Evaluation on aquifer thermal energy utilization by using digital national land information

摘要

This study describes analyses on characteristics of Aquifer Thermal Energy Storage (ATES) by using digital national land information and system simulations and its feasibility considering the distribution of thermal energy demand. First, we made maps that show the distribution of underground characteristics in Sapporo by using a Geographic Information System (GIS) and hydrogeological information, and evaluations were carried out on the feasibility of ATES. Second, the heat recovery ratio of the seasonal thermal energy storage was calculated from the distribution of thickness of aquifers and the groundwater. Areas in which the heat recovery ratio exceeds 50% account for 41.5%. As a result of comparing the distribution of aquifer heat capacity with that of the thermal energy demand from administrative digital is formation and solar energy potential, it was clarified that the aquifers in Sapporo have sufficient capacity for space heating and cooling, mitigating the heat island and renewable energy storage.