Study of Heat Transfer Characteristics of Nanofluids in an Automotive Radiator

International Conference on Advances in Materials and Manufacturing Applications 2017

Harsh, R.^1 ; Srivastav, Hitish^1 ; Balakrishnan, Prabhat^1 ; Saini, Vivek^1 ; Senthil Kumar, D.^1 ; Rajni, K.S.^1 ; Thirumalini, S.^1

Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore, Tamilnadu

641 112, India^1

关键词: Air flow-rate;    Automotive radiators;    Conductive properties;    Heat transfer characteristics;    Heat transfer rate;    Low thermal conductivity;    Nano-particle dispersions;    Overall heat transfer coefficient;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/310/1/012117/pdf
DOI  :  10.1088/1757-899X/310/1/012117

来源: IOP

【 摘 要 】

This paper presents an experimental study on heat transfer using nanofluid as coolants in engines. Previous studies shows that Al2O3is found to be more effective in heat transfer due to its high conductive property which is found to increase with concentration. Particles having diameter in the range 10-3to 10-6m have low thermal conductivities and cause clogging in the flow section along with significant friction and are highly unstable in solution. Nanoparticles on the other hand are easily dispersed and cause minimal clogging or friction in the flow. In the present work, ethylene glycol-water solution is taken as a base fluid for nanoparticle dispersion. The ratio of water to ethylene glycol used is 80:20 and it has been noted out that heat conduction improved with increasing fraction of ethylene glycol. The experiments were conducted with flow rate of 4,5,6 and 7 L/min and the air flow rate inside the duct was kept constant at 4.9 m/s. The temperature of water in the reservoir is kept at 70°C. The nanoparticles used in this experiment are Cu and TiO2having particle size less than 80nm. Result shows that there is an improvement of 24.5% in the overall heat transfer coefficient and there was also an increase of 13.9% in the heat transfer rate compared to the base fluid (80:20 Water: EG solution).