Simulation analysis of the possibility of introducing massive renewable energy and nuclear fuel cycle in the scenario to halve global CO2 emissions by the year 2050

There is growing attention to the regulation of greenhouse gas (GHG) emissions to mitigate the global warming. Hence, the target of 50% reduction of global GHG emissions by the year 2050 has been investigated in this paper. The authors have been revising the regionally disaggregated world energy model which is formulated as a large scale linear optimization model from the aspect of nuclear and photovoltaic power generation technologies. This paper explains the structure of the revised world energy model considering the intermittent characteristics of photovoltaic power generation derived from the changes in weather conditions. And also this paper shows the simulation results to halve global CO2 emissions by the year 2050 and evaluates the long-term technological options such as nuclear fuel cycle and renewable energies. Finally the authors discuss the future step for extensive revision of the energy model. (author)