Volume 2: Innovative Solutions for Energy Transitions: Part I

A Preliminary Study of Application of Smart Thermal Insulation Coating on Improving Thermal Efficiency in a Marine Low-Speed Diesel Engine Jiale Cao, Tie Li, Xinyi Zhou

Abstract

The performance of heat insulation by “Smart Thermal Insulation Coating (Smart TIC)” in the combustion chamber walls were studied in a marine low speed diesel engine. Different with the adiabatic engine that features constant high temperature on combustion chamber walls and low volumetric efficiency, the Smart TIC with low heat conductivity and low heat capacity materials leads to “Temperature Swing” on the combustion chamber walls, reducing the heat transfer loss while increasing the volumetric efficiency. The simulation results show that the Smart TIC with thermal conductivity of 0.1 W/(mK), heat capacitance of 20 J/(kg*K) and thicknesses of 0.1 mm can increase the indicated thermal efficiency by 3.55% with slightly increase of NOx emissions.

Keywords Smart Thermal Insulation Coating, low-heat conductivity and low-heat-capacity materials, volumetric efficiency, thermal efficiency, NOx emissions