Coriolis technology tackles the extremes of green hydrogen


While advances in battery technology have enabled significant advances in the range and performance of electric vehicles, another rapidly emerging option promises another step change in the performance of low-carbon vehicles. Green hydrogen, which refers to hydrogen produced by the electrolysis of water using electrical energy from renewable sources, solves many of the limitations of battery-powered vehicles. It offers a far higher energy density than batteries, and vehicles powered by it can already travel twice as far on a hydrogen tank compared to their battery-powered counterparts. In addition, filling is much faster than recharging. Quite simply, green hydrogen can decarbonize applications where renewable electrons simply cannot go. But hydrogen presents some challenges, including the very high pressures and/or low temperatures needed to contain it in a compact form. To learn more about how Coriolis meters help address these measurement challenges, Control met Genny Fultz, product manager for Emerson’s Micro Motion space offering.

Q: Can you talk about the challenges of dosing green hydrogen in terms of pressures, temperatures and precision needed?

A: Green hydrogen offers a great opportunity to use sustainable energy sources to power vehicles of all types and sizes. Like other gaseous fuels, it can be compressed and held at high pressures in order to rack up as many miles as possible in a single refueling. A flow meter used in the refueling process must remain accurate over a very wide and dynamic range of conditions, including pressures in excess of 10,000 psi. Coriolis technology simply offers the best solution to meet these requirements.

Q: It’s been just two years since Emerson introduced the Micro Motion High Pressure Coriolis (HPC015), a compact meter suitable for the accurate measurement of high pressure hydrogen flow in dispensing applications. How has the adoption of this product been since then?

A: Globally, hydrogen investments are receiving considerable attention across the entire value chain and have generated numerous inquiries from the hydrogen generation and transportation sectors. hydrogen. In Europe, we have seen strong growth with our HPC015 sensors in several regions, including the UK, France and Germany, where the strongest push for clean hydrogen has been. Our installed meter base in the Middle East, Asia and specifically China is also growing, where there is interest in using the HPC series in a master meter program. Our customer support teams are answering more calls regarding our Micro Motion ELITE cryogenic liquid hydrogen meters and high pressure hydrogen gas products.

The HPC015 high pressure meter has been designed for use in hydrogen gas dispensing applications. The XM-19 austenitic stainless steel we use is nearly twice as strong as 316L and resists high pressure hydrogen embrittlement. Plus, with a SAEJ2601-1 rated flow rate of 3.6 kg/min for the fill rate of 350 and 700 bar systems, along with industry-leading accuracy and performance when refueling in batches, we are well positioned to meet market demand.

Q: Although a hydrogen leak may not represent a climate change impact, it can certainly be a safety hazard. What features of Coriolis technology, and specifically the Micro Motion high-pressure Coriolis flowmeter, help ensure the safety and integrity of dispensing operations?

A: Another advantage of Coriolis technology that makes it well suited for these applications is that it is an all-welded assembly. The only connections are the meter input and output. And the other thing about Coriolis meters, of course, is that they’re extremely reliable. Once installed and operating in the field, the likelihood of this meter ever needing any type of maintenance is slim to none. This eliminates the need for anyone to open the dispenser because of the flow meter, which is another way to improve safety by reducing the need for any human interaction.

Q: I understand that a companion product, the HPC020 will soon be introduced to the market. A larger model number would seem to indicate larger capacities. Can you explain how this new meter complements and extends the features and specifications of the HPC015?

A: From what we’ve seen in the hydrogen dispensing market, OEMs want a complete dispensing solution for light-duty vehicles and medium/heavy-duty vehicle refueling at the station, so that a car and a delivery truck or a tractor-trailer can refuel at the same station or even the same distribution unit. Plus, they want the fill time for each to be quick and convenient, for long-haul truckers, as well as the average car commuter. The HPC015 has been designed to meet the SAEJ2601-1 standard of 3.6 kg/min for the fill rate of 350 and 700 bar systems. Using the same X-19 austenitic stainless steel which is almost twice as strong as 316L and resists hydrogen embrittlement at high pressures, we designed the HPC020 to have a rated flow rate of 9.0 kg /min in order to meet the filling needs of larger vehicles. With the upcoming launch of this new flow sensor option, Emerson can offer the industry a complete set of hydrogen dispensing flow meters.

Q: I imagine a higher capacity Coriolis meter would also be useful just upstream in the supply chain, when it comes to filling the trucks that distribute hydrogen to retail terminals. Is this a target application for the HPC020?

A: Yes, there is a growing demand for high pressure hydrogen truck loading and unloading, as in different parts of the world and in different locations, fueling stations may or may not be located close to hydrogen production facilities. ‘hydrogen. And, just as having an accurate measurement of hydrogen flow is important for individual consumer transactions, the loading and/or unloading of a truck may well represent a point of transfer of ownership between two business entities. Micro Motion HPC counters are also ideal for these applications.

Q: What other types of applications is the Micro Motion HPC series suitable for, and can we expect to see further line extensions in the future?

A: The HPC015 has seen success in applications ranging from paint to fuel injection with C-22 nickel alloy wetted parts that are ideal for corrosive applications like chemical injection.

Across the industry, the pressures are mounting. We have seen market interest in more high pressure meters in all kinds of applications, especially in carbon capture and sustainability initiatives. Obviously the need for more material options and different line sizes is there, and we will be there to meet it.


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