Technology and R&D

Scientists in Sweden have compared AC and DC topologies in PV-powered buildings using battery storage. They have found that DC distribution systems can achieve energy savings when they are combined with solar-plus-storage systems.

Chinese scientists have analysed reports of thermal issues with vanadium redox flow batteries (VRFB) and existing thermal management methods. They say the operating temperature should be maintained in the range of 10 C to 40 C to ensure VRFBs with high efficiency, weak side reactions, high electrolyte stability, and low crossover.

Enphase’s new bidirectional EV charger enables vehicle-to-home and vehicle-to-grid applications, and can be integrated with its home energy systems.

Honda has revealed a new hydrogen strategy, while Air Liquide and TotalEnergies have announced a new hydrogen joint venture.

Australian-headquartered solar data specialist Solcast has been acquired by Norwegian energy assurance and risk management company DNV as it seeks to strengthen its solar forecasting services to help maximise the value of PV power plants globally.

The hydrogen stream: ZeroAvia tested its new 19-seat hydrogen-powered aircraft, Chinese scientists unveiled new tech to promote bubble removal in electrolysers, and Egypt-Japan University of Science and Technology researchers claimed that the most efficient hydrogen production systems are based on waste heat.

Indian researchers have presented a new way to develop effective electrode materials for superpower redox flow battery (RFB) systems. Their flow cell with heat-treated nickel-rich platinum-nickel coating on the graphite felt delivered an impressive ever-best power density of around 1,550 mW cm−2.

Japan’s largest oil company, Eneos, has opened a green hydrogen demonstration plant at Bulwer Island in Brisbane. While the scale of the project is relatively small, producing just 20 kilograms of green hydrogen a day, Eneos Senior Vice President Yuichiro Fujiyama says the company will expand the project’s scale “in near future.”

A Victorian-based startup which claims to have developed a hydrogen enhancement kit that injects hydrogen into existing diesel engines to reduce diesel use, has begun the production of 10 commercial-ready systems. It will do field testing with the systems on sites of potential customers.

Researchers from the University of Adelaide, along with international partners, have successfully used seawater with no pre-treatment to produce green hydrogen. The team did this by introducing an acid layer over the catalysts in situ. “We have split natural seawater into oxygen and hydrogen with nearly 100% efficiency… using a non-precious and cheap catalyst in a commercial electrolyser,” University of Adelaide’s Professor Shizhang Qiao said.