Abstract

To increase the effectiveness of a cooling system, utilization and control of the nucleate boiling heat transfer are desired. Our previous study revealed the relationship between the water nucleate boiling heat flux and dimensionless number. To simulate a real engine, the present study measured the nucleate boiling heat fluxes by using LLC and water, under various conditions (flow velocity, subcooling, etc.). Furthermore, the heat fluxes were compared using LLC with and without an anti-rust agent. It was confirmed that the corrosion was generated on the heating surface when using the LLC without an anti-rust agent and the corrosion affected heat transfer substantially.

Clean heating surface

Corroded heating surface

Future prospects

Know-how will be implemented into battery cooling systems & EVs inverter

Collaboration with external organizations

The Research Association of Automotive Internal Combustion Engines (AICE)

Related patents/papers

Chen, H., Suzuki, T., Asano, K., Shindo, R., Homma, A., Kimata, N., Nakaya, T.,Nakamura, K.,Yilmaz, E., Ichiyanagi, M., “Effect of Various Coolant Characteristics and Heating Surface Corrosion on Nucleate Boiling Heat Transfer in IC Engine Cooling System”, International Journal of Automotive Engineering, Vol.xx(x), 2021. – in print\n\nChen, H., Yilmaz, E., Asano, K., Shindo, R., Homma, A., Kimata, Suzuki, T., Ichiyanagi, M., “Effects of Coolant Flow Characteristics and Channel Surface Temperature on Nucleate Boiling Heat Transfer in IC Engine Cooling System”, International Journal of Automotive Engineering, Vol.11(4), 2020.