Research on design method of a medium-depth geothermal heat pump energy storage system for clean electric utilization

The electric-driven heat pump technology is commonly applied for space heating and cooling for buildings, and also becomes the key link for cooperation with power grid to consume clean electricity. This paper proposes a high-efficiency heating and cooling system by combining the electric-driven heat pump technology with the medium-depth ground heat exchanger for heating in winter and the cooling tower for cooling in summer. Then the user-side energy storage system is applied for daily heat and cool storage. With this system, the design method and control strategy are proposed to fully absorb the local photovoltaic power generation and municipal clean power. Furthermore, this paper conducts a case study on a large public building with quantitative analysis, so as to analyse the actual energy-saving and CO2emission reduction effect.