Experimental study on the thermo-physical properties of car engine coolant (water/ethylene glycol mixture type) based SiC nanofluids

详细信息    查看全文

• 作者：Xiaoke Li^a ; ^{xiaokeli319@126.com" class="auth_mail" title="E-mail the corresponding author} ; Changjun Zou^a ; ^{changjunzou@126.com" class="auth_mail" title="E-mail the corresponding author} ; Aihua Qi^b
• 关键词：Nanofluids ; SiC nanoparticles ; Thermal conductivity ; Viscosity ; Overall effectiveness
• 刊名：International Communications in Heat and Mass Transfer
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：77
• 期：Complete
• 页码：159-164
• 全文大小：766 K

文摘

The engine coolant (water/ethylene glycol mixture type) becomes one of the most commonly used commercial fluids in cooling system of automobiles. However, the heat transfer coefficient of this kind of engine coolant is limited. The rapid developments of nanotechnology have led to emerging of a relatively new class of fluids called nanofluids, which could offer the enhanced thermal conductivity (TC) compared with the conventional coolants. The present study reports the new findings on the thermal conductivity and viscosity of car engine coolants based silicon carbide (SiC) nanofluids. The homogeneous and stable nanofluids with volume fraction up to 0.5 vol.% were prepared by the two-step method with the addition of surfactant (oleic acid). It was found that the thermal conductivity of nanofluids increased with the volume fraction and temperature (10–50 °C), and the highest thermal conductivity enhancement was found to be 53.81% for 0.5 vol.% nanofluid at 50 °C. In addition, the overall effectiveness of the current nanofluids (0.2 vol.%) was found to be ~ 1.6, which indicated that the car engine coolant-based SiC nanofluid prepared in this paper was better compared to the car engine coolant used as base liquid in this study.