Thermoeconomic Optimization Design of the ORC System Installed on a Light-Duty Vehicle for Waste Heat Recovery from Exhaust Heat

The organic Rankine cycle (ORC) has been widely studied to recover waste heat from internal combustion engines in commercial on-road vehicles. To achieve a cost-effective ORC, trade-off between factors such as costs, power outputs, back pressure, and weight needs be carefully worked out. However, the is still huge challenge engine recovery. In this study, thermoeconomic optimization study of vehicle-mounted ORC unit proposed various exhaust gas conditions light-duty vehicle. carried out for four working fluids with different critical temperatures, respectively. Under investigated fluids, lower specific investment cost (SIC) higher mean net output (MEOP) can achieved using fluid temperature. maximum obtained by taking RC490 payback period (PB) 3.01 years when petrol EUR 1.5 per liter. strategy compared thermodynamic method MEOP an optimized objective. It shows that reached SIC results more economically. importance pressure caused installation into consideration during preliminary design phase highlighted.