| Authors: |
Stefan KRANZ, Guido BLOECHER, Ali SAADAT |
| Keywords: |
aquifer thermal energy storage, ATES, system design, heat supply, system optimization |
| Conference: |
World Geothermal Congress |
Session: |
Integrated Energy Systems, Cascaded Uses |
| Year: |
2015 |
Language: |
English |
| Abstract: |
Aquifer thermal energy storage systems play an important role for the future energy supply systems. Such systems can decouple energy availability (e.g. fluctuating renewable energy, waste heat) and energy supply in times of demand. In order to fully contribute to the sustainability of energy supply, the essential requirements of energy storages are high energy efficiency, high reliability, cost effectiveness, as well as operational flexibility. Aquifer Thermal Energy Storage Systems (ATES) meet all these requirements and additionally offer a large potential. Various ATES projects have been realized, for example in the Netherlands or Sweden. Based on the comprehensive knowledge from R&D activities as well as operational experience it is known which factors generally affect storage efficiency and reliability: the hydrogeological conditions, the temperature level at which the storage is operated, and the amount of energy charged and discharged. Despite the extensive experiences made, there are still significant potentials for improving their energy efficiency. In this paper it is shown how a significant increase in supply system efficiency and thus a wider application of ATES can be achieved at different site conditions by an optimized storage design and storage operation strategy. The results presented base on operating experience of an existing ATES as well as on numerical simulation studies. |
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File Size: |
533 KB |