Buildings - Cool Smart Walls (IMAGE) DOE/Oak Ridge National Laboratory Caption ORNL researchers 3D printed a concrete wall embedded with a thermal storage and active insulation system that allows the wall to function as a cooling system. Credit ORNL, U.S. Dept. of Energy Usage Restrictions None License Licensed 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.