Modeling and Simulation of Solar-assisted Dual-source Heat Pump System With Underground Thermal Storage for Space Heating and Cooling

Abstract

The adoption of renewable energy, such as solar, to meet the energy demand in buildings has become one of the keys to achieving the global target for net-zero emissions. As a result, solar photovoltaic installations have increased tremendously, giving rise to an enormous redundancy of electricity generation. This has become an issue requiring alternative ways to be addressed. Underground thermal energy storage (UTES) for power-to-heat operations has gained interest in this area due to its reliability, cost-effectiveness, and carbon-free nature. However, UTES systems face challenges of thermal losses requiring improvement through thermal insulation of the storage volumes. This solution is yet to be applied in developing and evaluating inverse-grey-box (IGB) models for application in water heating and building space conditioning. The goal of this study was to model and simulate a solar-assisted dual-source heat pump system combined with UTES for application in water heating, space heating, and space cooling...