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Novel propulsion arrangement by Wärtsilä and RINA can deliver immediate benefits
The technology group Wärtsilä and the classification society RINA have announced a novel propulsion arrangement that offers full redundancy, less machinery, lower capital expenditure, reduced operational complexity, and optimised fuel consumption to lower costs and achieve emissions compliance. The new concept changes traditional ship design thinking and offers a highly efficient, future-proof alternative.The conventional approach in ship design has been to use 2-stroke engines for propulsion and 4-stroke engines for electric power generation. The Wärtsilä / RINA arrangement, however, requires just two 4-stroke dual-fuel (DF) engines, with options for electric power back-up from batteries or a small DF generator when the ship is idle. The design can achieve a reduction of up to 50 percent from the Energy Efficiency Design Index (EEDI) reference level value, and immediate compliance with the IMO’