Abstract
The reduction of CO2 emission by the transport sector is necessary to be realized the low carbon society. In the near future, further CO2 emission reduction is expected by the diffusion of PHEV. The aim of this study was to evaluate the potential of PHEV to reduce CO2 emission based on real-world driving data (probe car data) and simulation. The probe car data of 35 conventional HEVs from April to August in 2011 were analyzed. The type of simulated PHEV system was all electric range, which operated only by battery power as long as available battery capacity was remaining (EV mode) , and then operated like conventional HEV after battery was depleted (HEV mode). Charging frequency was once a day at home after midnight as a realistic scenario. The results showed that the travel distance of 43% was converted to EV mode, and the gasoline consumption was reduced by 44%. The CO2 emission was totally reduced by 17% considering electric power consumption. CO2 emissions of each vehicle were reduced by 1-44%. CO2 reduction amount of each vehicle varied widely reflecting their each own ways of car use and operating conditions. It is indicated that the diffusion of PHEV is a realistic and efficient measure to reduce CO2 emissions in consideration of actual car use and operating conditions. Furthermore, low carbon power supply as well as diffusion of PHEV is more effective to CO2 reduction.
Highlights
The reduction of CO2 emission by the transport sector is necessary to be realized the low carbon society
Figure4: Relationship between CO2 emission rate derived from power consumption and CO2 reduction rate of PHEV compared to conventional HEV
The CO2 emission was totally reduced by 17% considering electric power consumption
Summary
The reduction of CO2 emission by the transport sector is necessary to be realized the low carbon society. In Japanese local cities where there are many persons who depend on passenger cars for their daily transportation, it seems that the diffusion of conventional and plug-in hybrid electric vehicle (HEV and PHEV) is one of the most realistic and efficient measure to reduce CO2 emission from passenger cars. A variety of car use and operating conditions makes evaluation difficult. Mitsutani et al [1] reported that the actual EV driving range of PHEV was decreased by the use of auxiliary electric power which is mainly consumed by cabin heating and cooling. The aim of this study was to solve the following issues and evaluate the potential of PHEV compared with HEV to reduce CO2 emission based on real-world driving data (probe car data) and modeling. Accurate estimation of the travel distance converted to EV mode, and the fuel consumption (CO2 emission) in HEV mode according to actual car use and operating conditions. The aim of this study was to solve the following issues and evaluate the potential of PHEV compared with HEV to reduce CO2 emission based on real-world driving data (probe car data) and modeling. Accurate estimation of the travel distance converted to EV mode, and the fuel consumption (CO2 emission) in HEV mode according to actual car use and operating conditions. Consideration of CO2 emission from electric power consumption by use of auxiliary: headlamp, air conditioner in summer
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