Koatsu Gas Kogyo has released its product of large-sized accumulator for the hydrogen power generation. The design pressure of the new accumulator is 22MPa (normal pressure at 19.6MPa) and the maximum capacity is 840 liter.

The existing accumulator for hydrogen power generations is sized at 650 liter or so at largest. Koatsu Gas Kogyo has succeeded to develop a 30% larger accumulator than the existing one, contributing to cost saving owing to the reduced number of accumulators by upsizing.

In the hydrogen power generation, as a large volume of hydrogen is used for operation at a time, several units of large-sized accumulator are required. Furthermore, it is necessary to add costs for accessories. There are also lots of subjects like the unit price of hydrogen in terms of utilization. In case of a large-scale hydrogen power generation, it has been required to run the business reducing the total cost.

To solve such subjects, the new product enables to reduce the cost for the installation of the necessary number of accumulators and their accessories by means of increasing the inside volume of the accumulators. It contributes to saving of the total cost of hydrogen power generation.

Koatsu Gas Kogyo has long been producing and selling accumulators of all specifications from low to high pressures. Last year the company renewed the medium pressure accumulator with a design pressure of 50MPa for hydrogen stations, and developed a cylinder-type medium pressure accumulator taking advantage of the panel forging technologies owned by Koatsu Showa　Cylinders of the group company.

As the accessories required for the conventional flange-type accumulators are no more necessary, the company succeeded in saving costs substantially.

Now that the large-sized accumulator for hydrogen power generation released at this time is also a cylinder type, the company has also realized a cost saving from the viewpoint of enhancement in the body structure like in the medium-type accumulator.