Experimental study on the heat transfer of MWCNT/water nanofluid flowing in a car radiator

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• 作者：Guilherme Azevedo Oliveira ^{guilherme_esd@mec.ufu.br} ; Edwin Martin Cardenas Contreras ^{emcardenas.1989@gmail.com} ; Enio Pedone Bandarra Filho ; ^{bandarra@ufu.br}
• 关键词：Nanofluid ; Radiator ; MWCNT ; Heat transfer
• 刊名：Applied Thermal Engineering
• 出版年：2017
• 出版时间：25 January 2017
• 年：2017
• 卷：111
• 期：Complete
• 页码：1450-1456
• 全文大小：1215 K
• 卷排序：111

文摘

This study is concerned with an experimental evaluation of the thermal performance of multi-walled carbon nanotubes (MWCNT) dispersed in distilled water flowing inside an automotive radiator. A two-step method called high-pressure homogenization was used to disperse the MWCNT nanoparticles in water, in concentrations varying between 0.05 and 0.16 wt%. Experiments have been carried out in an experimental set up composed by a wind tunnel that simulates the air flow through a car radiator, and a hot fluid circuit, that circulates the nanofluid inside the radiator. The air flow rate was maintained constant at 0.175 kg/s. The mass flow rate of the hot fluid varied from 30 up to 70 g/s and the inlet temperature was maintained constant at 50, 60, 70 and 80 °C, respectively. The temperature drop and heat transfer rate have been investigated. A slight-decrease on the heat transfer rate, up to 5%, was found for all test conditions. On the other hand as the nanoparticle concentration increased, the heat transfer rate decreased.