The first in a series of 27,500 cbm Dragon-class ethane carriers ordered by Evergas is being delivered from the Sinopacific Offshore & Engineering (SOE) shipyard in China. The vessel features a comprehensive Wärtsilä solutions package, including two Wärtsilä 50DF dual-fuel engines, Wärtsilä propulsion equipment including the gearbox, two Wärtsilä 20DF auxiliary generating sets, a Wärtsilä LNG fuel system and a Wärtsilä cargo handling system. (Earlier post.)
The various systems are fully integrated to achieve maximum efficiencies. The order with Wärtsilä was placed in the beginning of 2013.
Engineering and supplying the complete cargo plant, the gas fuel supply system and the propulsion plant enables Wärtsilä to achieve optimal energy consumption efficiency for the entire vessel. This is clearly demonstrated, for example, where the LNG supply system is integrated with the cargo handling system so that it can be used to cool the cargo. In so doing, less energy and power is needed to keep the cargo temperature suitably low, thus providing a more efficient and environmentally sound overall system.
The Dragon-class ships are to be chartered by INEOS Europe for the transportation of ethane to Europe from the Mariner East project in the US. The carriers are purpose-built for the transportation of ethane, although they in addition can carry a wide range of petrochemical gases—LPG and LNG.
The Dragon class vessels are 180 meters long and 26.6 meters wide with a draft of approximately 9 meters. They represent the largest ethane carriers in their class in the world.