|タイトル||*平成29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 アルカリ水電解水素製造システムの研究開発|
|報告書年度||2017 - 2017|
|英文要約||A) Effect of fluctuated electric power to the electrolyzer
Using lab-electrolyzer, power-supply shut-down influence was examined.
Results:The electrolysis voltage was stable until 300 shutdowns. Voltage gradually
increased thereafter, but voltage rise was less than 5% at the time of 500 shutdowns.
B) Middle-size electrolyzer
After 2 years(FY2015-2016), the analysis of the medium-sized electrolytic equipment
that had been operated for a long time after operation was carried out. Although
the electrolysis voltage did not change, peeling of the electrode catalyst was observed
at the cathode.
C) Large-size electrolyzer
Using Large-size electrolyzer,long term continuous operation test has been conducted
over 12,000Hrs.During this time, the performance was almost stable but a slight increase
in voltage was observed.As a result of the analysis, a slight change was observed in the
D) Development of DC power supply
The performance of the power distributor that distributes the fluctuation part of
the power generated by the wind turbine was evaluated using the mini-model equipment
(wind turbine capacity：5kW, electrolytic equipment capacity：2kW).
The result of the power generation test for 24-hours was the following:
The fluctuation part with the cycles of 10-1,200 seconds
that are included in the selling power can be reduced to less than 1/5 of
the wind turbine generation power by using the fluctuation power for electrolysis.
E) Cooperative control method development
Cooperative system between MW-class wind turbine and a water electrolyzer has been examined.
Wind turbine output fluctuates largely according to the time series change of wind speed,
but it is separated the stable component and the fluctuation component in real time by the
cooperative control system developed up to the previous year. Converts the output of the
fluctuating component to a direct current, and then supplies it to the water electrolyzer.
On the other hand, some of the stable components are consumed by system equipment such as
compressors, and the remainder is sold to the electric power system. Hydrogen produced
by water electrolyzer is compressed to 0.9 MPaG and sold through hydrogen supply network.
As a result of approximate cost estimation, the total (including 2MW wind turbine, 500kW
water electrolyzer, compressor, building and auxiliary facility) is estimated to be
540 million yen, most of which is the wind turbine construction cost.