Julian D. Osorio is a research engineer in the Energy Conversion and Storage Systems Center at NREL. Previously, he was an intern at the Idaho National Laboratory (INL) doing research related with concentrated solar supercritical carbon dioxide cycles thermal–electrical co-simulation, and materials for solar energy applications. He returned to Colombia and joined the University of Medellin as a full-time professor from January 2017 to November 2018, where he taught thermodynamics, power generation cycles, heat transfer, and renewable energy seminars courses. From November 2018 to July 2019, he worked as a postdoctoral research associate at INL. He joined NREL in July 2019, where he is working as a research engineer.

Research Interests

Modeling and optimization of hybrid energy systems

Thermal–electrical co-simulation in real time environment

Integration of renewable energy technologies into the grid


Ph.D., Mechanical Engineering, Florida State University

M.S., Materials Engineering and Processes, National University of Colombia

B.S., Mechanical Engineering, National University of Colombia

Professional Experience

Dynamic and Transient Analysis Research Engineer, NREL (2019–present)

Idaho National Laboratory:

Postdoctoral Research Associate, Power, and Energy Systems (2018–2019)

Intern, Modeling of sCO2 Concentrated Solar Power Plants (2015-2016)

University of Medellín (2017–2018):

Professor, Thermodynamics

Professor, Renewable Energy Seminar II and III

Professor, Power Cycles

National University of Colombia:

Professor, Heat Transfer (2017–2018)

Professor, Introduction to Mechanical Engineering (2016)

Professor, Manufacturing Processes (2016)

Featured Work

Forecasting Solar-Thermal Systems Performance Under Transient Operation Using a Data-Driven Machine Learning Approach Based on the Deep Operator Network Architecture, Energy Conversion and Management (2022)

Influence of the Concentration Ratio on the Thermal and Economic Performance of Parabolic Through Collectors, Renewable Energy (2022)

Thermodynamic Modeling of Heat Engines Including Heat Transfer and Compression-Expansion Irreversibilities, ASME Journal of Thermal Science and Engineering Applications (2022)

Grid-Scale Ternary-Pumped Thermal Electricity Storage for Flexible Operation of Nuclear Power Generation under High Penetration of Renewable Energy Sources, Energies (2021)

Enabling Thermal Efficiency Improvement and Waste Heat Recovery Using Liquid Air Harnessed From Offshore Renewable Energy Sources, Applied Energy (2020)

Comparative Analysis of Natural Gas Cogeneration Incentives on Electricity Production in Latin America, Energy Policy (2020)

Leveraging National Laboratory Assets to Address Stability Challenges due to Declining Grid Inertia Using Geographically Distributed Electrical–Thermal Co-Emulation, ASME Journal of Energy Resources Technology (2020)

Predicting the Slope of the Temperature−Entropy Vapor Saturation Curve for Working Fluid Selection Based on Lee−Kesler Modeling, Industrial & Engineering Chemistry Research (2020)

Performance Analysis of Parabolic Trough Collectors with Double Glass Envelope, Renewable Energy (2019)

Efficiency Enhancement of Spark-Ignition Engines Using a Continuous Variable Valve Timing System for Load Control, Energy (2018)

Awards and Honors

Alliance for Sustainable Energy President’s Award for Exceptional Performance (2022)

NREL Mechanical & Thermal Science Directorate Key Contributor Award (2021)

Idaho National Laboratory Exceptional Contribution Award (2019)