STEP DEMO PILOT PLANT (IMAGE) Southwest Research Institute Caption Southwest Research Institute, GTI Energy, GE Global Research and the U.S. DOE National Energy Technology Laboratory celebrated the completion of the STEP Demo 10 MWe sCO2 pilot plant, which began construction on SwRI’s San Antonio headquarters in 2018. The $155 million, 10-megawatt supercritical carbon dioxide (sCO2) test facility will demonstrate the next generation of higher-efficiency, lower-cost electric power technology. Credit Southwest Research Institute Usage Restrictions Images/Videos may be used by the public for educational and informational purposes only. 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.