Optimized Energy Scheduling of Residential DC Building: Case of Nordic Climate

Abstract

In response to growing concerns about environmental pollution, energy shortages, and power supply security, efforts have been intensified to improve the energy efficiency of residential buildings, which account for around 27 percent of global energy consumption. This has led to the concept of nearly zero energy buildings (nZEB) that employ modern materials and construction techniques, efficient heating systems, and local power generation from renewable energies. In this study, the focus is on a nZEB located in the Nordic climate zone, with the primary goal of minimizing the electricity bill and maximizing self-consumption from rooftop PV. To achieve this, a novel battery management algorithm is proposed, and dc building is considered for increased efficiency. It was found that although it is not possible to cover day-by-day energy or heating system needs from PV generation, with the use of 18 kWh battery and proposed scheduling algorithm, it is possible to practically exclude electrical energy purchases during peak hours.