Distributed real-time temperature and energy control of energy efficient buildings via geothermal heat pumps

Geothermal Heat Pumps (GHPs) are a type of Heating Ventilation and Air Conditioning (HVAC) systems that use low-temperature resources from soil and groundwater for heating/cooling. In recent years, there is an increasing interest in GHP systems due to their high energy efficiency and abundant geothermal resources. Thus, the optimization and control design of the GHP system has become a hot topic. On the other hand, as the GHP system is an ideal responsive load, the mechanism design for the GHP system to realize demand response (DR) in a Virtual Power Plant (VPP) without affecting user comfort is particularly essential. In this paper, we propose a distributed real-time temperature and energy management method via the GHP systems for multi-buildings, where both floor and radiator heating/cooling distribution subsystems in multiple thermal zones are considered. We design an energy demand response mechanism for a single GHP to track the given energy consumption command for participating in the VPP aggregation/disaggregation. Besides, a coordination mechanism for multiple GHPs is designed for the community-level operator in joining the VPP aggregation/disaggregation. Both designed schemes are scalable and do not need to measure or predict any exogenous disturbances such as the outdoor temperature and the heating disturbances from external sources, e.g., user activity and device operation. Finally, four numerical examples for the simulation of two different scenarios demonstrate the effectiveness of the proposed methods.