Abstract: A power generation system includes a turbine having an outlet. A high temperature recuperator has an inlet and is connected to the turbine outlet. A low temperature recuperator is connected to the high temperature recuperator. Each of the high and low temperature recuperators include a plurality of matrix panels interconnected together that define hot fluid channels and cold fluid channels arranged adjacent to each other in a counterflow and stair-step configuration. A compressor is connected to the low temperature recuperator and turbine.

Abstract: A power generation system includes a turbine having an outlet. A high temperature recuperator has an inlet and is connected to the turbine outlet. A low temperature recuperator is connected to the high temperature recuperator. Each of the high and low temperature recuperators include a plurality of matrix panels interconnected together that define hot fluid channels and cold fluid channels arranged adjacent to each other in a counterflow and stair-step configuration. A compressor is connected to the low temperature recuperator and turbine.

Abstract: A heat transfer augmented channel wall includes a bulk portion, a wall surface and a plurality of multi-portion indented features extending from the wall surface into the bulk portion. The multi-portion indented features include a first indented portion and a second indented portion that are divided by a ridge which disrupts fluid flow between first and second indented portions. The ridge has a height that is less than a maximum depth of the multi-portion indented features.

Abstract: A heat transfer augmented channel wall includes a bulk portion, a wall surface and a plurality of multi-portion indented features extending from the wall surface into the bulk portion. The multi-portion indented features include a first indented portion and a second indented portion that are divided by a ridge which disrupts fluid flow between first and second indented portions. The ridge has a height that is less than a maximum depth of the multi-portion indented features.

Abstract: A high speed centrifugal compressor for compressing fluids includes a permanent magnet synchronous motor (PMSM) having a hollow shaft, the being supported on its ends by ball bearing supports. A permanent magnet core is embedded inside the shaft. A stator with a winding is located radially outward of the shaft. The PMSM includes a rotor including at least one impeller secured to the shaft or integrated with the shaft as a single piece. The rotor is a high rigidity rotor providing a bending mode speed of at least 100,000 RPM which advantageously permits implementation of relatively low-cost ball bearing supports.

Abstract: Novel micro electro mechanical systems (MEMS)-based sensors for use in ultra-high temperature environments are disclosed. The MEMS-based sensors are derived from a class of polymer-derived ceramics selected from the group consisting of SiCN, SiBCN and SiAlCN. The materials of construction are such that, the sensors are capable of accurate, real-time, on-line and in-situ monitoring, suppression of combustion oscillations and detailed measurements in operating structures that have temperatures of from about 1500° K to about 2000° K, extreme pressures/turbulence and harsh chemical off gases. When the novel sensors are mounted on a hot gas path wall, such as, at a combustor exit, there can be a continuous monitoring of pressure pulses/oscillations, wall shear stress, temperature and surface heat flux.

Abstract: A high speed centrifugal compressor for compressing fluids includes a permanent magnet synchronous motor (PMSM) having a hollow shaft, the being supported on its ends by ball bearing comprising supports. A permanent magnet core is embedded inside the shaft. A stator with a winding is located radially outward of the shaft. The PMSM includes a rotor including at least one impeller secured to the shaft or integrated with the shaft as a single piece. The rotor is a high rigidity rotor providing a bending mode speed of at least 100,000 RPM which advantageously permits implementation of relatively low-cost ball bearing comprising supports.