Winterthur demonstrates new DF engine

11 May 2015
The X-DF technology features dual-fuel (DF) combustion technology with low pressure gas admission

The X-DF technology features dual-fuel (DF) combustion technology with low pressure gas admission

Winterthur Gas and Diesel (WinGD) has demonstrated a run of the first large bore model from its new range of Wärtsilä X-DF low-speed two-stroke engines that it says is in response to LNG carrier demand.

The X-DF technology features dual-fuel (DF) combustion technology with low pressure gas admission. The system is based on the lean burn Otto cycle – ignition of a compressed lean air-gas mixture by injection of a small amount of liquid fuel. The technology is said to significantly reduce NOx emissions, allowing a wide margin of compliance with IMO Tier III limits in  emission control areas (ECAs) without exhaust aftertreatment, combined with high overall system efficiencies for low operating costs and significantly lower investment costs compared to competing technologies.

WinGD, in cooperation with Diesel United, demonstrated the 72cm bore Wärtsilä 6X72DF, which is installed as a technology demonstrator at Diesel United’s Aioi works near the Port of Kobe, Japan.

"Diesel United is our long term development partner in Japan; together, we have pioneered a considerable number of technical and product innovations," said Martin Wernli, CEO, WinGD. "This large bore technology demonstrator installed in Aioi will enable us to showcase to customers worldwide the advantages of WinGD’s unique low-pressure dual-fuel technology offering economic and environmental benefits for their businesses."

Reducing both first and operating costs, the low-pressure gas admission aspect means that the gas fuelling system on the X-DF engines does not require a high-pressure lectrically-driven compressor, which considerably reduces energy consumption.

WinGD says it's responding to demand from the larger generations of LNG carrier vessels being built in response to a global trend to natural gas, as new reserves are brought into production. In addition, the company is addressing demand from owners of vessels such as tankers and container ships of all sizes considering LNG as fuel for economical, low emissions propulsion power to ensure IMO Tier III compliance in ECAs without excessive additional investment and operating costs. 

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