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首页> 外文期刊>Nanoscience and Nanoengineering >Corrosion and Heat Transfer Characteristics of Water Dispersed with Carboxylate Additives & Multi-walled Carbon Nano Tubes
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Corrosion and Heat Transfer Characteristics of Water Dispersed with Carboxylate Additives & Multi-walled Carbon Nano Tubes

机译：含羧酸盐添加剂和多壁碳纳米管的水的腐蚀和传热特性

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摘要

This paper summarizes a recent work on anti-corrosive properties and enhanced heat transfer properties of carboxylated water based nanofluids. Water mixed with sebacic acid as carboxylate additive found to be resistant to corrosion and suitable for automotive environment. The carboxylated water is dispersed with very low mass concentration of carbon nanotubes at 0.025%, 0.05% & 0.1%. The stability of nanofluids in terms of zeta potential is found to be good with carboxylated water compared to normal water. The heat transfer performance of nanofluids is carried out on an air cooled heat exchanger similar to an automotive radiator with incoming air velocities across radiator at 5 m/s, 10m/s and 15m/s. The flow Reynolds number of water is in the range of 2500 to 6000 indicating developing flow regime. The corrosion resistance of nanofluids is found to be good indicating its suitability to automotive environment. There is a slight increase in viscosity and marginal decrease in the specific heat of nanofluids with addition of carboxylate as well as carbon nanotubes (CNTs). Significant improvement is observed in the thermal conductivity of nanofluids dispersed with CNTs. During heat transfer experimentation, the inside heat transfer coefficient and overall heat transfer coefficient has also improved markedly. It is also found that the velocity of air and flow rate of coolant plays an important role in enhancement of the heat transfer coefficient and overall heat transfer coefficient.
机译：本文总结了有关羧化水基纳米流体的抗腐蚀性能和增强的传热性能的最新工作。发现与癸二酸混合的水作为羧酸盐添加剂具有抗腐蚀性能，适用于汽车环境。羧化水以非常低的碳纳米管质量浓度（0.025％，0.05％和0.1％）分散。发现与常规水相比，羧化水对纳米流体的ζ电势稳定性良好。纳米流体的传热性能在类似于汽车散热器的风冷热交换器上进行，跨散热器的进风速度分别为5 m / s，10m / s和15m / s。水的雷诺数在2500至6000的范围内，表明正在发展的水流状态。发现纳米流体的耐腐蚀性良好，表明其对汽车环境的适用性。通过添加羧酸盐以及碳纳米管（CNT），纳米流体的粘度会略有增加，比热会略有下降。观察到分散有CNT的纳米流体的热导率有了显着改善。在传热实验中，内部传热系数和整体传热系数也有明显提高。还发现，空气的速度和冷却剂的流量在提高热传递系数和整体热传递系数方面起着重要作用。

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