成果報告書詳細
管理番号20130000000231
タイトル*平成22年度中間年報 新エネルギーベンチャー技術革新事業 新エネルギーベンチャー技術革新事業(燃料電池・蓄電池) 安全性と耐久性に優れた燃料電池用水素循環ブロワの技術開発
公開日2013/6/22
報告書年度2010 - 2010
委託先名株式会社テクノ高槻 国立大学法人九州大学
プロジェクト番号P10020
部署名技術開発推進部
和文要約
英文要約Title:New Energy Technology Research Development/ New Energy Venture Business Technology Innovation Program (Fuel Cells and Batteries)/ Development of safe and reliable hydrogen recycling blower for fuel cell system[s1]

(FY2010-FY2011)FY2010 Annual report The hydrogen recirculation blower (hereinafter HRB) that is the objective of this project is used to pressurize remaining hydrogen fuel from the power generation process in a fuel cell and to send it back to the upstream of the fuel cell. Since HRB carries hydrogen fuel, it requires explosion proof, higher reliability and safety. No commercial blower meeting such requirements is available. This has been a bottleneck of application of fuel cell system. We determined to utilize electromagnetic diaphragm system as HRB. We have studied for improvement of the reliability and safety of HRB. 1) Study on durability of HRB and degradation of diaphragm rubber by hydrogen We have developed a dry hydrogen recirculation testing system in order to study verify the durability of HRB and degradation of diaphragm rubber by hydrogen. The testing HRBs have been in operation by this system using dry hydrogen for 2,200 hours without any problem. Continuous operation of HRB for 3,000 hours, which is the final target of this project, will be achieved until the end of the period of this project. To clarify the degradation of diaphragm in the hydrogen environment, tensile-tested of rubber for diaphragm after exposure to hydrogen and air at elevated temperatures were performed as aging test. Rubber aged in hydrogen environment shows higher tensile strength and extensibility than that aged in air because of inhibition of rubber oxidation in hydrogen environment. According to these results, HRB shows higher durability than the air blower. Neodymium magnet, which is used as a core of electromagnetic movement of HRB, is exposed to hydrogen. Hydrogen embrittlement of neodymium magnet was confirmed by hydrogen exposure of it. Hydrogen embitterment of the magnet can be inhibited by surface coat. 2) Development of high-gastight HRB We established HRB prototype specification based on the requirements of fuel cell system manufacturers and developed the high-gastight structure design. The first trial model of hydrogen gastight HRB completed at the end of last year. The verification test of this model, using the hydrogen recirculation testing system, has been running for 1,400 hours without any problem. We estimates the test will demonstrate 2000-hour durability during the period of this project. 3) Business planning Our HRB can be applicable to various fuel cells systems, such as powertrain of fuel cell vehicles or motorcycles, industrial vehicles, auxiliary power units for mobile phone stations, portable on-site power generators, and so on. The survey of these markets tells that HRB can be expected to apply to industrial vehicles, such as forklift trucks or electric carts, and auxiliary power units for mobile phone stations in an early stage. We expect them to provide an enough market size by nearly present technical level. Targeting such application, we aim for commercialization of our safe and durable HRB with the industry’s first assurance of hydrogen pressurization in 2012.
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