Fuel flexibility has been and will be to a higher extent utilised in offshore applications and in the shipping industry. In order to meet this demand, Wärtsilä has since 1987 developed engines that are capable of using both gas and liquid fuel as fuel. In 1996 Wärtsilä started to develop a lean burn dual fuel engine (DF). Today Wärtsilä has a product range for the DF engines ranging from 800kW to 17550 kW. The dual fuel engine has the ability of combining the benefits from operation on both diesel and gas. In diesel mode, the engine is able to operate with a high efficiency and at the same time meet the demands regarding NO(x) emissions and variation in load. In addition to this, the engine can be operated on both marine diesel oil as well as heavy fuel oil. In gas mode the engine has an even higher efficiency and the NO(x) emissions are already at such a level that it will meet the coming demands for the marine industry. In order to meet the demands from the market, Wärtsilä is continuously developing the dual fuel engines regarding ability to operate in gas mode at the highest performance when the gas quality is changing. The dual fuel engine must be able to work with the highest performance though the fuel quality is changing. The paper will show how the engine can adapt to the fuel and thus be operated with a high performance. The demand for mechanical drive for the dual fuel engines is also growing in order to have an easy installation combined with a wide operation range regardless of the fuel. The mechanical drive for Wärtsilä 34DF and Wärtsilä 50DF is being developed and the paper will show features that are crucial for a dual fuel engine operating on a variable speed with a high demand on loading capabilities. Test results from operation on variable speed as well as load acceptance performance will be shown.
Wärtsilä dual fuel (DF) engines for offshore applications and mechanical drive
2010
6 Seiten, 8 Bilder, 1 Tabelle
Conference paper
Storage medium
English
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