Towards Sustainable Heat Supply with Decentralized Multi-Energy Systems by Integration of Subsurface Seasonal Heat Storage

In the energy transition, multi-energy systems are crucial to reduce temporal, spatial and functional mismatch between sustainable supply demand. Technologies as power-to-heat (PtH) allow flexible effective utilisation of available surplus green electricity when integrated with seasonal heat storage options. However, insights methods for integration PtH in lacking. Therefore, this study, we developed improved control a high temperature aquifer thermal (HT-ATES) system within decentralized system. To end, expanded model numerical hydro-thermal dynamically simulate functioning several HT-ATES designs case study neighbourhood 2000 houses. Results show that allows 100% provision yearly demand, maximum 25% smaller pump than without HT-ATES. Success is partly caused by mode operation whereby lowers threshold HT-ATES, increases performance decreases overall costs production. Overall, shows suitable match annual demand supply, increase local use.