RENEWABLE ENERGY


receiver diameter of around 40m. For the tanks, too, the unusually large, wide and thick plates supplied by Dillinger provide additional savings potential: on wall thicknesses, and thus on weight, but also on welds. Tanks to the plate lengths that the steel expert can supply, the steadily rising tank diameters of 40m and more can be fabricated from just a single plate, thus again reducing the number of welds necessary. And in the case of longitudinally welded shell courses with internal diameters of up to 3,800mm, the large width and length of the suppliable plates also help to significantly reduce the number of circumferential welds.


HOLISTIC CAPABILITIES ENSURE GREATER EFFICIENCY AND SAFETY If required, Dillinger can produce shell courses of up to 4.3m in length with wall thicknesses of more than 200mm, depending on mechanical strength, diameter and plate width. Tis is a capability of which MAN Energy Solutions has already made use, since it can itself only form plates of up to 3m. Another service boosts the efficiency of solar-power plant engineering: cutting of heavy plates precisely to length and width, including weld-edge preparation on ultra-modern edge-milling machines. Tis machining process takes place in a single operation; it is applied to all four edges simultaneously, with no intermediate turning. Plates of up to 160mm in thickness, up to 25m in length and up to 5m in width can thus be machined to extremely tight tolerances. Tis not only relieves the fabricator of the machining preparation of the plates supplied, it also significantly shortens and simplifies the welding process.


SAFETY AND RELIABILITY THANKS TO METALLURGICAL FORECASTING MODELS Te minimums for materials properties for use in pressure-bearing equipment are strictly stipulated in codes and specifications. Te real challenge can, however, be found in the additional requirements demanded by customers, fabrication companies and specialist welding engineers. To assure a service life of three decades, including multiple repair cycles, the steels must exhibit the minimum specified mechanical properties without any losses even after repeated welding operations and subsequent stress-relieving annealing. Intensive discussions involving


Longitudinally welded shell courses supplied by Dillinger


all those participating are a routine occurrence until the end customer has approved the specification of the steels for the plant or facility he is planning. In this context, Dillinger provides suppliers such as MAN Energy Solutions with the assurance that the mechanical properties will meet the relevant specifications contained in the standards even after repeated repair welding. Tis is made possible by especially reliable metallurgical forecasting models, using which Dillinger checks customers’ specifications for their feasibility. Tis is of exceptionally great importance in the case of special steels used in great thicknesses, such as can be required for fabrication of pressure-bearing equipment. Tese smart models are continuously trained on a neurone-network basis, with the result that the experts are able, even before the start of production, to submit a reliable prediction of the implementability of the required properties and a corresponding risk evaluation. After production of the steel, the data determined are checked again and confirmed on the certificate. In this way, companies such as MAN


Energy Solutions are able to demonstrate to their customers that steel products exhibit the stipulated mechanical properties even after multiple heat- treatment operations and that the system can thus be operated without danger for three or even more decades. At the same time, they have, in working with the heavy-plate producer, the certainty of needs-orientated scalability of delivery quantities even in the case of very large engineering projects.


SOLAR ELECTRICITY FOR GREEN HYDROGEN AND SOLAR FUEL


MAN Energy Solutions’ view of its cooperation with Dillinger is correspondingly positive: in decades of cooperation, the Saarland steel suppliers have proven their quality again and again, as Christian Schuhbauer notes: “Our experience is that Dillinger is an entirely dependable partner with an extremely high delivery reliability.” He adds: “Tere are, in any case, only


a few suppliers for plates of 120mm and above. So such a dependable supplier located not too far away is especially appreciated.”


Tat also applies, in his estimation,


to the role that will also be potentially played by solar-electricity-based generation of hydrogen and its derivatives for the production of synthetic kerosenes for the aviation industry. For this application, correspondingly large and thick plates will be needed not only for the components of the solar-power plant but also for the synthesis reactors in downstream processes (such as Fischer- Tropsch) for production of kerosene. An extremely successful cooperation between Dillinger and MAN Energy Solutions took place using this process 12 years ago on a large-scale Shell GTL-Pearl project in Qatar. Tere are also good prospects of the anticipated rise in demand for CSP solar-power plants and the pressure on demand for synthetic kerosene from the aviation industry generating interesting starting points for even more successful cooperation.


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