MAN sets up dedicated emissions test centre
At the Augsburg fountainhead of its medium-speed engine technology, MAN Diesel & Turbo has this year opened a new emissions test facility.
David Tinsley writes: The Clean Exhaust Test Centre, known by its German acronym CentAur, constitutes a €1million investment in the optimisation and further development of environmental technologies for marine and stationary power generation engines. Specifically equipped to evaluate various measures and systems to reduce emissions, CentAur is directly connected to the development test beds at the Augsburg plant, and is suited to operation with all MAN medium-speed engines.
The accent in the initial work programme is on the evaluation of the long-term behaviour of selective catalytic reduction (SCR) technology and large-bore engines using different types of fuel oil, as well as variant tests for the refinement of the integrated SCR/engine system. Currently, two L-type medium-speed engines are coupled to the CentAur equipment for SCR optimisation purposes. The two engines can be run in rotation, for the evaluation of both engine and SCR system performance.
CentAur’s creation and remit has to be seen against the backcloth of the tightening regulatory regime governing air pollution from ships’ engines and stationary power plant, and in the light of MAN’s bid to strengthen its role as a complete systems supplier, while consolidating its leading position in the large engine market.
With the planned entry into force in 2015 of IMO’s Tier III limits, which will call for Nox (oxides of nitrogen) emissions in designated regions to be cut by 80% compared with 2010 levels, the company is looking to supply the requisite emission reduction systems as well as the engines themselves. CentAur therefore represents an important element in the company’s increased R&D endeavours.
In addressing future environmental challenges, various emission reduction options will be investigated, including exhaust gas recycling (EGR) and particle filtration, as well as SCR technology. The test facility is equipped with the necessary urea supply arrangements, injection control, mixing devices, variable positioning possibilities for urea nozzles and mixers, as well as several inspection and measurement ports embracing the latest measurement techniques.
The direct links with the R&D department better ensure that results can be converted into optimised systems and technologies as rapidly as possible. Moreover, the scope and flexibility of the overall test arrangements and organisation better ensures a holistic MAN approach encompassing inner engine measures, control systems and engine adjustments, and after treatment technologies as the key to reliable and efficient emission reduction solutions.
Besides the in-house tests, MAN is conducting field tests, in both marine and power plant applications, so as to integrate and expand its developmental know-how on emission reduction systems for wide-bore diesel engines.
While CentAur is focused on tests with medium-speed engines, results are fed to an internal, interdisciplinary project drawing in all engineering departments covering engines, automation and turbochargers as well as the dedicated business units responsible for the marine and power plant markets and after-sales activities. All results are shared and discussed regularly between the medium-speed and low-speed engineering departments. The interdisciplinary medium is intended to maximise synergies as regards emission minimisation knowledge and capabilities.
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