Reduction, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, Yunnan, China
  • Received:2022-06-29 Revised:2022-08-22 Online:2023-06-02 Published:2023-05-10
  • Contact: ZHAI Yuling

Al2O3-CuO/水混合纳米流体对流传热性能及热经济性分析

郭文杰(), 翟玉玲(), 陈文哲, 申鑫, 邢明   

  1. 昆明理工大学冶金节能减排教育部工程研究中心,云南 昆明 650093
  • 通讯作者: 翟玉玲
  • 作者简介:郭文杰(1996—),男,硕士研究生,研究方向为中低温余热高效利用。E-mail: gwj19961208@126.com
  • 基金资助:
    国家自然科学基金(52266002);云南省基础研究项目(202001AT070081)

Abstract:

To investigate the single-phase heat transfer performance of hybrid nanofluid in a tube, the flow and heat transfer characteristics of Al2O3-CuO/water (W) hybrid nanofluid and its corresponding mono nanofluid were comparatively investigated under Reynold number of 1040—7086 and volume fraction of 0.02%, respectively. The results indicated that the addition of particles led to the advancement of Reynolds number range in the transition zone. Compared with deionized water, the maximum Nu enhancement of Al2O3/W and Al2O3-CuO/W nanofluids was 32.09% and 38.38% under laminar region (1040<Re<1891), respectively, however, the heat transfer performance of CuO/W nanofluids was worse than that of water. The reason was that the forward driving force of CuO/W nanofluid was not sufficient to overcome the self-weight and it was easy to deposit on the inner wall of the tube. In the turbulent flow region (4073<Re<7806), the heat transfer performance of all studied nanofluids was more remarkable than that of water in the combination of strong forward driving force and the rotation of fluid molecules themselves. The Al2O3-CuO/W hybrid nanofluids had the optimum heat transfer performance under turbulent flow region. Considering the comprehensive heat transfer performance and economic factor, the most suitable nanofluids were Al2O3/W and Al2O3-CuO/W nanofluids for practical application under the laminar and turbulent flow regions, respectively.

Key words: hybrid nanofluid, heat conduction, nanoparticles, convection, flow and heat transfer performance, enhanced heat transfer factor, thermo-economic analysis

摘要:

为了探究管内混合纳米流体单相对流传热性能,实验对比研究了雷诺数为1040~7086范围内体积分数为0.02%的Al2O3-CuO/水(W)混合纳米流体及其相应的一元纳米流体的流动与传热特性。结果表明,纳米颗粒的添加导致在过渡区雷诺数范围提前,在层流范围(1040<Re<1891)内,Al2O3/W和Al2O3-CuO/W纳米流体的Nu数与去离子水相比分别最大增加了32.09%和38.38%;而CuO/W纳米流体由于团聚体尺寸大,流体向前驱动力不足以克服自重易沉积于管内壁,传热效果反而比水差。在紊流范围(4073<Re<7806)内,受向前驱动力及流体分子自身旋转的作用,纳米流体的传热性能明显高于纯水,且混合纳米流体的综合传热性能最佳。综合考虑综合传热性能与经济性因素,在层流与紊流区内最适用于实际工业生产的纳米流体分别为Al2O3/W和Al2O3-CuO/W纳米流体。

关键词: 混合纳米流体, 热传导, 纳米粒子, 对流, 流动与传热特性, 强化传热因子, 热经济性分析

CLC Number: 

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