| Title | Fully Downhole Heat Exchange System on Utilization of Medium-Deep Geothermal Energy |
|---|---|
| Authors | Ke Wang |
| Year | 2026 |
| Conference | World Geothermal Congress |
| Keywords | Medium-deep geothermal energy, Fully downhole heat exchange system, Downhole heat exchangers, Downhole submersible pumps |
| Abstract | The utilization of medium-deep geothermal energy has attracted international community since its prospect in the global energy structure transformation and advantage of cleanness and stableness. Heat exchange system has increasingly become an efficient way to develop and utilize medium-deep geothermal energy. However, its popularize applications have been limited in some regions in China due to some strict policies on groundwater and geothermal resources. In order to overcome these limitations and promote the widespread use of heat exchange system, we propose an innovative fully downhole heat exchange system integrating optimized downhole heat exchangers, downhole submersible pumps as well as some enhanced thermal conductivity materials. The features of our proposed system include fetching heat but no water, groundwater staying only underground without coming out of the ground surface, guaranteeing no loss of heat transfer efficiency. This fully downhole heat exchange system paves a way for large-scale deployment of medium-deep geothermal resources, contributing to global decarbonization goals with minimal land use and carbon emissions. |