it is expected that residential units may replace   traditional heat and power production systems with cogeneration ones. among the different cogeneration systems, fuel cell based systems are a suitable choice due to their high efficiency, high power density, low emission and low noise. in this paper, a cogeneration system based on solid oxide fuel cells is examined. the system, including the f...

Flow channel design on bipolar plates has a direct effect on Proton Exchange Membrane (PEM) fuel cell performance. It has been found out that the flow field design has a deterministic role on the mass transport and water management, and therefore on the achieved power in PEM Fuel cells. This study concentrates on improvements in the fuel cell performance through optimization of channel dimensio...

Fuel cells are one of the zero-emission elements modern automotive drive systems. This article presents theoretical identification component parameters indicators for fuel cell operating conditions. Activation, ohmic, and mass transport losses were identified. Current–voltage characteristics provided along with an analysis typical losses. The actual performance analyzed Toyota Mirai I II genera...

In situ, line-of-sight measurements of water vapor partial pressure and temperature were performed in a gas channel on the cathode side of an perating PEM fuel cell. Tunable diode laser absorption spectroscopy was employed for these measurements for which water transitions sensitive o temperature and partial pressure were utilized. The previously demonstrated methodology for water partial press...

This article is focused on the development of an energy management algorithm applied to a multi-stack fuel cell (FC) system for DC microgrid applications. To guarantee performance FC stacks, current ripple reduced by employing multiphase interleaved boost converters. A proposed advanced control technique with converters proton exchange membrane (PEM) FCs estimated based differential flatness ap...

Polymer Electrolyte Membrane (PEM) fuel cells incorporating microchannels (D<500 μm) can benefit from improved fuel delivery and convective cooling. However, this requires a better understanding of twophase microchannel transport phenomena, particularly liquid-gas interactions and liquid clogging in cathode air-delivery channels. This paper develops optical fluorescence imaging of water films i...