'PV/hydrogen System' Set Up at Wholesale Market in Fukushima

2019/07/30 01:02
Sousuke Kudou, technical writer
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The "Hydro Q-BiC" hydrogen energy-based system and the administrative building to which energy is supplied (source: Shimizu)

Shimizu Corp announced July 23, 2019, that it has applied the "Hydro Q-BiC" hydrogen energy-based system, which was co-developed with Japan's National Institute of Advanced Industrial Science and Technology (AIST), to the administrative building on the premises of Koriyama City General Regional Wholesale Market and started operation of the system.

By operating it on a daily basis, Shimizu will conduct the quantitative evaluation of the effect of reducing CO2 emissions and maintenance and operation costs, aiming to commercialize the system in fiscal 2020.

By using the Fukushima Renewable Energy Institute (FREA) of AIST as a base, Shimizu and AIST have been engaged in joint development since January 2016. They have established technologies to optimally operate the entire system by using (1) an efficient hydrogen production technology using renewable energy, (2) hydrogen storage/emission technology using hydrogen-absorbing alloy and (3) building energy management system (smart BEMS) developed by Shimizu.

The Hydro Q-BiC applied this time consists of (1) 64.5kW of solar panels, (2) hydrogen production unit with a production capacity of 5Nm3/h, (3) hydrogen storage unit with a capacity of 80Nm3, (4) four fuel cells (output: 3.5kW) and (5) two storage batteries (capacity: 10kWh). The smart BEMS monitors and controls those devices in an integrated way, realizing the optimal use of energy, according to Shimizu.

The system uses surplus solar electricity (up to 30kW) to produce/store up to 5Nm3 of hydrogen per year. It supplies solar electricity, in addition to up to 34kW of electricity from the hydrogen-based fuel cells and storage batteries, to the administrative building from 5:00 to 9:00am when the power consumption of the building peaks.

The system is expected to reduce CO2 emissions by about 40%, compared with the time before the introduction of the system, while reducing the peak power of the administrative building.

Fukushima Prefecture has a goal of meeting 100% of the energy demand in the prefecture with renewable energy by 2040 based on Fukushima Prefecture Renewable Energy Promotion Vision, which was revised in March 2012. This time, Shimizu and AIST made inquiries to Koriyama City about projects to which the system can be applied, and the application of the system to the administrative building was decided.

Shimizu plans to promote the use of the system to manufacturing plants, hotels, hospitals, etc in the future.