Longwen Ou is an Energy Systems Analyst at Argonne National Laboratory. His research involves life-cycle analysis of various energy systems, including biodiesel and renewable diesel production, conventional waste management, and waste-to-energy technologies. Longwen is a developer of Argonne’s Greenhouse gases, Regulated Emissions, and Energy use in Technologies (GREET) Model. He also develops GREET-based web apps to stream life-cycle analysis of innovative energy technologies.

Longwen earned a Ph.D. degree in Mechanical Engineering from Iowa State University.