Presentation on theme: "Wei Dai Technical Institute of Physics and Chemistry,"— Presentation transcript:
1 Electricity Generator and Other Research in Key Laboratory of Cryogenics of CAS Wei DaiTechnical Institute of Physics and Chemistry,Chinese Academy of Sciences，Beijing， China
2 Our group Prof. Ercang Luo and Wei Dai 5 other staff members The group members:Prof. Ercang Luo and Wei Dai5 other staff members>10 graduate studentsResearch Activity:Coolers based on thermoacoustic cycles, down to 20 KThermoacoustics engines and generators, from100We-3kWe, target bigger
19 Comparison of the model with RC load to measure output Computational and experimental data of the TASHE(4MPa helium,75Hz working frequency, 650℃ heating temperature )
20 When it comes to a linear alternator, frequency coupling between the system working frequency (dominated by the engine) and the natural frequency of the linear alternator (dominated by its spring stiffness, moving mass, piston area) is crucial to the system performance.
21 Changing the natural frequency of the linear alternator makes big difference ( adjusting the moving mass)6cm pistonThe system stops working in this natural frequency range.Computational results of power and pressure ratio as a function of the natural frequency of linear alternator (6cm piston diameter, 4.0 MPa helium, 650 oC heating temperature and 15 oC cooling water temperature).