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Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology

07.02.2024 Business News
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Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology
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07.02.2024

Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology

Daimler Truck and Linde Engineering present sLH2, a jointly developed refueling technology for subcooled liquid hydrogen. Compared to gaseous hydrogen, subcooled liquid hydrogen (sLH2) allows for higher storage density, greater range, faster refueling, lower costs and superior energy efficiency. Daimler Truck and Linde Engineering aim to establish sLH2 as a common refueling standard for hydrogen-powered trucks and make the…

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  • Daimler Truck and Linde Engineering present sLH2, a jointly developed refueling technology for subcooled liquid hydrogen.
  • Compared to gaseous hydrogen, subcooled liquid hydrogen (sLH2) allows for higher storage density, greater range, faster refueling, lower costs and superior energy efficiency.
  • Daimler Truck and Linde Engineering aim to establish sLH2 as a common refueling standard for hydrogen-powered trucks and make the technology openly available to all interested parties via an ISO standard.
  • The first public sLH2 fuel station was inaugurated in Wörth am Rhein, Germany, and will also be used by selected logistics customers for initial customer trials with the Mercedes-Benz GenH2 Truck from mid-2024.
  • Andreas Gorbach, Member of the Board of Management of Daimler Truck AG, responsible for Truck Technology: “Zero-emission transport needs three factors: the right battery-electric and hydrogen-powered vehicles, the required infrastructure network and cost parity for ZEVs compared to diesel trucks. In terms of hydrogen infrastructure, we are reaching a major milestone today: With sLH2, hydrogen refueling becomes as convenient as today’s refueling with diesel. It takes about 10 to 15 minutes to fuel our Mercedes-Benz GenH2 Truck for a range of more than 1,000 kilometers.”
  • Juergen Nowicki, Executive Vice President Linde plc and CEO of Linde Engineering: “Subcooled liquid hydrogen considerably increases the efficiency of hydrogen refueling systems. This and further advantages make sLH2 a practical, CO2-neutral alternative to diesel in the heavy-duty vehicle sector. The technology we have developed with Daimler Truck will help pave the way for the development of a robust refueling network, which is essential to keep vehicles moving and supply chains intact.”

Leinfelden-Echterdingen and Pullach, Germany – Daimler Truck and Linde Engineering, two leading industrial companies, have reached an important infrastructure breakthrough on the path towards decarbonizing transportation with hydrogen. Over the past few years, engineers from both companies have jointly developed sLH2, a new process for handling subcooled liquid hydrogen. When compared to gaseous hydrogen, this innovative approach allows for a higher storage density, a greater range, faster refueling, lower costs and superior energy efficiency. Refueling takes around ten to fifteen minutes for a 40-ton heavy-duty truck, carrying 80 kg of liquid hydrogen for a range of 1,000 kilometers and more. At the same time, the new sLH2 technology lowers the required investment for a hydrogen refueling station by a factor of two to three, and operational costs are five to six times lower. Today, liquid hydrogen can be supplied reliably throughout Europe.

Compared to regular liquid hydrogen (LH2) refueling technology, the new process uses a new innovative sLH2 pump to slightly increase the pressure of the liquid hydrogen. With this method, the hydrogen becomes subcooled liquid hydrogen (sLH2). Hydrogen in this state, facilitates a very robust fueling process that also keeps energy losses during refueling to a minimum. Furthermore, no data transmission between the refueling station and vehicle is necessary, which further reduces the complexity of the solution. At the same time, refueling capacity is increased to new levels. The pilot refueling station has a capacity of 400 kg of liquid hydrogen per hour. In comparison to regular liquid or gaseous hydrogen refueling concepts, sLH2 is considerably simpler while delivering increased performance.

Aiming to establish a common refueling standard for hydrogen-powered trucks, the technology is made openly available to all interested parties via an ISO standard. In the presence of Rhineland-Palatinate's Secretary of State for Economic Affairs, Petra Dick-Walther, and international media, Andreas Gorbach, Member of the Board of Management of Daimler Truck, and Juergen Nowicki, CEO of Linde Engineering, today inaugurated the first public sLH2 pilot station in Wörth am Rhein, refueling a Mercedes-Benz GenH2 Truck prototype.  

Andreas Gorbach, Member of the Board of Management of Daimler Truck AG, responsible for Truck Technology: “Zero-emission transport needs three factors: the right battery-electric and hydrogen-powered vehicles, the required infrastructure network and cost parity for ZEVs compared to diesel trucks. In terms of vehicles, the transformation is in full swing. In terms of hydrogen infrastructure, we are reaching a major milestone today: With sLH2, hydrogen refueling becomes as convenient as today’s refueling with diesel. It takes about 10 to 15 minutes to fuel our Mercedes-Benz GenH2 Truck for a range of more than 1,000 kilometers. We now call on other OEMs and infrastructure companies to follow our approach and jointly make this technology an industry standard.”

Juergen Nowicki, Executive Vice President Linde plc and CEO of Linde Engineering: “Subcooled liquid hydrogen considerably increases the efficiency of hydrogen refueling systems. The required investment is reduced by a factor of two to three, and operational costs are five to six times lower. This and further advantages make sLH2 a practical, CO2-neutral alternative to diesel in the heavy-duty vehicle sector. The technology we have developed with Daimler Truck will help pave the way for the development of a robust refueling network, which is essential to keep vehicles moving and supply chains intact.”

Linde Engineering sLH2 refueling station sets efficiency benchmark

The new public sLH2 refueling station in Wörth am Rhein, Germany, sets a benchmark in terms of energy efficiency and performance. With energy consumption of only 0.05 KWh/kg, it requires approximately 30 times less energy compared with conventional gaseous hydrogen refueling. The refueling station has a small footprint of just 50 square meters (not including the dispenser) and allows for configurations where several dispensers for parallel refueling of trucks are possible, as well as back-to-back refueling. The liquid hydrogen storage tank has a capacity of four tons, sufficient for approximately ten hours of non-stop refueling. Meanwhile, the capacity of the sLH2 fuel station can be increased to over eight tons per day with refilling. A lower initial investment and operational costs for the sLH2 technology is expected to ultimately result in lower total cost of ownership.

Aim: Setting the Industry standard for liquid hydrogen refueling

Daimler Truck and Linde Engineering aim to make sLH2 the leading hydrogen refueling technology for heavy-duty trucks. As a result, both companies offer a high level of transparency and openness around the relevant interfaces of the jointly developed sLH2 technology. The technology has been standardized in an open ISO process and is available to all interested parties. Now Daimler Truck and Linde Engineering call upon other OEMs, infrastructure companies and associations to apply the new liquid hydrogen standard and thereby establish a global mass market for the process.

Safe, fast and simple refueling with hydrogen

In contrast to current liquid hydrogen (LH2) refueling, the sLH2 process is similar to the convenience of current diesel refueling technology. Due to robust insulation the refueling hose and the design of the interfaces between the nozzle and fuel tank, the process is safe without the possibility of spillage. Therefore, the protective measures required for sLH2 refueling are comparable to those required for diesel. During the refueling process, cryogenic liquid hydrogen at minus 253 degrees Celsius can be filled into two connected 40 kg tanks mounted on either side of the truck chassis without the need for special safety gear. The sLH2 technology allows for high flow delivery of more than 400 kg of hydrogen per hour and filling 80 kg of liquid hydrogen can be completed in ten to fifteen minutes. Finally, the new process avoids what are known as boil-off effects and “return gas” (gas from the vehicle’s tank returning to the filling station) and therefore only one nozzle is needed to fill the tanks, making sLH2 technology easier to handle. The new refueling station in Wörth will be provided with liquid hydrogen by Linde, which has the largest liquid hydrogen capacity and distribution system in the world.

Liquid hydrogen enables a range of 1,000 kilometers and more

Daimler Truck prefers liquid hydrogen in the development of hydrogen-based drives. In this aggregate state, the energy carrier has a far higher energy density in relation to volume than gaseous hydrogen. As a result, the tanks of a fuel-cell truck using liquid hydrogen are more cost efficient compared to the carbon tanks used for gaseous hydrogen. And due to the lower pressure, they are also significantly lighter. The technology thus enables a higher payload, and at the same time, more hydrogen can be carried, which significantly increases the trucks’ range. This makes the Mercedes-Benz GenH2 Truck, like conventional diesel trucks, suitable for flexible and demanding long-haul transport. This was demonstrated in September 2023, when a prototype of the Mercedes-Benz GenH2 Truck approved for public roads completed Daimler Truck’s #HydrogenRecordRun, covering 1,047 km of distance driven on one fill of 80 kg of liquid hydrogen. The company aims to introduce the series version of the fuel-cell truck in the second half of the decade.

sLH2 to be implemented in Mercedes-Benz GenH2 Truck customer-trial fleet

From mid-2024 onward, five companies are expected to take part in initial customer trials to gain first experience in CO2-free long-distance transport with Mercedes-Benz GenH2 Trucks. The semi-trailer tractors will be deployed in different long-haul applications on specific routes within Germany, and they will be refueled at the now open public sLH2 refueling station in Wörth am Rhein and at a refueling station in the Duisburg area. Daimler Truck and its partner companies are thus creating a lighthouse project with the aim to demonstrate that decarbonized transport with hydrogen-powered trucks is already possible today. However, for the transformation to succeed, it will be necessary in the coming years to ensure the buildup of an international refueling infrastructure and a sufficient supply of green liquid hydrogen.

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Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology
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Caption From left to right: Juergen Nowicki, Executive Vice President Linde plc and CEO of Linde Engineering, Petra Dick-Walther, Rhineland-Palatinate's Secretary of State for Economic Affaiirs, and Andreas Gorbach, Member of the Board of Management of Daimler Truck AG, responsible for Truck Technology.
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Caption Board Members Andreas Gorbach (Daimler Truck, on the right in the picture) and Jürgen Nowicki (Linde) refuel the Mercedes-Benz GenH2 Truck with liquid hydrogen.
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Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology
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Caption Rhineland-Palatinate's Secretary of State for Economic Affairs Petra Dick-Walther refuels the Mercedes-Benz GenH2 Truck with liquid hydrogen.
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Release date 07.02.2024
Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology
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Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology

Caption From left to right: Andreas Gorbach, Member of the Board of Management of Daimler Truck AG, responsible for Truck Technology, Juergen Nowicki, Executive Vice President Linde plc and CEO of Linde Engineering, and Petra Dick-Walther, Rhineland-Palatinate's Secretary of State for Economic Affaiirs.
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Release date 07.02.2024
Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology
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Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology

Caption Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology
Copyright © Daimler Truck AG
Shelf number 24DT024_002
Release date 09.02.2024
Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology
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Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology

Caption Safe, Fast and Simple: Daimler Truck and Linde Set New Standard for Liquid Hydrogen Refueling Technology
Copyright © Daimler Truck AG
Shelf number 24DT024_004
Release date 09.02.2024
Paul Mandaiker
Paul Mandaiker

Spokesperson Technology & Regulations

paul.mandaiker​@daimlertruck.com
+49 176 30999267

Thomas Hoevermann
Thomas Hoevermann

Head of Corporate Communications Daimler Truck Group

thomas.hoevermann​@daimlertruck.com
+49 176 30984119