成果報告書詳細
管理番号20160000000171
タイトル*平成27年度中間年報 水素利用等先導研究開発事業 低コスト水素製造システムの研究開発 高効率低コスト水素製造システムの研究開発
公開日2016/12/20
報告書年度2015 - 2015
委託先名日立造船株式会社
プロジェクト番号P14021
部署名新エネルギー部
和文要約
英文要約Title: Advancement of Hydrogen Technologies and Utilization Project/ Low Cost Hydrogen Production Research and Development(FY2014-FY2017)FY2015 Annual Report

(1) High-efficiency design for alkaline water electrolysis
We have accomplished the value by the laboratory scale test equipment that is lower than the electrolytic voltage of 1.80V at electric current density of 0.6A/cm2 which is the midterm goal in the FY 2015. At the same time, we checked the difference of electrolytic performance by the electrolyzer and confirmed the cause.
(2) Evaluation of durability for the alkaline water electrolysis equipment
 We performed the continuous test of fluctuating current more than once in the unit of 1,000 hours, and confirmed the degradation of the electrolytic performance due to the fluctuating current by comparison with the result from the constant current continuous test we implemented in the FY 2014.
(3) Low-cost design for the alkaline water electrolysis equipment
 The plating efficiency is increased drastically by changing the specification of alloy plating solutions during the electrode production and we confirmed this improvement as a component of cost reduction.
(4) Large size design for the alkaline water electrolysis equipment
 We carried out manufacturing of the small size electrolyzer (Electrode area: 2,500cm2) which is comprised of 20 fuel cell stack(12.5Nm3/h)and the electrolysis test and then we could understand the subjects that come with large size design business. By using the information in the small size electrolyzer, we performed the design and trial production of the medium-sized electrolyzer which has the electrode area of 4,000cm2.
 To clarify the effect by the fluctuating electric power, we performed the low load operation using the laboratory scale test unit and small size electrolytic test unit and then confirmed the output lower limit value.

(5) Verification test of the hydrogen production system
(5-1) Design of the hydrogen production system
 We performed the subject management toward the verification test by operating the small size electrolyzer which is comprised of 20 fuel cell stack. Meanwhile, we completed the design of simulator which can simulate the power of renewable energy while designing the central supervisory control unit.
(5-2) Research of the AC/DC conversion device with high efficiency
 We supposed an electrolyzer with the electrode area 1m2, performed the improvement research of efficiency for the AC/DC conversion equipment at output 6,000A and then confirmed by calculation that it is possible to improve the conversion efficiency by 5% or more.
(6) Producing the components in the hydrogen production system
 We produced the AC/DC conversion device for the verification test.
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