A5038935529- Turbomachinery Performance and Optimization
- Advanced DC-DC Converters
- Multilevel Inverters and Converters
- Refrigeration and Air Conditioning Technologies
- Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Fluid Dynamics and Turbulent Flows
- Phase Equilibria and Thermodynamics
- Photovoltaic System Optimization Techniques
- Heat Transfer Mechanisms
- Combustion and flame dynamics
- Industrial Technology and Control Systems
- Wave and Wind Energy Systems
- Enhanced Oil Recovery Techniques
- Fluid Dynamics and Vibration Analysis
- Computational Fluid Dynamics and Aerodynamics
- Advanced Battery Technologies Research
- Tribology and Lubrication Engineering
- Hydrocarbon exploration and reservoir analysis
- Advanced Thermodynamic Systems and Engines
- Carbon Dioxide Capture Technologies
- Heat transfer and supercritical fluids
- Enzyme Catalysis and Immobilization
- Microbial bioremediation and biosurfactants
- Induction Heating and Inverter Technology
- solar cell performance optimization
Northwestern Polytechnical University
2011-2025
North China Electric Power University
2021-2025
Institute of Engineering Thermophysics
2019-2023
Chinese Academy of Sciences
2020-2023
Xi'an University of Science and Technology
2023
Jiangnan University
2017-2018
University of California, Irvine
2014-2015
Beijing Institute of Technology
2015
Jianghan University
2012
Second Hospital of Liaohe Oilfield
2008-2009
Centrifugal compressors play a crucial role in energy and power systems, compressor surge significantly impact their safe operation. Monitoring typical inception characteristics can effectively serve as an early warning indicator, thereby enhancing safety. This paper presents the results of acoustic experiment conducted on centrifugal setup. Four microphones were positioned front inlet to record noise emitted entered its region from near-surge state. An entropy-based method is proposed...
Family of single-phase single-stage bridgeless power factor correctors based on tapped-inductor buck-boost converters is introduced. The converters' family has the merits reduced component count and alleviated losses in conduction path. feasibility proposed topologies was verified by simulation experimental results.
Surge poses a significant challenge to the safe operation of compressors. Identifying surge precursors is valuable approach for warning and has been extensively investigated, though it remains unresolved. This paper experimentally examines flow unsteadiness in centrifugal axial subsonic compressor setups. To quantitatively assess identify precursors, approximate entropy (ApEn) applied pressure sound signals. The signals are collected under two operating conditions: (1) stable points, where...
This paper introduces a high-gain single-stage boosting inverter (SSBI) for alternative energy generation. As compared to the traditional two-stage approach, SSBI has simpler topology and lower component count. One cycle control was employed generate ac voltage output. presents theoretical analysis, simulation experimental results obtained from 200 W prototype. The reveal that proposed can achieve high dc input boosting, good dc-ac power decoupling, quality of output waveform, conversion efficiency.
The stable range of operation for the centrifugal compressor significantly influences dynamic, economic, and environment-friendly characteristics power systems. A deep understanding instability evolution is necessary to improve stability. equipped with a vaneless diffuser experimentally investigated using high-response static-pressure measurements. results obtained indicate that three typical rotational-speed ranges exist based on different characteristics, which reveals various...
Surge waves are commonly modeled as one-dimensional plane in the understanding of compressor surge. However, this assumption does not adequately represent physical phenomena observed under specific conditions. This study performed surge experiments on a centrifugal compressor, measuring pressure changes around onset with fast dynamic transducers arranged at same impeller inlet section but different circumferential positions. The signals analyzed by Hilbert–Huang transform, ensemble empirical...
The dual-ported shroud casing has two ports over the impeller section in a centrifugal compressor, different from traditional ported casing. This paper uses numerical simulations and experiments to investigate effects of on including aerodynamic performance aeroacoustics. According experimentally measured compressor map, novel finding is that dual-port treatment extends operating range by improving instability margin increasing choke flow capacity. mechanism contributing capacity increase...
Input parallel output series Quasi-Z-source dc-dc converter is a promising option for fuel cell electrical vehicle applications its features of low device stress and high voltage ratio. Besides, the interleaved structure can reduce input current ripple which extend lifespan system. In order to achieve better dynamic steady-state performance converter, novel smooth super-twisting sliding mode control (STSMC) method designed in this article. The proposed strategy realized by constructing...
Schizochytrium sp. AB-610 accumulates relatively higher amount of DHA-rich lipid in the cells, and it was found that DHA yield closely related to cell morphology pH value during fermentation period. production from fed-batch investigated four growth stages were clarified as lag stage, balanced accumulation turnover based on morphologic observation key parameters changes. Then a simple strategy two-stage control developed, which 7.0 kept until 12 h after end then shifted 5.0 for rest period...
A cascade control scheme is constructed combing a model predictive (MPC) as current-mode controller with an Extended Kalman observer to interleaved DC-DC boost converter under load and input voltage step change conditions. state-space average established linearized near the stable point for predicting future dynamic behavior. The process of solving optimization problems constraints cost function converted quadratic programming problem. An designed obtain resistance variation integrated error...
A combined power conversion system, which consists of a supercritical carbon dioxide recompression cycle with an organic Rankine as the bottoming cycle, has broad potential for maritime propulsion applications. However, performance system under off-design condition and operating states compressors wide range load variations different control strategies have not been comprehensively investigated. Therefore, simulation model conditions is established in present study to investigate strategies....
This paper introduces a family of single-stage buck-boost DC/AC inverters for photovoltaic (PV) applications. The high-gain feature was attained by applying multi-winding tapped inductor, and thus, the proposed topologies can generate grid-level AC output voltage without using additional high step-up stages. had low component count consisted single magnetic device three or four power switches. Moreover, switches were assembled in push-pull half/full-bridge arrangement, which allowed...