The Effect of Cooling Loss Reduction on the Potential of Thermal Efficiency Improvement in a High Boosted Diesel Engine with Waste Heat Recovery Systems

Abstract

Although cooling loss reduction is one of the approaches to improve brake thermal efficiency in a diesel engine, it doesn’t only contribute to the brake thermal efficiency improvement but most of it converts to the increase in exhaust heat loss. The increased exhaust heat loss due to the in-cylinder cooling loss reduction is effective to enhance the effect of waste heat recovery. In the engine system considered with waste heat recovery system, brake thermal efficiency may be improved by the effect of in-cylinder cooling loss reduction and the effect of waste heat recovery at partial load.