The Experts below are selected from a list of 57 Experts worldwide ranked by ideXlab platform

Eric Croiset - One of the best experts on this subject based on the ideXlab platform.

  • A two-dimensional modeling of solid oxide fuel Cell Button Cells with detailed electrochemistry mechanism
    Journal of Power Sources, 2016
    Co-Authors: Zhengyu Bai, Eric Croiset
    Abstract:

    Abstract A two-dimensional model of nickel/yttria-stabilized zirconia (Ni/YSZ) solid oxide fuel Cell (SOFC) was developed for a Button Cell system. The model integrates the detailed catalytic, electrochemical elementary reactions with ionic/electronic conduction and multiple gas transport processes in SOFC. The model is validated using published experimental data for H 2 –H 2 O fuel gas under different Cell sizes and operating conditions. The distributions of gas/surface phase species concentration and current density were predicted and the effects of operating temperature, fuel gas composition and fuel channel tube design on the Cell performance were studied. The results show that the electrochemical reaction processes occurs mainly within a 20 μm distance from the anode/electrolyte interface and that the Ni catalyst surface is covered mainly by H(s). For the chamber channel design, the calculations show that the tube chamber should have a diameter no smaller than the cathode electrode to obtain the best SOFC performance.

Scott A. Barnett - One of the best experts on this subject based on the ideXlab platform.

  • Multidimensional flow, thermal, and chemical behavior in solid-oxide fuel Cell Button Cells
    Journal of Power Sources, 2009
    Co-Authors: Graham M. Goldin, Huayang Zhu, Robert J. Kee, David M. Bierschenk, Scott A. Barnett
    Abstract:

    Abstract The quantitative analysis and interpretation of Button-Cell experiments usually depends upon assuming isothermal conditions together with uniform and known gas composition within the gas compartments. An objective of the present effort is to develop computational tools to study the validity of such assumptions. A three-dimensional computational fluid dynamics (CFD) model is developed and applied to a particular SOFC Button Cell, characterizing the fluid flow, chemistry, and thermal transport. Results show that when inlet flow rates are sufficiently high, Button-Cell data can be interpreted using the commonly used assumptions. However, when flow rates are not sufficient, the assumptions of uniform composition can be significantly violated. Additionally, depending on operating conditions there can be significant temperature variations within the gas compartments and the membrane–electrode assembly.

K Burela - One of the best experts on this subject based on the ideXlab platform.

  • REGULATORY APPROACH TO Button BATTERIES
    Injury Prevention, 2012
    Co-Authors: J Jamieson, K Burela
    Abstract:

    The Australian Competition and Consumer Commission (ACCC) has been assessing the safety of lithium-Cell Button batteries since August 2010. Part of this assessment compared the Australian injury experience with published USA data. This confirmed a similar level and nature of injuries in both countries. The study included an Australian market survey of these batteries and their packaging. Suppliers were consulted for safety information. The survey revealed that some packaging allowed easy access by children to multiple batteries. However, some batteries were individually packaged within an all-plastic seal that made access by children more difficult. The warnings on the packaging also varied. Some warnings detailed the hazards associated with ingestion by small children whereas other products had no relevant warnings or focused solely on disposal of the product after use. The security of battery compartments in products most commonly known for using Button batteries was also surveyed. The top two products identified with unsafe battery compartments were LED candles and bathroom scales. The survey also revealed that while remote controls were often powered by Button batteries, these compartments were predominantly secured. The ACCC is also monitoring current standards development work. At this stage it appears that some products such as bathroom scales will not be captured in Australia by current standards development efforts. In April 2012 thebatterycontrolled campaign was launched in Australia by the ACCC in partnership with Energiser and Kidsafe. This campaign increased awareness in consumers and suppliers of the risks associated with ingestion of lithium-Cell Button batteries. This is an abstract of a presentation at Safety 2012, the 11th World Conference on Injury Prevention and Safety Promotion, 1-4 October 2012, Michael Fowler Center, Wellington, New Zealand. Full text does not seem to be available for this abstract.

Zhengyu Bai - One of the best experts on this subject based on the ideXlab platform.

  • A two-dimensional modeling of solid oxide fuel Cell Button Cells with detailed electrochemistry mechanism
    Journal of Power Sources, 2016
    Co-Authors: Zhengyu Bai, Eric Croiset
    Abstract:

    Abstract A two-dimensional model of nickel/yttria-stabilized zirconia (Ni/YSZ) solid oxide fuel Cell (SOFC) was developed for a Button Cell system. The model integrates the detailed catalytic, electrochemical elementary reactions with ionic/electronic conduction and multiple gas transport processes in SOFC. The model is validated using published experimental data for H 2 –H 2 O fuel gas under different Cell sizes and operating conditions. The distributions of gas/surface phase species concentration and current density were predicted and the effects of operating temperature, fuel gas composition and fuel channel tube design on the Cell performance were studied. The results show that the electrochemical reaction processes occurs mainly within a 20 μm distance from the anode/electrolyte interface and that the Ni catalyst surface is covered mainly by H(s). For the chamber channel design, the calculations show that the tube chamber should have a diameter no smaller than the cathode electrode to obtain the best SOFC performance.

C Edward Hartford - One of the best experts on this subject based on the ideXlab platform.