Surveillance Ship with Fuel Cell Performance Analysis and Design

2014 ◽  
Vol 496-500 ◽  
pp. 728-732
Author(s):  
Yean Der Kuan ◽  
Jing Yi Chang ◽  
Min Shiang Huang ◽  
Yen Yao Chu ◽  
Yan Ci Chen ◽  
...  

The main content of this paper is to design and fabricate a type of surveillance ship with a proton exchange membrane fuel cell (PEMFC), which adopts hydrogen as fuel cell to generate electricity to drive the surveillance ship. This ship has devices of reconnaissance, lighting, shooting. The reconnaissance device could return real-time images to the command center via cloud technique which could understand the current situation of the reconnaissance location. A buoyancy device is designed into the hull to enhance the stability of running. This paper starts from the functional design and system evaluation, then conducts the fabrication and assembly of the surveillance ship, and finally makes the electric integration and the tests of the PEMFC, surveillance ship running, and hydrogen consumption. The results of the research shows the developed surveillance ship has the advantages of low pollution, clean energy, no effect of day and night, and could be driven via only a small amount of hydrogen, which meets the trend of environmental protection and has the potential of applications in the future.

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Annika Carlson ◽  
Shun Yu ◽  
Göran Lindbergh ◽  
Rakel Wreland Lindström ◽  
...  

The performance of thin carboxylated cellulose nanofiber-based (CNF) membranes as proton exchange membranes in fuel cells has been measured in-situ as a function of CNF surface charge density (600 and 1550 µmol g<sup>-1</sup>), counterion (H<sup>+</sup>or Na<sup>+</sup>), membrane thickness and fuel cell relative humidity (RH 55 to 95 %). The structural evolution of the membranes as a function of RH as measured by Small Angle X-ray scattering shows that water channels are formed only above 75 % RH. The amount of absorbed water was shown to depend on the membrane surface charge and counter ions (Na<sup>+</sup>or H<sup>+</sup>). The high affinity of CNF for water and the high aspect ratio of the nanofibers, together with a well-defined and homogenous membrane structure, ensures a proton conductivity exceeding 1 mS cm<sup>-1</sup>at 30 °C between 65 and 95 % RH. This is two orders of magnitude larger than previously reported values for cellulose materials and only one order of magnitude lower than Nafion 212. Moreover, the CNF membranes are characterized by a lower hydrogen crossover than Nafion, despite being ≈ 30 % thinner. Thanks to their environmental compatibility and promising fuel cell performance the CNF membranes should be considered for new generation proton exchange membrane fuel cells.<br>


2021 ◽  
Vol 514 ◽  
pp. 230574
Author(s):  
Yannick Garsany ◽  
Robert W. Atkinson ◽  
Benjamin D. Gould ◽  
Rachel Martin ◽  
Laetitia Dubau ◽  
...  

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