Influence of key geometry parameters on heat transfer and flow resistance properties of toothed internal spiral piece cracking furnace tube

Xu, Fang; oftware, Dongsheng Zhang; Zhang, Lin; Bu, Shi; Ji, Yixiang; Fang, Jiamei; Ding, Hong; Xu, Weigang

doi:10.1016/j.applthermaleng.2022.118170

Cited by 7 publications

(1 citation statement)

References 38 publications

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“…Various techniques have been used, containing the utilization of porous materials (Izadi et al 2019 , Peng et al 2021 ), microchannel heat sinks (Izadi et al 2013a , Mehryan et al 2020b , Lanjwani et al 2021 ), inserts (such as twisted strips, coils, swirling flow devices, and turbulators) (Zaboli et al 2019 , Shehzad et al 2021a , Ajarostaghi et al 2022 , Noorbakhsh et al 2022 , Izadi et al 2023b ), and rough surfaces. For example, wavy surfaces (He et al 2022 ), elongated surfaces (such as fins) (Goel and Singh 2021 , Shehzad et al 2021b ), depressions and ridges (Cao et al 2021a ), change material (Shehzad et al 2021a , Izadi et al 2022a , Xiong et al 2022 ), nanofluids (Izadi et al 2013b , Valipour et al 2017 , Mohammadpour et al 2022 ), spiral tubes (Xu et al 2022 ), and helical tubes (Rashidi et al 2021 ). Some passive methods focused on improving the rate of heat exchange are further discussed in the following.…”

Section: Methods Of Improving Heat Transfer In Fpscsmentioning

confidence: 99%

Recent progress on flat plate solar collectors equipped with nanofluid and turbulator: state of the art

Zaboli,

Saedodin,

Ajarostaghi

et al. 2023

Environ Sci Pollut Res

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This paper reviews the impacts of employing inserts, nanofluids, and their combinations on the thermal performance of flat plate solar collectors. The present work outlines the new studies on this specific kind of solar collector. In particular, the influential factors upon operation of flat plate solar collectors with nanofluids are investigated. These include the type of nanoparticle, kind of base fluid, volume fraction of nanoparticles, and thermal efficiency. According to the reports, most of the employed nanofluids in the flat plate solar collectors include Al2O3, CuO, and TiO2. Moreover, 62.34%, 16.88%, and 11.26% of the utilized nanofluids have volume fractions between 0 and 0.5%, 0.5 and 1%, and 1 and 2%, respectively. The twisted tape is the most widely employed of various inserts, with a share of about one-third. Furthermore, the highest achieved flat plate solar collectors’ thermal efficiency with turbulator is about 86.5%. The review is closed with a discussion about the recent analyses on the simultaneous use of nanofluids and various inserts in flat plate solar collectors. According to the review of works containing nanofluid and turbulator, it has been determined that the maximum efficiency of about 84.85% can be obtained from a flat plate solar collector. It has also been observed that very few works have been done on the combination of two methods of employing nanofluid and turbulator in the flat plate solar collector, and more detailed work can still be done, using more diverse nanofluids (both single and hybrid types) and turbulators with more efficient geometries.

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