title: Research on water discharge characteristics of PEM fuel cells by using neutron imaging technology at the NRF, HANARO.
abstract: An investigation into the water discharge characteristics of proton exchange membrane (PEM) fuel cells is carried out by using a feasibility test apparatus and the Neutron Radiography Facility (NRF) at HANARO. The feasibility test apparatus was composed of a distilled water supply line, a compressed air supply line, heating systems, and single PEM fuel cells, which were a 1-parallel serpentine type with a 100 cm(2) active area. Three kinds of methods were used: compressed air supply-only; heating-only; and a combination of the methods of a compressed air supply and heating, respectively. The resultant water discharge characteristics are different according to the applied methods. The compressed air supply only is suitable for removing the water at a flow field and a heating only is suitable for water at the MEA. Therefore, in order to remove all the water at PEM fuel cells, the combination method is needed at the moment.
authors.affiliation: Department of Mechanical Engineering, Pohang University of Science and Technology, San 31, Hyoja-dong, Namgu, Pohang, Kyoungbuk 790-784, Republic of Korea. dragon11@postech.ac.kr
authors.forename: TaeJoo
authors.initials: T
authors.lastname: Kim
authors.forename: CheulMuu
authors.initials: C
authors.lastname: Sim
authors.forename: MooHwan
authors.initials: M
authors.lastname: Kim