Aquifer thermal energy storage systems (IMAGE) Karlsruher Institut für Technologie (KIT) Caption Cooling in summer (left) and heating in winter: Aquifer thermal energy storage systems, i.e. underground water-bearing layers, are suited for this purpose. (Graphics: Ruben Stemmle, AGW/KIT) Credit Ruben Stemmle, AGW/KIT Usage Restrictions The photo may be used in the context given above exclusively License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.