| Title | ATES Triplet Robustness for Varying Building Supply Temperatures |
|---|---|
| Authors | M.S. van Esch, E. Kükrer, N. Hartog, P.J. Vardon, R.P. Kramer, J.M. Bloemendal |
| Year | 2026 |
| Conference | World Geothermal Congress |
| Keywords | |
| Abstract | An Aquifer Thermal Energy Storage (ATES) triplet is a system that combines on-site renewable energy generation with a triple well ATES system. Passive heating and cooling are supplied from the ATES to reduce the electricity requirements, hence reducing CO2 emissions and grid dependency. Two of the three wells are required to supply energy, either for heating or for cooling. The third well is used to buffer thermal energy when the renewable energy generation is not (sufficiently) available after heating or cooling to inject into one of the supply wells. When generation allows water is extracted from the buffer to meet required charging into the supply wells. Since this system functions without demand based heating or cooling generation, it relies entirely on the stored energy in the ATES wells. Thermal degradation of the wells will reduce the ability to meet the heating and cooling demands. The building’s insulation level and required supply temperatures for the building’s systems greatly influence the required storage temperatures and accordingly impact the long-term performance of the wells. In this contribution the effects of variations in insulation levels and required temperature on hot well storage temperatures, as well as temperature degradation are assessed, focussing on to what extent the energy generation and well storage need to be over-dimensioned to achieve a robust working system and discuss other mitigation strategies to increase robustness. |