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Thermal hydraulic performance for hybrid composition ratio of TiO2–SiO2 nanofluids in a tube with wire coil inserts
Case Studies in Thermal Engineering ( IF 6.8 ) Pub Date : 2021-02-23 , DOI: 10.1016/j.csite.2021.100899
W.H. Azmi , K. Abdul Hamid , A.I. Ramadhan , A.I.M. Shaiful

Hybrid nanofluids flows with wire coils are proven to be beneficial in improving the performance of heat transfer. The thermal-hydraulic performance with different hybrid composition ratio for two or more suspended nanoparticles in the hybrid nanofluids with wire coils is unknown. Therefore, the research work was carried out to evaluate the effect of hybrid composition ratio on the overall system performance for flow with wire coils. The TiO2–SiO2 nanofluids was prepared at constant 1.0% of volume concentration and hybrid composition ratio, R of TiO2 to SiO2 nanoparticles at variation of 0.2, 0.4, 0.5, 0.6, and 0.8. The wire coils were studied for various pitch ratio up to 4.17. The TiO2–SiO2 nanofluids heat transfer was improved up to 211.75% for flow with wire coils. The best thermal performance factor (TPF) was exceeded 1.72 and performed with R = 0.2 composition ratio and pitch ratio of 0.83. The present TPF for hybrid nanofluids is higher than TPF for existing single nanofluids hence confirmed the applicability of TiO2–SiO2 nanofluids at R = 0.2 composition ratio flow with wire coils.



中文翻译:

带有线圈嵌件的管中TiO 2 -SiO 2纳米流体混合组成比的热工水力性能

事实证明,带有线圈的混合纳米流体流在改善传热性能方面是有益的。带有线圈的杂化纳米流体中两种或多种悬浮纳米粒子具有不同杂化组成比的热工水力性能尚不清楚。因此,进行了研究工作,以评估混合组成比对带有线圈的流体整体系统性能的影响。TiO 2 -SiO 2纳米流体的体积浓度和混合组成比恒定为1.0%,TiO 2与SiO 2纳米颗粒的R的变化为0.2、0.4、0.5、0.6和0.8。研究了各种线圈的螺距比,最高可达4.17。TiO 2–SiO 2纳米流体的传热效率提高了211.75%。最佳热性能因子(TPF)超过1.72,并且以R  = 0.2组成比和0.83的沥青比进行。目前的杂化纳米流体的TPF高于现有的单纳米流体的TPF,因此证实了TiO 2 -SiO 2纳米流体在R  = 0.2组成比的情况下可用于线绕线圈。

更新日期:2021-02-24
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