Paper Conference

Proceedings of ASim Conference 2016: 3rd Asia conference of IBPSA-China, Japan, Korea


Study on Efficiency of Energy Demand and Supply System of Direct-current Power Supply System ~Applicability of Direct-current Power Supply System in Residential Building~

Gyuyoung Yoon, Mami Shimizu, Shinji Sakai

Abstract: This study aims to promote the widespread use of the direct current (DC) power supply system in residential buildings. In this study, the detached typical house for a single family in Japan is assumed as a model building, where photovoltaic panels are installed. When the DC power system was introduced, the energy consumption and running cost of the model building were estimated and analyzed with regard to energy savings and running cost reduction. The DC power system covered appliances with several different voltage ranges, such as low-and high-voltage appliances including the airconditioning equipment and hot water equipment. The results indicate that the energy saving is greater than 13% when the DC power system supply power all possible appliances, and the running cost would be smallest.
Keywords: DC power supply, energy saving, running cost, impact on power-grid