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Home » Projects » Project List » NATO SPS G4738 - Enhanced portable energetically self-sustained devices
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NATO SPS G4738 - Enhanced portable energetically self-sustained devices

 

The project is oriented toward the final project outcome, which would be ready-to-use prototype(s) of enhanced portable energetically self-sustained devices for military purposes, intended for field testing. The device will have to be light, produce enough power (200 W), be energetically optimized with low heat dissipation, and robust. This project is done in cooperation with Institute of Chemistry, Ljubljana and Faculty of.Technology and Metallurgy, University of Belgrade.

The catalyst(s) for the reformed will be developed and tested. The aim is to develop a catalyst or a combination of catalysts, which would enable conversion of methanol or ethanol to energetically-rich gas (high hydrogen content), which would not be harmful for fuel cells (low carbon monoxide content), and would enable low throughput of this gaseous stream at relatively low temperatures (150−200 °C) and per low catalyst mass (light and compact design). Parallel to catalyst(s) preparation and design, the project will encompass reformer development. The performance of the most effective commercial chips (reformers) will be overviewed in terms of pressure drop; improvements in structure/geometry will be suggested and examined with the computational fluid dynamics simulations and experimental measurements of in-house fabricated prototype chips. For a few optimal configurations, the second objective will be to devise a good heat transfer interface to remove the dissipated surplus heat to/from the fuel cell, consequently grossly enhancing the overall energy efficiency.

Numerous experimental runs using the permutations of best chip geometries and catalyst formulations, utilizing the measured effluent gaseous stream rates and compositions to deduce a process model, acknowledging the reformer operation at different process conditions and robustness for long operation (catalyst deactivation and reactivation). The reformer operation model is subsequently to be integrated with various scenarios of fuel cell operation to perform the sensitivity analysis of the reformer operation on the overall integrated system.

 

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Geometry of the model Temperature distribution Pressure distribution