Woodruff School of Mechanical Engineering

Guest Speaker


Supercritical CO2 Power Cycles: Using a Greenhouse Gas to Reduce or Eliminate Emissions in Power Generation


Dr. Tim Allison


Southwest Research Institute


Thursday, March 12, 2020 at 11:00:00 AM


MRDC Building, Room 4211


Devesh Ranjan


Brayton cycles that use high-pressure supercritical carbon dioxide (sCO2) have shown the potential for significant efficiency and power density improvements over steam Rankine cycle or natural gas combined cycle power plants. These cycles are also applicable to many heat sources, including concentrating solar, geothermal, nuclear, waste heat, and fossil fuels. This seminar introduces the concept of sCO2 power cycles and describes various technology development projects that have been completed at Southwest Research Institute to encourage commercialization, including turbomachinery design and testing, seal development, heat exchanger development, combustion modeling, and MW-scale validation testing.


Dr. Tim Allison is the Machinery Department Director at Southwest Research Institute where he leads an organization that focuses on R&D for the energy industry. His research experience includes analysis, fabrication, and testing of turbomachinery and systems for advanced power or oil & gas applications including high-pressure turbomachinery, centrifugal compressors, expanders, gas turbines, reciprocating compressors, and test rigs for bearings, seals, blade dynamics, and aerodynamic performance. Dr. Allison holds two patents, has authored two book chapters, and has published over 70 articles on various turbomachinery topics. He received the best tutorial/paper awards from the ASME Oil & Gas and Supercritical CO2 Power Cycle Committees in 2010, 2014, 2015, and 2018. He is a past chairman of the ASME Oil & Gas Applications Committee, a member of the Supercritical CO2 Symposium and Thermal-Chemical-Mechanical Energy Storage Workshop Advisory Committees, and an Associate Editor for the ASME Journal of Engineering for Gas Turbines & Power