MAN Notches Multiple Cruise Orders
MAN Energy Solutions says its cruise business is experiencing a record order-intake. In the first eight months of 2018, the company has won orders to supply seven new cruise ships with engines plus exhaust-gas-treatment systems for scheduled delivery from the end of 2019 to 2022.The orders, which are cumulatively valued close to a three-digit million euro figure, total almost 300 MW of installed power for cruise ships ranging in size from 50,000 to approximately 140,000 gross tons…
Wärtsilä: Smokeless by Common Rail
There are two main ingredients to common rail fuel injection, one being the freedom to choose injection pressure and timing totally independently of the engine load. The other is computerized control, which makes it possible to consider several engine parameters and optimize the injection and combustion in each load situation. The Wärtsilä Common Rail development was kicked off for both medium-speed engines and low-speed engines at a seminar in June 1997. This year both medium-speed engines and low-speed engines will enter commercial service. The Wärtsilä Common Rail concept for four-stroke engines comprises: Camshaft driven high-pressure pumps…
Recent Wärtsilä Four-Stroke Engine Developments
Wärtsilä has focused its technological developments in this realm on three main areas: Common-rail fuel injection for heavy-fuel engines; Humidification methods for reduction of NOx; and Dual-fuel engines with micro pilot. Long-term research on the concepts hot combustion for combined cycles and steam injected diesel is also going on. Three engine types, i.e. the Wärtsilä 46, Wärtsilä 38 and Wärtsilä 32 have - so far - been made available for the common-rail injection systems. The pilot engine, which sails onboard the Carnival Spirit, has to date gathered more than 3,500 hours of operational experience, and the Wärtsilä 46 test engine has more than 3,000 hours as well.
