Development of the Fuel Cell System in the Mirai FCV

Hasegawa, T.; Imanishi, Hiroyuki; Nada, Mitsuhiro; Ikogi, Yoshihiro

doi:10.4271/2016-01-1185

Cited by 67 publications

(26 citation statements)

References 2 publications

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“…They showed that the counter-flow operation is particularly advantageous for internal humidification compared to a coflow operation. Hasegawa et al [26] described the advantage of a high anode recirculation for humidification of the cells. These studies focused on the impacts on the voltage.…”

Section: Scientific Approachmentioning

confidence: 99%

Water Management of PEM Fuel Cell Systems Based on the Humidity Distribution in the Anode Gas Channels

et al. 2020

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A proper water management is important for an efficient operation of a polymer electrolyte membrane (PEM) fuel cell system. The humidity distribution in the anode gas channels is highly dependent on the cathode humidity and the resulting transmembrane water transport. Therefore, it can be assumed that the cell humidification is optimal when the relative anode humidity is nearly 100% and homogeneously distributed. In contrast to state‐of‐the‐art approaches, this study focuses on the humidity distribution on anode side in consideration of the anode recirculation loop. Therefore, a macroscopic 1D+1D simulation model was developed, which simulates humidity profiles along the gas channels with consideration of the transmembrane water transport and the anode gas recirculation. This study shows the impact of relevant input parameters, such as pressure, stoichiometry and cathode inlet humidity. Furthermore, the results show that it is possible to reach a nearly homogeneous humidity distribution along the anode gas channels for automotive fuel cell systems. This can be achieved through appropriate operation conditions, e.g., suitable combination of pressure and stoichiometry, and supportive flow directions of the gases and the coolant. The analysis was made for fuel cells operating at full load at system relevant conditions with and without external humidification.

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Section: Scientific Approachmentioning

confidence: 99%

Water Management of PEM Fuel Cell Systems Based on the Humidity Distribution in the Anode Gas Channels

et al. 2020

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“…The empirical coefficients (C, A, g, e, k, j) used in Equation (7) for calculation of MC are obtained from the confirmation test performed on type IV tank for fill time longer 3 minutes. 31 Where C represents minimum heat capacity for filling time, A initial fill conditions and precooling amount.…”

Section: Heat Capacity Modelmentioning

confidence: 99%

“…With high energy content and zero greenhouse gas emission, H 2 is considered as a potential fuel for the development of sustainable transportation . Commercial, automotive manufacturers such as Toyota, Honda, BMW, and Hyundai have come forward with their hydrogen fuel cell vehicles (H‐FCV) . Many technical challenges such as efficient storage, safer refueling, and higher driving range are major barriers for market acceptability of H‐FCV .…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4] Commercial, automotive manufacturers such as Toyota, Honda, BMW, and Hyundai have come forward with their hydrogen fuel cell vehicles (H-FCV). [5][6][7] Many technical challenges such as efficient storage, safer refueling, and higher driving range are major barriers for market acceptability of H-FCV. 8,9 In this regard, compressed H 2 storage seems to be promising if high storage capacity for driving range of 300 miles can be achieved.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of compressed hydrogen refueling process of 60 L type IV tank used in fuel cell vehicles

et al. 2019

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Hydrogen fuel cell vehicle provides the significant advantage of high energy conversion efficiency and zero emission. Efficient hydrogen storage methods are vital for successful implementation of the hydrogen‐related technologies. Compressed hydrogen storage has been considered as a promising option in recently commercialized hydrogen fuel cell vehicles. The short filling time and high state of charge of compressed hydrogen storage tank are an essential requirement for fuel cell vehicles. This study presents the detail investigation of refueling compressed storage tank using computational fluid dynamics simulation and heat capacity model. The goal of the simulation is to identify the end temperature and state of charge. Initially, the mathematical model of end temperature and state charge is formulated. Later, the overall heat transfer involved in the refueling process is investigated by heat capacity model based on MC method defined by SAE J2601. The density obtains from the simulation is compared with the National Institute of Standards and Technology database. The SE in simulated results for the state of charge is reduced to <1% after applying the heat capacity method. The results may shade light on better understanding the refueling process of compressed hydrogen storage for fuel cell vehicle.

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“…As seen in Table 2, centrifugal and Roots compressors are the most suitable for fuel cell application [28][29][30][31][32]. They are smaller and cheaper than screw and scroll compressors, and help to reduce the weight and the cost of PEMFCs vehicle, which is already increased by the use of platinum.…”

Section: Boosting Options For Pemfcsmentioning

confidence: 99%

An Evaluation of Turbocharging and Supercharging Options for High-Efficiency Fuel Cell Electric Vehicles

et al. 2018

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Mass-produced, off-the-shelf automotive air compressors cannot be directly used for boosting a fuel cell vehicle (FCV) application in the same way that they are used in internal combustion engines, since the requirements are different. These include a high pressure ratio, a low mass flow rate, a high efficiency requirement, and a compact size. From the established fuel cell types, the most promising for application in passenger cars or light commercial vehicle applications is the proton exchange membrane fuel cell (PEMFC), operating at around 80 °C. In this case, an electric-assisted turbocharger (E-turbocharger) and electric supercharger (single or two-stage) are more suitable than screw and scroll compressors. In order to determine which type of these boosting options is the most suitable for FCV application and assess their individual merits, a co-simulation of FCV powertrains between GT-SUITE and MATLAB/SIMULINK is realised to compare vehicle performance on the Worldwide Harmonised Light Vehicle Test Procedure (WLTP) driving cycle. The results showed that the vehicle equipped with an E-turbocharger had higher performance than the vehicle equipped with a two-stage compressor in the aspects of electric system efficiency (+1.6%) and driving range (+3.7%); however, for the same maximal output power, the vehicle’s stack was 12.5% heavier and larger. Then, due to the existence of the turbine, the E-turbocharger led to higher performance than the single-stage compressor for the same stack size. The solid oxide fuel cell is also promising for transportation application, especially for a use as range extender. The results show that a 24-kWh electric vehicle can increase its driving range by 252% due to a 5 kW solid oxide fuel cell (SOFC) stack and a gas turbine recovery system. The WLTP driving range depends on the charge cycle, but with a pure hydrogen tank of 6.2 kg, the vehicle can reach more than 600 km.

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Development of the Fuel Cell System in the Mirai FCV

Cited by 67 publications

References 2 publications

Water Management of PEM Fuel Cell Systems Based on the Humidity Distribution in the Anode Gas Channels

Water Management of PEM Fuel Cell Systems Based on the Humidity Distribution in the Anode Gas Channels

Investigation of compressed hydrogen refueling process of 60 L type IV tank used in fuel cell vehicles

An Evaluation of Turbocharging and Supercharging Options for High-Efficiency Fuel Cell Electric Vehicles

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