(616d) Evaluation of Itev (Air-conditioner Integrated Electric Vehicle) Using in the PV & EV Combined System

After the Great East Japan Earthquake, it has become necessary to reduce nuclear power dependence, as well as CO₂ emissions. Smart Community is expected to be one of the solutions. In the Smart Community, energy supply and demand system has been developing to manage with ICT (Information and Communication Technology) to utilize energy efficiently and increase the amount of renewable energy. In one of the studies, the photovoltaic power generation (PV) and electric vehicle (EV) combined system have been proposed. In this system, EV which is utilized as energy storage and transportation can use natural energy for motive power and supplies electricity to a house. So, this two-way system is possible to reduce CO₂ emissions drastically with a short payback period. However, it will take a long time before EV becomes widespread, because it’s necessary to solve some problems which are high energy consumption of air-conditioner, high cost of storage battery and risk aversion of dead battery. Therefore, air-conditioner Integrated Electric Vehicle (ITEV) which has great possibility to solve the current EV problems has been proposed. ITEV has a hybrid system which activates the air-conditioning system and generates electric power through the use of a micro-engine, a micro-gas turbine or a small SOFC (Solid Oxide Fuel Cell). On the other hand, ITEV which uses fossil fuels may increase CO₂emissions compared to EV.

    In this paper, the authors have studied the introduction effects of ITEV using in the PV and EV combined system which is considered to optimize not only the vehicle but also as s whole energy system in a Smart community.

    As a result, ITEV can reduce CO₂ emissions by 37% as the same as current EV in the PV and EV combined system, because ITEV has the hybrid system which generates electric energy in the case of low air-conditioning load. While CO₂ emissions of ITEV is increased by using fossil fuels, consequently supplied energy from ITEV to a house is increased and CO₂ emissions of the house are reduced. Moreover, ITEV is able to gain the cruising range twice as long as EV with the same battery capacity. ITEV is also able to reduce the cost compared to EV. Because of the long cruising range, ITEV can be utilized as a means of commuting not only short commuting range like Japan but also the long commuting range like Europe and North America. In this paper, the micro-engine efficiency is assumed to be 30%, also heat recovery from the micro-engine is not utilized. ITEV will have a great possibility of further reducing CO₂ emissions and improving energy utilization efficiency.