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<p>Heating and cooling systems are often designed and manufactured based on various models of heat transfer devices, each having unique characteristics. Among these, the shell and spiral tube heat exchanger is preferred according to its geometry, which is heavy on space saving and therefore has high-value heat transfer compared to other options. The study of nanofluids has gained some traction recently, intending to replace the conventional working fluids used in heat exchangers. Unique properties of nanofluids could lead to performance boosts that affect various designs of heat exchange systems: Traditional approaches cannot be adopted due to the presence of these nanofluids. In fact, the properties of nanofluids have been studied to increase the efficiency of these heat exchangers. Remarkable progress has been achieved in recent years in the understanding of distinct characteristics of different nanofluids. This study provides a comprehensive evaluation, bringing together the findings from multiple literature sources into spiral tube heat exchangers, with nanofluids as the main exchange medium. In so doing, it brings to the forefront the fact that there exists a collation of disparate conclusions and opinions among the researchers. These differences arise due to the complexity of the behavior of nanofluids and their interaction with heat exchanges. Hence, the effectiveness of spiral tube heat exchangers using nanofluids is directly related to the particular type of nanofluid employed and properties therein. Researchers are still actively researching and debating this topic. In summary, it was indicated that the dynamic arena of heat exchanger development now focuses upon integrating spiral tube heat exchangers with nanofluids, which details the very interaction of fluid characteristics with efficiency in heat exchangers. The study found that using a volume concentration of 0.5% of multiwall carbon nanotube/water nanofluid at a tube with a 15,000 Reynolds number resulted in a 31.5% boost in Nusselt number value and a 47.35% decrease in pressure value.</p>

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Impact of hybrid nanofluids in the heat transfer augmentation in the shell and spiral coil heat exchangers: a review

  • 期刊论文

  • 发表日期：

    2025年7月19日

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  • Najiba Hasan Hamad,
  • Ranj Sirwan Abdullah,
  • Ahmed Mohammed Adham

摘要

Heating and cooling systems are often designed and manufactured based on various models of heat transfer devices, each having unique characteristics. Among these, the shell and spiral tube heat exchanger is preferred according to its geometry, which is heavy on space saving and therefore has high-value heat transfer compared to other options. The study of nanofluids has gained some traction recently, intending to replace the conventional working fluids used in heat exchangers. Unique properties of nanofluids could lead to performance boosts that affect various designs of heat exchange systems: Traditional approaches cannot be adopted due to the presence of these nanofluids. In fact, the properties of nanofluids have been studied to increase the efficiency of these heat exchangers. Remarkable progress has been achieved in recent years in the understanding of distinct characteristics of different nanofluids. This study provides a comprehensive evaluation, bringing together the findings from multiple literature sources into spiral tube heat exchangers, with nanofluids as the main exchange medium. In so doing, it brings to the forefront the fact that there exists a collation of disparate conclusions and opinions among the researchers. These differences arise due to the complexity of the behavior of nanofluids and their interaction with heat exchanges. Hence, the effectiveness of spiral tube heat exchangers using nanofluids is directly related to the particular type of nanofluid employed and properties therein. Researchers are still actively researching and debating this topic. In summary, it was indicated that the dynamic arena of heat exchanger development now focuses upon integrating spiral tube heat exchangers with nanofluids, which details the very interaction of fluid characteristics with efficiency in heat exchangers. The study found that using a volume concentration of 0.5% of multiwall carbon nanotube/water nanofluid at a tube with a 15,000 Reynolds number resulted in a 31.5% boost in Nusselt number value and a 47.35% decrease in pressure value.