Heat Transfer Nanofluid for High Performance engine cooling

F. Micali , M. Troberg, J. Hammett, A. de Risi
TCT srl, IT

Keywords: nanofluid, heat transfer capability, temperature reduction, engine cooling, coolant, exhaust valve

Summary:

Example of High Performing Heat Transfer Fluids used to increase the heat transfer capability is The nanofluids contains Copper Oxide particles in suspension inside conventional fluids. The nanofluid formulated and developed for this test has relevant heat transfer capability that depends on the particles concentration. It might have a potential application as coolant of 4-stroke Medium Speed Diesel engines leading to a temperature reduction of the exhaust valve compared to the water case. To prove the engine cooling performance of the nanofluid with certain volume concentration of nanoparticles a test campaign was run on a single-cylinder 4-stroke diesel engine. The temperature of the exhaust valve spindle and exhaust valve seat in the cylinder head, were measured at low and full engine loads using as coolant initially water and then the nanofluid with Copper Oxide nanoparticles at two volume concentration. Measured temperatures put in evidence that at 100% engine load in transient and steady state mode by using the nanofluid it was possible to achieve reduction in temperature up to 13% on the exhaust valve spindle and up to 4% on the exhaust valve seat respectively. Particles sedimentation was also observed during tests.