Page 47 - CO_April_2023

TICKER TAPE

JCB PUTS HYDROGEN COMBUSTION INTO ACTION DYNAPAC TO LAUNCH NEW SERIES OF TANDEM
When it comes to new ROLLERS
product innovation, Dynapac is to begin EQUIPMENT
you can often learn as production of a new series
much from failures as of tandem rollers in its 6, 7
from successes. This and 10 tonne classes by
has certainly proven the the end of 2023.
case in development of The CC2200 VI – CC3800
hydrogen combustion VI Tandem Asphalt
engine technology. Roller range, which the
With numerous attempts company says it designed
made in the ’90s to for maximum operational
produce a working ease and driver comfort
model, 76 technical and safety, will come with a drum width of 1500 to 1680mm
papers describing what worked and, more importantly, what didn’t and will also be available in split drum and combi versions.
have been instrumental in pointing future development efforts in The new machines will be equipped with a number of features
the right direction. that Dynapac claims will “ensure optimal compaction results,
“We studied the 76 papers – experiments by universities, top operational efficiency, and driver convenience” as well as a
companies – and wh-at we realized when we got to the end of number of technological additions. For operator safety and
it was that the majority of those engines were conversions,” said comfort, Dynpac has included a full-colour seven-inch touch
Tim Burnhope, chief innovation and growth officer at JCB. Most display and easy access to all controls, 360 camera for improved
attempts involved trying to put hydrogen into an existing spark visibility for the operator and a low mounted corrosion-free water
ignition engine. “You wouldn’t put petrol in a diesel engine and tank, Elsewhere, the CC2200 VI is fitted with Dynapac’s Seismic
expect it to work. And that’s really what people have been doing feature which automatically determines the optimal frequency for
with hydrogen. any compacted material, constantly monitors the variations and
“The problem was the combustion was probably high pressure, automatically adjusts to changing conditions.
high temperature. The fuels were probably too rich. So, the The rollers are also fitted with Dynapac’s control and
outcomes were fairly poor.” documentation system Dyn@Lyzer and an open interface for 3rd
After dissecting the studies, JCB engineers identified 11 key party compaction control systems provided by Topcon.
technical challenges that needed to be addressed. Of these, Dynapac, which is a subsidiary of Fayat Group, has also recently
the majority, said Burnhope, came back to how you combust announced the launch of a range electric-powered vibratory
hydrogen in the first place, including the need to combust at plates, which have been added to its Z.ERA portfolio of emission-
much lower temperature and pressure and at a very lean mix of free machines
hydrogen to air.
“The only way you get the large content of air is to have a WASHING SOLUTIONS TO ‘BOOST PRODUCTIVITY’
turbocharger that’s very powerful that can put a lot more CDE, a supplier of sand and aggregate washing solutions for
air through the system,” Burnhope said. “In the ’90s, those the waste recycling and natural processing sectors, has been
turbochargers weren’t available, so the majority of the people who showcasing its washing solutions that it says are “transforming dirt
were doing the experiments didn’t have the ability to change the into dollars” across North America. The company showcased its
injection process or the turbocharger process to supply the air… CustomCare plant technology at ConExpo, which it says supports
And the one thing they definitely didn’t have was the computing customers to maximise plant uptime and throughput through the
power to be able to run simulations.” use of diagnostics and access to real-time data and feedback.
Fast forward a couple of decades to 2020 when such barriers no Presentations across the show included 360-degree digital
longer existed. Working closely with the University of Aachen in demonstrations exploring a range of CDE wash plants in
Germany, JCB took advantage of available computer simulation operation across North America in the natural processing and
technology to identify the precise elements of compression ratio, waste recycling sectors. Darren Eastwood, Business Development
temperature, pressure and fuel-to-air mix required – resulting in Director at CDE, says, “We’re seeing rapid growth in the waste
what Burnhope described as “an amazing breakthrough.” recycling space and are awash with waste recycling enquiries as
a result. CDE is leading the charge in supporting the industry to
Principles of hydrogen combustion realize value from construction, demolition and excavation waste,
That breakthrough is a “first-principles hydrogen combustion as well as by-product from the crushing and screening processes.
solution,” in which roughly 70% of the engine appears the same “These materials are often overlooked or discarded, but they hold
as its diesel counterpart. significant commercial value. With the efficiency and reliability
“Essentially, from the top of the block down… it’s exactly the same offered by our proven washing solutions, materials producers can
characteristics so the engine gives the same output,” Burnhope unlock that value to transform these materials into high-quality
said. “What we’ve done really is take off today’s combustion recycled sand and aggregates for construction use and boost
process and put a new combustion process on the top.” profitability.”

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