Tetik Tugba, Karagoz Yasin
Istanbul Medeniyet University, Department of Mechanical Engineering, Istanbul, Turkiye.
Heliyon. 2024 Sep 26;10(19):e38352. doi: 10.1016/j.heliyon.2024.e38352. eCollection 2024 Oct 15.
The present study experimentally investigates and compares the performance of a radiator system cooled by a water-ethylene glycol (70:30) based AlO-SiO-TiO nanofluid, with that of a radiator cooled by a water/EG mixture. The equal pumping power criterion of the pump with an equal mass flow rate was used for comparison. Mass flow rate and nanoparticle volume fraction on a radiator cooling system and the radiator's capacity have been studied. Five different nanofluids were prepared with different composition ratios of AlO-SiO-TiO with a total of 0.45 % nanoparticles. The flowrate changed in the range of 0.02-0.032 kg/s. The results showed that the increase in heat transfer is mainly due to the flow velocity and the nanoparticles added in different proportions to the base liquid. The UA value and enhancement ratio of NF1 compared to EG/W is 14-18.5 %, for NF2 it is 14.9-21.8 %, for NF3 it is 15.1-23.4 %, for NF4 it is 15.6-27.5 %, and for NF5 it is 15.9-30 % at 0.02 kg/s and 0.032 kg/s. According to the experimental study results, nanofluids with low concentrations of nanoparticles can enhance the heat transfer rate up to 30 % as a comparison with water/EG.
本研究通过实验研究并比较了由水 - 乙二醇（70:30）基AlO - SiO - TiO纳米流体冷却的散热器系统与由水/乙二醇混合物冷却的散热器的性能。在质量流率相等的情况下，使用泵的等泵送功率准则进行比较。研究了散热器冷却系统上的质量流率、纳米颗粒体积分数以及散热器的容量。制备了五种不同的纳米流体，其AlO - SiO - TiO的组成比例不同，纳米颗粒总量为0.45%。流速在0.02 - 0.032 kg/s范围内变化。结果表明，传热的增加主要归因于流速以及以不同比例添加到基础液体中的纳米颗粒。在0.02 kg/s和0.032 kg/s时，与乙二醇/水相比，NF1的UA值和增强率为14 - 18.5%，NF2为14.9 - 21.8%，NF3为15.1 - 23.4%，NF4为15.6 - 27.5%，NF5为15.9 - 30%。根据实验研究结果，与水/乙二醇相比，低浓度纳米颗粒的纳米流体可将传热速率提高高达30%。
