Naslov
Cathode Pressure Drop as a Diagnostic Tool for Detection of Flooding and Drying Conditions in PEM Fuel Cells

Autori
Barbir, Frano ; Görgün, Haluk ; Wang, Xinting

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
207th Electrochemical Society Meeting Abstracts / - : The Electrochemical Society (ECS), 2005

Skup
207th Meeting of the Electrochemical Society

Mjesto i datum
Quebec, Kanada, 15.05.2005. - 20.05.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
PEM fuel cell; pressure drop; flooding; drying

Sažetak
Operating conditions, such as pressure, temperature, flow rates and humidity of reactant gases, have a great effect on PEM fuel cell performance. In general, performance of a PEM fuel cell is stable in a relatively narrow operational conditions window. This is mainly related to water management issues inside the cell. Although it is possible to select operational conditions that result in water balance at the inlet and outlet, flooding or drying may still take place due to uneven local conditions inside the cell. Too much water results in flooding, i.e., blocking of porous passages, which in turn reduces the transport rate of reactants to the catalyst site. Flooding can occur on both anode and cathode side. Too little water results in membrane drying, which in turn results in increase in ionic resistance. The immediate result of either flooding or drying is the loss of cell potential. Without a proper diagnostic tool, i.e., by monitoring only the cell potential, very often it is difficult to distinguish between flooding and drying. In order to take the proper corrective action(s) it is necessary to have a reliable monitoring and diagnostic tool.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA