Abstract

In this experimental and statistical investigation, Silver (Ag) nanoparticles with varying particle sizes of 20 nm with the base fluid of EG and DI water are tested to improve the heat transfer properties of the car radiator. The thermophysical properties are tested at temperatures varying from 35 to 75 °C. Results showed that small nanoparticles had higher thermophysical properties than large nanoparticles. The heat transfer properties along with friction factor characteristics are measured. A total of 20 nm of Ag has higher thermal transfer properties than other nanofluids; it can be concluded that smaller nanoparticles can improve thermal properties and minimize the radiator size compared to traditional coolants. A systematic optimized RSM-based architecture has been developed to define the quantitative estimate of the specific design parameters influencing nanofluid heat transfer properties and friction factor characteristics. Finally, correlations are developed for experimental Nusselt number and friction factor values by regression analysis.

摘要

在此实验和统计调查中，测试了具有 20 nm 不同粒径的银 (Ag) 纳米粒子与 EG 和 DI 水的基液，以改善汽车散热器的传热性能。热物理性质在 35 至 75 °C 的温度范围内进行测试。结果表明，小纳米粒子比大纳米粒子具有更高的热物理性质。测量传热特性以及摩擦系数特性。总计20nm的Ag比其他纳米流体具有更高的传热性能；可以得出结论，与传统冷却剂相比，较小的纳米颗粒可以改善热性能并最大限度地减小散热器尺寸。已经开发了一个系统优化的基于 RSM 的架构来定义影响纳米流体传热特性和摩擦系数特性的特定设计参数的定量估计。最后，通过回归分析为实验努塞尔数和摩擦系数值开发相关性。