Study on Air-Breathing Direct Borohydride Fuel Cell
| Autor: | Huei-PingYang, 楊蕙萍 |
|---|---|
| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 The proposed research aims to develop an Air Breathing Direct Sodium Borohydride Fuel Cell (Air Breathing DBFC) system that can generate a net electric power of 3 Watts. This type of proton exchange membrane fuel cell is usually characterized by a high volumetric energy density and a high power density. Such characteristics can potentially lead to the creation of efficient portable auxiliary electric power system for 3C products. Moreover, the use of air as oxidant drastically reduces the size and the weight of the fuel cell system by removing the oxidant fuel tank. In the current work, two different fuel cell designs have been created and compared. In addition to a traditional design, an alternative design is proposed in order to improve the air flow near the reacting area. Fluent CFD software was used to analyze and compare the air flow field. Prototypes of an Air Breathing DBFC single cell were then manufactured, tested and compared with relevant literature references. In order to find the optimal design and operating conditions, a series of experiments was conducted. The test matrix is composed of 6 variables: (1) the GDB of the cathode, (2) the presence of a Contact layer, (3) the orientations of the fuel cell, (4) the concentrations of the fuel, (5) the temperature of the fuel cell and (6) the fuel flow rate. In the best conditions, the prototype delivers a bit more than the 3 Watts with a reacting area of only 25cm². The feasibility of the concept is thus proven and the foundations for a future commercial development of the Air Breathing DBFC products are put in place. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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