A5083563865- Advanced Thermodynamic Systems and Engines
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Advanced Thermodynamics and Statistical Mechanics
- Refrigeration and Air Conditioning Technologies
- Photovoltaic System Optimization Techniques
- Heat transfer and supercritical fluids
- Wind and Air Flow Studies
- Probabilistic and Robust Engineering Design
- Heat Transfer and Boiling Studies
- Geomechanics and Mining Engineering
- Solar Thermal and Photovoltaic Systems
- Engineering Applied Research
- Wind Energy Research and Development
Lanzhou University of Technology
2021-2024
ABSTRACT The introduction of a pneumatic supporting system composed gas springs and hydrostatic bearings in the free‐piston Stirling generator (FPSG) can effectively increase power density nuclear space plant. In this paper, 1 kW FPSG with was developed, working characteristics dual were obtained under an external driving condition. A quasi‐one‐dimensional numerical model is established, relative error between piston strokes within 5%, maximum phase uncertainty 5.36° experimental results....
Free piston Stirling generator (FPSG) has been focused increasingly as energy conversion device for space nuclear power plants due to its long life and maintenance-free characteristics. For the purpose of predicting operating characteristics describing inherent mechanisms FPSG, experiments have conducted based on a 1 kW prototype. Pressure fluctuations, pistons' displacements, phase angle between displacer piston, hot cold end temperatures, etc. were obtained during experiments. Moreover,...
Abstract The effects of sampling frequency on the efficacy POD technique for reconstructing flow field a wind turbine wake are studied in neutral atmospheric boundary layer (ABL) using large eddy simulations (LES) coupled with an actuator disk model. objective this paper is to study how over fixed period time affects modes. results showed that has little influence convergence modes and extraction large‐scale coherent structures. Meanwhile, negligible kinetic energy contained each mode first...
Abstract This study presents a thermodynamic–dynamic model of free‐piston Stirling engine (FPSE) with nonlinear coefficients spring, load damping, and pressure for working spaces. The effects the hardening softening springs on movement operating frequency displacer piston are investigated. Subsequently, influences terms space buffer spaces, as well amplitudes two pistons, frequency, output powers discussed. results indicate that low spring have minor effect frequency. As high increase, power...
The pneumatic supporting system consisting of gas springs and self-charged hydrostatic bearings can suppress vibrations improve durability free piston Stirling engines. In this paper, a generator with on the displacer was developed based prototype plated spring scheme. A series experiments were carried out to evaluate impacts self-charging bearing performance springs. During experiments, linear alternator applied an external AC power supply pressure fluctuations in working chamber ensured be...
The rapid performance improvement of photovoltaic/thermal (PV/T) implies great potential application to various aspects society. previously developed micro heat pipe PV/T (MHP-PV/T) has shown favorable cogeneration electricity and in cold regions (Li et al. 2022), while it is badly needed improve its comprehensive by enhancement transfer. For same working fluid as HCFC141b pipe, higher Reynolds Number (Re) theoretically means better Therefore, two available pipes were with trapezoidal cross...