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An Experimental Study on the Simultaneous Effect of Nanofluid and Tube Insert on the Thermal Performance of An Automobile Cooling System
Author(s): Amir Karimdoost Yasuri, Ehsan Soleimani
Keywords: Nanofluid; Cooling; Tube Insert; Al2O3
In this research, an experimental study is conducted to investigate the effect of simultaneous use of tube insert and nanofluid on the thermal performance of the automotive cooling system (radiator). Al2O3-water based nanofluid is used and the flow regime was laminar (Reynolds 1000-1800). For this study, an experimental automotive cooling system is designed and built. Thermal performance of Al2O3-water nanofluid at three mass concentrations of 0.1, 0.2 and 0.4 is monitored by variations of flow rate. In this research, a tube insert with a steel wire rod and a sine profile inside the radiator tube is used as a turbulent-maker. The results show that the sole use of nanofluid, without a tube insert inside the radia-tor, increases the heat transfer coefficient by about 11%, and the use of a tube insert together with dis-tilled water increases heat transfer coefficient by about 35%. Finally, the use of tube insert together with Al2O3-water based nanofluid at their best mass concentration increases heat transfer coefficient by about 56%.