Fitted to a Wärtsilä two-stroke, five cylinder engine which was also built by HHM, the SCR is the first of its type to be compliant with the IMO's Tier III regulations for NOx emissions. The system was developed by HHM and Winterthur Gas & Diesel (WinGD), a jv of Wärtsilä and China State Shipbuilding Company (CSSC).
The engine and SCR package will be installed on a new 22,000 dwt multi-purpose vessel under construction for China Navigation (CNCo) at the Ouhua shipyard, due for delivery late this year. The vessel has been designed specifically to provide sufficient space for the SCR.
Throughout 2015 CNCo will take delivery of 15 new vessels fitted with HHM-manufactured Wärtsilä engines. "All these vessels are to be fitted with modern Wärtsilä RT-flex engines and are designed to be the most efficient ships of their type and size,” said Martin Cresswell, fleet director of CNCo.
"HHM is very happy to deliver the first two-stroke high pressure SCR produced in China,” said Zhou Weizhong, executive director of HHM’s R&D Centre. “We have been working on development of the SCR with major designers during the past three years and now the cooperation with WinGD shows what is possible. We look forward to continued growth in this market.”
John Bradshaw, principal technical specialist at Lloyds Register which approved the test bed trials of the system, said "These trials show that the technology to produce IMO Tier III compliant engines is actually available and hence give confidence that IMO Tier III certified engines will be ready for January 1, 2016.”
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