Implementation Feasibility and Efficiency of Automobile Energy Recovery Systems

This study will investigate five energy recovery systems. The feasibility of implementation and fuel efficiency are the standards for evaluating electric turbochargers (E-Turbos), mechanical flywheels, thermoelectric generators (TEGs), Rankine cycle generators and regenerative braking systems (RBSs). The feasibility of E-Turbos was evaluated under the Worldwide Harmonized Light Vehicles Test Cycle (WLTC) and the New European Driving Cycle (NEDC). RBSs showed high feasibility and recovered up to 50% of braking energy. TEGs generated an average of 5.8W of electrical energy. Flywheel energy storage systems (FESSs) can help buses increase efficiency by nearly 40%. An organic Rankine Cycle (ORC) generator can recover up to 34% of energy. RBSs were found to be the most effective and feasible solution among those evaluated. Future research should focus on optimizing the integration of regenerative braking system with hybrid or electric powertrains, and exploring the potential of combing multiple energy recovery methods and control strategies.