Abstract
CO_2 emissions, which are the cause of global warming, are increasing in the residential sector while staying constant in the industrial sector in Japan. One promising solution to reduce CO_2 emissions is installing high efficiency devices that supply heat and/or power: photo voltaics, a heat pump water heater and a co-generation system. Optimizing the devices require changing an existing energy system into innovative energy systems, which is a microgrid. The objective of our research was to reduce CO_2 emissions with microgrid. We used a simulation to determine the reduction with the microgrid that consists of three residences and with the virtual-MG that explored the potential of the MG We observed that the virtual microgrid reduced while the MG of this research didn't reduce. We concluded that the microgrid has the potential reduction while reaching microgrid's full potential will require making the capacity or the running time of the devices small.
