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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental investigation on Al_2O_3-W, SiO_2-W and ZnO-W nanofluids and their application in a shell and tube heat exchanger
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Experimental investigation on Al_2O_3-W, SiO_2-W and ZnO-W nanofluids and their application in a shell and tube heat exchanger

机译：Al_2O_3-W，SiO_2-W和ZnO-W纳米流体的实验研究及其在管壳式换热器中的应用

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摘要

In this research, overall performance of a shell and tube heat exchanger operated with Al_2O_3-W, SiO_2-W, and ZnO-W nanofluids were experimentally investigated. Al_2O_3-W and SiO_2-W nanofluids were prepared without using any surfactant. The polyvinylpyrrolidone (PVP) surfactant was used to stabilize ZnO-W and Fe_3O_4-W nanofluids. Photo capturing method was used to justify the stability. However, Fe_3O_4-W nanofluid has not been stabilized by PVP so it was not considered for further analysis. Highest convective heat transfer coefficient (h_(fT)), overall heat transfer coefficient (U_0), and actual heat transfer (q_(fT)) have been observed for ZnO-W and lowest effectiveness (ε), h_(fT), U_0 and q_(fT) have been found for SiO_2-W. Approximately, 50%, 15%, and 9% enhancement in h_(fT) have been found for ZnO-W, Al_2O_3-W, and SiO_2-W nanofluids, respectively. About 35%, 26%, and 12% improvement of U_0 were observed accordingly for using the above-mentioned nanofluids and q_(fT) also improved around 51%, 32%, and 26%, respectively compared to water. Experimentally, in case 1 (at constant shell side fluid flow of 4 lpm with different tube side fluid flow from 2 to 8 lpm), highest performance can be attained at 6 lpm using 0.3 vol.% of ZnO-W (with PVP) nanofluid. Likewise, highest performance reached at 7 lpm using 0.5 vol.% of Al_2O_3-W and SiO_2-W. In case 2 (at the constant tube side fluid flow of 4 lpm with different shell side fluid flow from 2 to 8 lpm), highest performance can be achieved at 8 lpm for all nanofluids. However, overall performance of the shell and tube heat exchanger can be improved about 35% by using ZnO-W (with PVP) nanofluids.
机译：在这项研究中，实验研究了使用Al_2O_3-W，SiO_2-W和ZnO-W纳米流体的管壳式换热器的整体性能。在不使用任何表面活性剂的情况下制备了Al_2O_3-W和SiO_2-W纳米流体。聚乙烯吡咯烷酮（PVP）表面活性剂用于稳定ZnO-W和Fe_3O_4-W纳米流体。使用照片捕获方法来证明稳定性。但是，Fe_3O_4-W纳米流体尚未通过PVP稳定，因此未考虑进一步分析。对于ZnO-W，对流传热系数（h_（fT）），总传热系数（U_0）和实际传热（q_（fT））最高，效率最低（ε），h_（fT），U_0已经发现SiO_2-W的q和（fT）。分别发现ZnO-W，Al_2O_3-W和SiO_2-W纳米流体的h_（fT）分别提高了50％，15％和9％。相应地，对于使用上述纳米流体，观察到U_0提高约35％，26％和12％，并且与水相比，q_（fT）也分别提高约51％，32％和26％。在实验1中（在恒定的壳侧流体流量为4 lpm，而管侧流体流量从2到8 lpm的情况下），使用0.3体积％的ZnO-W（含PVP）纳米流体，可以在6 lpm时获得最高性能。 。同样，使用0.5％（体积）的Al_2O_3-W和SiO_2-W，在7 lpm时达到了最高性能。在情况2中（在恒定管侧流体流量为4 lpm，而壳侧流体流量从2到8 lpm的情况下），对于所有纳米流体，在8 lpm时可以实现最高性能。但是，通过使用ZnO-W（带有PVP）纳米流体，管壳式热交换器的整体性能可以提高约35％。

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  • 作者

    I.M. Shahrul; I.M. Mahbubul; R. Saidur; M.F.M. Sabri;

  • 作者单位

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

    Center of Research Excellence in Renewable Energy (CoRE-RE), Research Institute, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia;

    Center of Research Excellence in Renewable Energy (CoRE-RE), Research Institute, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Saudi Arabia;

    Department of Mechanical Engineering, Faculty of 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; Shell and tube heat exchanger; Actual heat transfer; Heat transfer coefficients; Volumetric flow rates;

    机译：纳米流体;壳管式换热器;实际传热;传热系数;体积流量;

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