Muruganandam M - Saveetha Engineering College
P. C. Mukesh Kumar - University College of Engineering

The exciting coolants have reached their limitations of heat dissipating capacity. It is studied from the literature review that nanofluids are the novel and alternate heat transfer medium with significant temperature-dependent thermal conductivity even at very low particle concentrations than the conventional heat transfer fluids. In this experimental investigation, the multi walled carbon nanotube (MWCNT) water is used as a coolant in four stroke single cylinder diesel engine to assess the performance of the engine. The MWCNT/ water nanofluid is prepared with surfactant to get the stable suspension of nanofluid. Tests are performed by constant the mass flow rate ۳۳۰ LPH of coolant nanofluids and by changing the load and by keeping the speed constant. It is found that the brake thermal efficiency increases by ۱۰ to ۱۵%, exhaust temperature decreases by ۸ to ۱۰% decreases and the specific fuel consumption decreases when compared to water as a coolant at the same testing condition.

Nanofluid, Thermal conductivity, Coolant, Mass flow, Brake thermal efficiency