PV-Hydrogen System To Demo Electricity and Water Supply

An energy and water supply system utilizing solar PV and hydrogen is to be demonstrated in Japan.
Published: Fri 19 Dec 2014

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Toshiba is to demonstrate a novel system concept combining solar photovoltaic generation, energy storage, hydrogen producing water electrolysis and fuel cells for disaster preparedness and energy management.

Under an agreement with Kawasaki City, the system will be set up in the Kawasaki Marien public facility – a designated emergency evacuation area – and Higashi-Ogishima-Naka Park in the Kawasaki Port area. The demonstration will run for five years from April 2015 through 2020.

PV and hydrogen

In the system, electricity generated from the PV installations is used to electrolyze water to produce hydrogen. The hydrogen is stored in a hydrogen tank and used in the fuel cells to provide electricity and hot water.

Under normal circumstances, the system will be used to contribute to peak shifting and peak cutting of power used in the Kawasaki Marien public facility and Higashi-Ogishima-Naka Park, through optimized control of the generation and storage.

In times of disaster, the system should be able to provide an estimated 300 evacuees with electricity and hot water for about one week.

The system will comprise 25kW of PV, with Toshiba’s long-life SCiB lithium battery for storage and Ene-farm pure hydrogen fuel cells. The hydrogen electrical power storage capacity is nominally 350kWh, and the hot water supply capacity is 60l/h.

Kawasaki City

Toshiba has been working on several projects in Kawasaki City. In October 2013 the two parties entered into agreements on collaboration and cooperation to work towards the achievement of a “Smart Community”.

Using Toshiba’s Smart Community Centre next to Kawasaki Station as the base of operations, the two parties have so far promoted measures including energy management for buildings around the station area, commercial revitalization, and electric bus operation.

The Smart Community Centre, which was completed in April 2013 and incorporates Toshiba’s intelligent building energy management system (BEMS), is intended as a showcase for smart community solutions. With a quake-absorbing structure, features include an uninterruptible power supply system monitoring the load capacity in each area of the building. In an emergency situation, the building could continue to operate for at least 72 hours, with its emergency power generators and large capacity water tank.