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Loop Energy to supply eFlow hydrogen fuel cell systems for transit buses in South Korea

Canada-based Loop Energy, a developer and manufacturer of hydrogen fuel cell-based solutions, announced the placement of the order for the first eFlow-powered hydrogen fuel cell systems (earlier post) under a commercial agreement with NGVI, a South Korean-based manufacturer of turn-key compressed natural gas and hydrogen fuel systems for transit and coach bus applications.

The announcement marks accelerating adoption of the eFlow fuel cell platform within the transit bus market vertical as well as Loop Energy’s official entry into the zero-emission commercial vehicle market in South Korea.


A standard flow channel in a fuel cell is based on a constant cross-sectional area. With this design, the mass flow rate reduces proportionally with the consumption rate—and therefore the flow velocity also reduces. This leads to uneven flow distribution, resulting in stack performances which are more variable compared to single cell measurements. By contrast, eFlow channels feature a cross-sectional area which converges down the length of the channel to compensate for the reduction in mass flow rate due to reactant consumption. This design levelizes reactant availability throughout the entire flow channel.

With Loop’s state-of-the-art technology and NGVI’s system integration expertise and customer network, we believe we can make hydrogen electric transit a reality in South Korea and beyond. Our fully integrated fuel cell system product line incorporates a lot of the input we collected from the customers, and the performance has been nothing short of outstanding. From the field data rolling in daily from previously announced municipal bus fleet in Nanjing, China, to new customer engagements in Eastern Europe and now in Korea, we are very pleased with the success we had in the transit bus market over the last few months.

—Ben Nyland, President and CEO of Loop Energy

The first hydrogen fuel cell system supplied under the agreement is earmarked for construction of the first testing and homologation vehicles under the agreement signed between NGVI and Ulsan Metropolitan City for supply of hydrogen electric transit buses.

Under the first phase of the multi-year agreement, Ulsan is anticipated to invest 2.3 billion KRW (approximately US$2.0 million) by 2024 in testing and certification of hydrogen bus technologies, supplied by a consortium of partners including NGVI. Ulsan announced a plan in 2018 to replace 40% of the city’s 949 buses with hydrogen-fueled vehicles and establish 60 hydrogen fueling stations by 2030.

After development and demonstration, the buses are expected to expand to fleet used in the capital area where Seoul Bus Company and TCHA Partners own more than 1,200 buses. The city says demand will rise as approximately 10% of Seoul buses are replaced or decommissioned annually. The number of buses owned by them is expected to be more than 2,000 by 2023, and the demand in the metropolitan area is expected to be more than 200 per year.

The future of bus transit fleet depends on hydrogen fuel cell technology, and we are extremely pleased to kick off the project with NGVI. To make the economics work, fuel efficiency is important to us because it is the largest share of our total operating cost, and we are committed to using the vehicles equipped with most advanced hydrogen fuel cell systems that NGVI can supply.

Our major shareholders include some of Korea’s largest bus fleet operators. As a result, we have a unique level of appreciation for the impact vehicle’s cost of ownership has on how quickly South Korea’s bus transit with adopting hydrogen technology. We have chosen to partner with Loop Energy because their products combine performance and economics into one value proposition that gives fleet operators exactly what they want.

—David Jung, Chief Executive Officer of NGVI



Like the UK South Korea seems to be moving in the direction of a largely fuel cell fleet for buses.

Since they are high use and return to the depot every day, they are a good fit for the technology as it maximises route flexibility and minimises new infrastructure demands.

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