Energy and Climate

Brayton cycle

Mechanical Testing

On March 26, 2014, in

Mechanical Testing Overview  ASTM standard (E8) used for tension testing guidance, with tests in constant displacement mode 2 tests were performed, room temperature and at 650°C Post mortem metallography was performed on both samples Room Temperature Tensile Test  Room Temperature Metallography Voids were observed in bond lines away from fracture surface. Unclear if voids were […]

Diffusion Bonding Characterization

On March 26, 2014, in

Diffusion Bond Characterization  Research Goal:  Diffusion bond strength, defects, and corrosion behavior must be understood before they can be reliably used in reactor systems.              Diffusion Bond Process Plates were chemically cleaned and electroplated with nickel to prevent surface oxidation which would impair bonding process Actual process variables are proprietary […]

Heat Exchanger Development

On March 26, 2014, in

Planned Heat Exchanger Test Loop Capabilities 500 kW Heaters (Elec.) 500 kW Gas Cooler Unbalanced flows Dedicated system accepts novel mixtures and additives Facility Goal: Provide testing capability for 1 MW-scale commercial and prototype heat exchangers used at any position in current and future Brayton layouts Path Forward to Commercialization What we are going to […]

Nuclear Energy Systems Laboratory (NESL) / Brayton Lab

On June 5, 2012, in

Sandia National Labs has established the Nuclear Energy Systems Laboratory (NESL) / Brayton Lab to research and develop closed Brayton cycle (CBC) technology for highly efficient thermal-to-electric power conversion.  While CBC’s have generated power since 1939 using air as the working fluid, the testing at Sandia’s Brayton Lab uses supercritical carbon dioxide (SCO2) in a […]

Sandia’s Brayton-Cycle Turbine Boosts Small Nuclear Reactor Efficiency

Sandia National Laboratories is seeking an industry partner to market a turbine system that could substantially improve energy efficiency in small modular nuclear reactors. The system uses carbon dioxide in a closed-loop “Brayton-cycle” turbine to crank up electric conversion from heat, said Gary Rochau, manager of the advanced nuclear concepts group at Sandia’s Nuclear Energy […]