Yazar "Choupan, Naghdali" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • [ X ]
    Öğe
    A Finite Element Method Study of Polymer Exchange MembraneFuel Cell End Plate Materials by Using Arcan Specimen
    (2021) Avcu, Adem; Tüccar, Gökhan; Choupan, Naghdali
    In the current days, fuel cells are more preferred to generate electricity due to their positive sides. Because, if they use hydrogen andoxygen as fuel, they only produce electricity, heat, and water. This property of fuel cells is significant because it preventsenvironmental and chemical pollution, therefore, they contribute positively to the environment. In addition, they have more positiveaspects such as having no moving or rotating parts. Therefore, they don’t require mechanical maintenance and don’t make noise.Besides, they can be used in a wide range of areas as mobile and stationary power sources for electricity generation. There are manyfuel cell types but proton exchange membrane fuel cell (PEMFC) is more common than the other fuel cell types. It consists of partssuch as an endplate, bipolar flow plate, gas diffusion layer, catalyst layer, and membrane. End plates are located on the outer side ofPEMFC and hold together its stacks. In the design of the endplates, the state of fracture energy should be considered in differentloading conditions. Because the material may fail if it is designed only for the strength of materials concepts. In this paper, pure modeI, pure mode II and mixed mode fracture energy behavior of different materials were investigated numerically by using Arcanspecimen.
  • [ X ]
    Öğe
    A Numerical Investigation of The Fracture Energy of Materials for Fuel Cell End Plates
    (2021) Avcu, Adem; Choupan, Naghdali; Tüccar, Gökhan
    Nowadays, with increasing energy requirements, the use of clean energy resources has become important. Fuelcells are an important key for clean energy technology due to wide range of utilization areas such as automotive,portable power applications, electricity generation, space, aviation and naval technologies. Additionally, theyhave many significant properties such as not producing harmful gases, therefore they do not cause environmental and chemical pollution. Besides, they have not any moving parts, also they do not produce noise. Bycomparison to fossil fuel, fuel cells have high efficiency that reaches up to 60% in appropriate conditions. ProtonExchange Membrane Fuel Cell (PEMFC) has many advantages than other fuel cell types due to simple structure,higher efficiency and low operating temperature. PEMFC may consist of one or more stacks to generate moreelectricity. End plate of PEMFC holds together all parts of it. Therefore, the material selection for end plate isimportant to provide safe conditions. To use PEMFC safely, investigation of material fracture energy is requiredto decide that the material is in safe conditions or not. There are three fracture energy modes which are mode I,mode II and mode III. There are many methods to investigate failure of material at different modes. Unlike othermethods, Arcan specimen gives facility to evaluate of mode I, mode II and mixed modes. The main purpose ofthis paper was to compare the results of fracture energy (stain energy release rate) of different materials for endplates in fuel cells. Another goal was to select a suitable material was selected as PEMFC end plate.