Main propulsion package order for six chemical tankers

09 Dec 2013
Propulsion package with low-speed engine, gearbox and controllable pitch propeller

Propulsion package with low-speed engine, gearbox and controllable pitch propeller

Wärtsilä says that it has received an order to supply complete main propulsion systems for six new chemical tankers, being built in China for Stolt Tankers by Hudong-Zhonghua Shipbuilding Group in China.

The packages comprise Wärtsilä RT-flex50 two-stroke engines, CP propellers with a tunnel gearbox and shaft generator, and oily water separators. Deliveries of the equipment are scheduled to begin in summer 2014. There is an option for a further two vessels.

Each ship, of 38,000dwt, will be 185m in length, with a 32.26m beam and will have 43 stainless steel tanks with a total volume of 44,000m³. The ships will have IMO I, II and III capabilities and will be able to handle the full range of challenging cargoes carried by Stolt. The first vessel is expected to be delivered in December 2015.

According to Wärtsilä, delivery of the complete propulsion system from a single supplier will ensure efficient integration of the various systems. The company adds that the combination of a two-stroke engine and shaft generator requires optimal co-ordination between the engine controls and the propulsion controls, which is significantly facilitated by having all systems supplied and delivered from the same source. Furthermore, with complete propulsion packages coming from one supplier, the risks of costly building delays caused by multi-supplier deliveries can be avoided.

"Optimal functionality of the vessels' propulsion is made possible by Wärtsilä's highly efficient complete package capability, which results in top performance with excellent reliability. The owners and the yard have specified the highest possible efficiency to keep fuel costs down with the lowest possible pressure pulses to safeguard a high comfort level on board for the crew, and Wärtsilä has consistently demonstrated its ability to meet this demand," said Aaron Bresnahan, vice-president sales, Wärtsilä Ship Power.

CEO Niels G. Stolt-Nielsen said: "These ships have been designed to deliver substantial improvements in fuel efficiency, and are expected to consume significantly less fuel compared with existing parcel tankers."

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