Based on the waste heat recovery using the organic Rankine cycle(ORC)

an advanced vehicle energy supply system was proposed to satisfy the different energy demands of vehicles in every season. The proposed system can not only supply enough warm or cool air

but it can also be used to improve the overall vehicle thermal efficiency and fuel saving in different seasons by recovering waste heat from gasoline engine coolant and exhaust gas through the ORC subsystem. In winter the system can supply enough heat to vehicle cabin

while achieving additional net power output. In spring and autumn the system can transfer heat in exhaust gas and coolant into power

saving energy with most significant amount compared with the other seasons. In summer the system supplies the air conditioning subsystem with power

while reducing fuel consumption

and lowering overall energy consumption. Based on the performance data of a Tianjin FAW TOYOTA 8A-FE gasoline vehicle

the energy conservation characteristics of the proposed system was simulated. The results show that reducing the logarithmic mean temperature difference of the first evaporator and environment temperature and enhancing the vehicle speed can increase the turbine power output and fuel saving. The maximum values of the turbine power output and fuel saving rate are obtained in winter

and they are 11.0kW and 17.2% respectively. The proposed system can remarkably reduce fuel consumption

having potential in energy saving

since it can effectively recover waste heat from engine coolant and exhaust gas

and the operation of the ORC heat transfer power subsystem is not subject to the seasons.