Optimized energy management of a photovoltaic-heat pump sector coupling system with electrical and thermal energy storages in an office building

About 77% of energy demand in non-residential building is for heating and cooling, highlighting the urgent need for sustainable solutions to decarbonise this sector. A promising approach is the integration of a photovoltaic (PV) system, a reversible powercontrolled heat pump (HP) with electrical and thermal energy storage, managed by an energy management system (EMS). Latent thermal energy storage (TES) enables demand flexibility for maximum renewable energy utilisation via HPs. A lithium-ion battery (LIB) is incorporated to dynamically balance load and generation mismatches. Such a PV-HP system operated by a priority-based EMS will be introduced in this paper. The system is used to efficiently regulate energy flows to provide thermal and electrical energy to the office building. The EMS features an optimised LIB charging management to prevent high state-of-charge (SOC) levels over time and assesses TES real-time conditions to adjust HP operation accordingly. A case study examines system performance over a representative day, achieving 81.6% self-sufficiency and 79.8% self-consumption rates.