Air-cooled fuel cells: Keys to design and build the oxidant/cooling system

Abstract

In the field of energy, hydrogen as an energetic vector is becoming increasingly important. Specifically, fuel cells powered by hydrogen are becoming an alternative in automotive and other fields because of their ability to produce electricity without any pollution. Therefore, at this time there is a very active research field. A fuel cell can be described as a scale down industrial plant that consists of different subsystems whose purpose is to make the stack works properly. Air Cooled Polymer Electrolyte Fuel Cells (AC-PEFC) are receiving special attention due to their potential to integrate the oxidant and cooling subsystems into one, which in term gives the fuel cells their capability to reduce its weight, volume, cost and control complexity. In these fuel cells, the Oxidant/Cooling subsystem is of crucial importance and along with three others (Fuel, Electrical and Control subsystems) make up the Balance of Plant (BoP), which together with the stack comprise the full fuel cell system. The aim of this paper is to present a comprehensive experimental study of an AC-PEFC paying particular attention to the Oxidant/Cooling subsystem configuration. According to the scientific literature, this subsystem has not received the same attention as other subsystems like the Fuel and Control subsystems. However, a suitable design and size is critical for the proper functioning of the stack. The analysis carried out in this paper tries to solve some problems that can appear if the design of the Oxidant/Cooling subsystem has not been optimized. These problems are related to important aspects such as the performance and the efficiency of the whole system and temperature distribution over the stack.

Temperature Effects in Polymer Electrolyte Membrane Fuel Cells

“…Therefore, additional air-cooling can be achieved by passing air through flow channels, e. g., by a fan. [154,155,156,157] As for the liquid cooling, the design of the flow channels also plays an important role for air-cooling. [158] Alternatively, reactant supply and cooling circuit can be combined in a so-called 'open-cathode' configuration.…”

Cell and stack‐level study of steady‐state and transient behaviour of temperature uniformity of open‐cathode proton exchange membrane fuel cells

“…López-Sabirón et al 12 showed the infrared thermographic images of the surface of an air-forced open-cathode PEMFC stack. The work done by De las Heras et al 14 obtained infrared thermographic images of the surface of an air-forced open-cathode PEMFC stack. The study presented a brief temperature distribution of an air-forced open-cathode PEMFC stack; however, the temperature was not measured and analysed systematically.…”

“…The study presented a brief temperature distribution of an air-forced open-cathode PEMFC stack; however, the temperature was not measured and analysed systematically. The work done by De las Heras et al 14 obtained infrared thermographic images of the surface of an air-forced open-cathode PEMFC stack. They found that the maximum temperature difference was more significant with higher current.…”

Sistema híbrido inteligente para la predicción de la tensión de una pila de combustible basada en hidrógeno

“…Por ejemplo, en aplicaciones estacionarias, las pilas de combustible pueden conectarse a la red eléctrica (Moreira and da Silva, 2009), instalarse como generadores separados (Kirubakaran et al, 2009), u operar en vertederos y plantas de tratamiento de aguas residuales (Paska et al, 2009). Su uso también es interesante en aplicaciones de transporte, debido a la escasez de combustibles fósiles y sus escasos efectos contaminantes (Bertoluzzo and Buja, 2011;De las Heras et al, 2018b), o sobre otro tipo de estaciones móviles (Ross, 2003).…”