Effect of Cold Energy Storage of single-well Aquifer Thermal Energy Storage in Sanhejian Coal Mine

摘要

Effective implementation of technology of aquifer thermal energy storage(ATES) must form a "ground cold water reservoir" or "ground warm reservoir". In this paper, taking Sanhejian Coal Mine as an example, we analyze the effect of cold energy storage in single-well by analyzing the volume change of cold water body within different temperature ranges. Through the analysis of volume change of cold water body, it can prove that with the same irrigation temperature, the increase of irrigation flow makes the volume and percentage of cold water body in aquifer within different temperature ranges. And the impact on the cold water of 2-5°C is more obvious. With the same irrigation flow, both the cold water body and its percentage of 2-10°C in the condition of 2°C irrigation temperature are more than those in the condition of 5°C. The increase of irrigation flow and the decrease of irrigation temperature are beneficial to cold energy storage, and the effect of cold energy storage of the condition 3 (100m~3/h irrigation flow and 2°C irrigation temperature) is the best in these four conditions.