Abstract
Waste heat recovery (WHR) technologies were investigated by many researchers. To apply the WHR to a vehicle, it is important that the energy of waste heat predict on a transient condition. In this paper, we developed the vehicle thermal model for prediction of energy flow and for establishment of control strategy of the WHR. A Rankin cycle was selected as the WHR, and system configurations were investigated for a light duty commercial vehicle and best system configuration was applied with vehicle thermal model. The effect of WHR on the fuel consumption was investigated using the vehicle thermal model. When the Rankin cycle was integrated in the vehicle, fuel economy was improved in highway mode. It was found that the control of pump and expander in Rankin cycle is important in urban mode.
