成果報告書詳細
管理番号20100000001838
タイトル*平成21年度中間年報 水素製造・輸送・貯蔵システム等技術開発 水素ステーション機器要素技術に関する研究開発 都市型コンパクト水素ステーションの研究開発
公開日2011/5/17
報告書年度2009 - 2009
委託先名清水建設株式会社 岩谷産業株式会社
プロジェクト番号P08003
部署名燃料電池・水素技術開発部
和文要約和文要約等以下本編抜粋:1. 研究開発の内容及び成果等
(1) コンパクト水素ステーションの試設計
a. 前提条件-機器仕様再検討-
前年度に検討した圧縮機、蓄圧器等、ステーションの構成機器について、それらの仕様、サイズ等について再度検討を行い、妥当性を検証した。
b. コンパクト化検討
昨年度明確にした機器仕様およびベース配置(敷地面積1,200m2)をもとに、更なるコンパクト化を検討した。具体的には、
・ 機器は全て地上設置で障壁により離隔距離を緩和した場合
・ 蓄圧器、圧縮機等をキャノピー上、または地下に設置した場合
・ 水素供給方式(オンサイト(水素製造設備あり)、オフサイト(トレーラーによる原料水素供給))を考慮した場合
について検討した。
また、今年度は水素充てん圧力が70MPa 級の水素ステーションには必須となるであろうプレクーラーについても配置検討に加えた。
英文要約Title: Research and Development of Compact Hydrogen Station for Urban Areas Use (FY2008-FY2010) FY2009 Annual Report
In the design of compact hydrogen station appropriateness was verified of constituent equipment of a station such as a compressor, that were studied during last fiscal year. Furthermore, a pre-cooler equipment was added to the equipment specifications that were made clear, and investigated further size reduction in the over-ground, underground, on-site type, and off-site type. For the development of the energy absorption wall that can reduce the reflected blast wave, we investigated the absorbent shape and material characterization of the energy absorption wall by using numerical parameter studies. It was found that the energy absorption technique by plastic deformation of the material had no effort, because the blast wave finished to reflect on the surface of the absorption wall before the material began plastic deformation. Therefore, another technique was developed to delay the phase of the reflected blast wave on the wall and smooth the blast reflected pressure. This technique is to set up the baffle plate with a hole in the middle in the front of the wall, and the half the amount of blast wave was penetrated. It was confirmed that the reflected blast wave has been reduced by about 40% by adjusting the blockage ratio and the distance of the baffle plate and the wall. We carried out the verification experiments for the reduction effect of the energy absorption wall. We conducted ten test cases using a cylinder tube of 25cm in diameter that is open at one end and closed at another end with the energy absorption material. The pressure sensors were installed inside of the cylinder tube, and the blast pressure and the reflected blast pressure were measured. As a result, the blast pressure that reflected on the energy absorption material was reduced and the effectiveness of the energy absorption wall is valid. In development of hydrogen combustion control system, a mixture of hydrogen with air and other inert gases was ignited during a very fine water spray (particle diameter is 16 microns and water rate is 50 mL/min per 1 nozzle) in a small combustion container. The threshold limit is 30% helium or 5% carbon dioxide + 25% helium for 8% hydrogen with 4 water spray nozzle. For same 8% hydrogen but increased 8 water spray nozzle the threshold limit is 20% helium. In case of increased 16% hydrogen with 8 nozzles it is 45% carbon dioxide. Then almost 5L hydrogen was found to be suitable for the experiment with water spray. In a study on the deactivation of hydrogen, the equipment and sections having possibility of hydrogen leakage such as a compressor are placed at lower position in the room such that the leaked hydrogen diffuses and mixed with the atmosphere in the room before it flows to the vent. Nitrogen and carbon-dioxide were examined as the inert gas and carbon-dioxide has been selected because of the easiness of storage and its low diffusivity. The following one of aspects has been studied to develop the deactivated hydrogen station. The explosion limit of hydrogen/carbon-dioxide/air mixture was measured. The data of explosion limit supplied by United States Bureau of Mine (USBM) are well known, but that limit depends on the measurement system. USBM used a equipment with a strong electric spark igniter. We developed and used a combustor with a pilot flame. The safe concentration of carbon-dioxide in the semi closed room has been determined.
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