| Title | Optimisation of ATES in conjunction with E-grid in integrated heating systems |
|---|---|
| Authors | Amirhossein Hashemi, Martin Bloemendal, Philip J Vardon |
| Year | 2026 |
| Conference | World Geothermal Congress |
| Keywords | |
| Abstract | The heat transition in space heating is leading to increased electrification through the use of heat pumps, which increases peak loads in winter. This grid congestion can be reduced by producing heat at times when sustainable electricity is available, and storing heat in the subsurface so that it can be recovered and used with minimal primary energy use when there is demand. When using heating with Aquifer Thermal Energy Storage (ATES) it is crucial to ensure efficiency and capacity by stabilizing the temperature levels from the ATES. This is especially important given the variability in return temperatures and the fluctuations in building demand. The desired storage temperature level in the subsurface is the temperature needed for delivery to low-temperature supply systems. A storage temperature of approximately 40°C to 50°C is assumed. To enable as much passive heating and cooling as possible, it is necessary to develop design and control concepts that can handle variations in demand and losses in subsurface, enabling long-term and efficient passive heating/cooling. This contribution presents partial results from research into: 1.Under what conditions, it is necessary to apply multiple ATES-wells at different temperature levels, and how this contributes to the energy performance and operation of the system. 2.The extent to which short-cyclic use of the ATES-wells contributes, and how this should be considered in the planning of wells to make optimal use of the available underground space. |