3D Fuel Cell Simulation for Cell Design and Prediction of Performance and Durability

Takayuki Tsukamoto･Tsutomu Takayama･Keisuke Komiyama･Ippei Tsujimura･Rui Sugawara (Mizuho Research & Technologies)

The target is PEMFCs intended for FCVs. For cell design, we have developed a tool to draw flow channels on 2D canvas and evaluate pressure drop and flow rate distribution. By using this tool, we investigated the optimal flow path design. In addition, we evaluated power generation performance and degradation of the platinum catalyst under dynamic operating conditions by 3D fuel cell simulation.

Effect of high temperature operating conditions on single cell evaluation of PEFC

Ken Kagaya (HORIBA)･Hiroyuki Kanesaka (FC-Cubic TRA)･Tomokazu Sakai (Toyota Motor)･Hiroki Kusakabe (FC-Cubic TRA)

Membrane electrode assemblies (MEAs) with several specifications were characterized at elevated temperatures exceeding 120°C. For all MEA specifications, the degradation of the electrolyte membrane accelerated at higher temperatures and lower humidity levels. In the load cycle endurance evaluations, performance degradation intensified with increased temperatures and humidity.

Comparison of multi-fuel cylinder head concepts for heavy duty engine running on alternative fuels with Charge Motion Design (CMD) process

Avnish Jagdeesh Dhongde･Lukas Virnich･Max Mally･Bastian Morcinkowski (FEV Europe)･Dieter van der Put (FEV Group GmbH)･Moritz Lueckerath･Li Zhengling (TME, RWTH Aachen University)

Charge Motion Design process optimizes the design for multi-fuel cylinder heads using CFD simulations, benchmarks and burn duration correlations. These correlations are calibrated to engine data for individual fuels to yield the 0 to 50 % burn duration by analyzing the flow and turbulence in the combustion chamber. The calibration of these correlations to test data from ammonia and hydrogen blends is presented. The calibrated correlations for ammonia, hydrogen, natural gas and methanol were applied to different configurations to assess their performance and suitability for these fuels. These configurations varied in the port layout, valve orientation and charge motion.

H2 Internal Combustion Engines for Commercial Vehicles
-Increasing Power Density by Low Pressure Direct Injection-

Martin Weber･Nils Bronder･Thomas Kemski･Hein Beier･Axel Seiffert･Lorenz von Roemer (IAV)･Florian Sobek (Fraunhofer Institut)･Hubertus Christian Ulmer･Thaddaeus Delebinski (IAV)

For Commercial Vehicles, H2 Internal Combustion Engines (ICE), are of growing interest due to zero emission regulations. Within the framework of the joint project WaVe, studies were conducted on a 1.3 l H2 single-cylinder test engine. Port fuel injection (PFI) and low pressure direct injection (LP-DI) were investigated.
Focus was to achieve or even exceed the indicated mean pressure of a diesel engine at high thermal efficiency. Since mixture preparation is crucial and challenging, IAV designed spray caps for an LP-DI injector via 3D-CFD simulation. Further investigations focused on the optimization of the spark plug and the introduction of EGR.

Development of Compact Fuel Cell System with Water Cooling

Yuta Ichigo･Akihiro Inukai･Kasumi Nakajima･Akifumi Tsujimura･Kensuke Doi･Yasunari Arai (Toyota Boshoku)

We are developing a compact water-cooled fuel cell system for small mobility applications. In this presentation, we will introduce the power generation principles of water-cooled compact FC stack and the overview of the FC separator, the overview of the FC separatorfuel cell system, the details of the thermal management system, the results of the driving tests by an electric assist bicycle equipped with our system.