MAN Diesel & Turbo’s MAN 28/33D STC engine passed its Type Approval Test (TAT) at the end at the company’s facility in Augsburg, Germany.
The TAT was supervised by classification-society representatives from the China Classification Society, Class NK, Registro ltaliano Navale, the Russian Maritime Register of Shipping and the Indian Register of Shipping.
“Testing followed the time schedule precisely and the engine performed perfectly on the testbed,” said Daniel Degen, head of Diesel Engine Testing at MAN Diesel & Turbo. “The TAT is important as it showcases the 28/33D STC’s continued relevance both to the market and our licensees, and we are very happy with the result.”
The MAN 28/33 engine was originally certified in 2002 and has since been continuously developed in terms of product improvement and customer benefit on the one hand, and to meet new legislation on the other.
The last, significant developmental step in the engine’s lifetime was the introduction of sequential turbocharging (STC) in 2012, which markedly improved its dynamic behavior and enlarged the operation range of the engine for high torque operation on the double propeller curve, the company said.
Previously, the engine had already been accepted by seven classification societies (ABS, BV, DNV GL, LR, TL, CR). With this extension of the approval, the V28/33D STC is now certified by a total of 12 classification societies.
Certification facilitates the use of the engine in mechanical applications up to 500 kW/cyl (ICFN) or 455 kW/cyl (MCR) in ships worldwide. Using primary measures, the engine complies with IMO Tier II emission limits, while – in combination with MAN Diesel & Turbo’s customised SCR (Selective Catalytic Reduction) system – it can also meet IMO Tier III legislation.
The TAT in Augsburg took place over three days and covered the integration test of the engine safety and control system (SaCoS), the performance run and a final component inspection.