Conventionally, two different liquids are used in automobile industries for lubrication and cooling purpose, and its property variations demand different handling systems (pump, storage tank, etc.). In this project, we propose to use single fluid for both lubrication and cooling purpose, which reduces the number of accessories and also promotes interchangeability. Magnetorheological fluid (MRF) is highly viscous in nature; generally viscous fluids are good in lubrication, but fail to provide required cooling effect because of its high kinematic viscosity, whereas, with the small influence of magnetic field intensity, magnetorheological fluid could act as a heat transfer fluid.

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In this study, the characteristics of surface radiation heat transfer properties of stainless steel 304with Black Nickel coating is investigated with and without exposure of sunlight to measure the emissivity (€) and absorptivity (ὰ). Exposure of sunlight is carried out for various time internals (240, 480, 720 and 960 hrs). For every 10 equal intervals, the material is measured for temperature dependency property. The emissivity (€) and absorptivity (ὰ) is measured for various spray distance (30, 35 and 40mm) of coating. It is observed that emissivity of the material is decreasing and absorptivity of the material is increasing with exposure time. The combined effect of decrease in emissivity and increase in absorptivity leads to which the rate of radiation loss for exposed surface with compared to unexposed surface is decreasing with black nickel coating at an optimum spray distance of 35mm.