A5052783048- Fuel Cells and Related Materials
- Electrocatalysts for Energy Conversion
- Electric and Hybrid Vehicle Technologies
- Advancements in Solid Oxide Fuel Cells
- Refrigeration and Air Conditioning Technologies
- Membrane-based Ion Separation Techniques
- Advanced Battery Technologies Research
- Conducting polymers and applications
- Analytical Chemistry and Sensors
- Diamond and Carbon-based Materials Research
Tsinghua University
2020-2024
State Key Laboratory of Vehicle NVH and Safety Technology
2020
Reducing the channel/rib width is a possible approach to improve performance of fuel cells. However, few experiments were conducted verify this claim, especially for below 0.4 mm. In study, we quantitative analysis investigate influence geometries on cells through and model simulations. As reduced from 1.0 0.2 mm, cell power density increased by 31% under high humidity condition. The overpotentials has also been revealed. Notably, narrow channels/ribs can lead significant reduction in mass...
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Power density is one of the most significant bottlenecks vehicular polymer electrolyte membrane (PEM) fuel cell systems. In order to be suitable for commercial vehicles in future, high-power engines need developed. This paper presents an experimental study on a domestic engine. The test system consists 100-kW class stack, accessory subsystems, DC/DC converter and electronic load. A rated working condition cycle stipulated by national standard. Key parameters, e.g., current, voltage,...
To improve the volume power density of proton exchange membrane fuel cell (PEMFC), a design graphite bipolar plate straight channel characterized by narrow ribs is studied in this article. A three-dimensional multiphase model PEMFC employed to analyze effects geometric parameters on mass transfer characteristics and density. The results show that smaller width depth can enhance water removal gas transport, which could increase performance. However, influence diffusion layer (GDL) thickness...
Precise control of cathode pressure and flow rate is critical to the performance durability proton exchange membrane fuel cell systems. This study presents a model subsystem engines, degree air rate-pressure coupling in different working areas compressor analyzed. A decoupling algorithm based on active disturbance rejection then designed realize precise regulation rate. Finally, experiments are conducted domestic 80kW engine, effectiveness validated. The experimental results indicate that...
Water content is one of the most significant internal states which affects performance and durability proton exchange membrane fuel cells (PEMFCs).However, water inside difficult to be directly measured.This study aims at developing a new method fast estimate cells.We investigated relationship between exhaust back pressure cells, indicated that positively correlated with concentration.Then, two-step algorithm was proposed cells.Finally, this validated by high frequency resistance...