X-DF2.0 Technology

As market leaders in dual-fuel technology we are pushing engineering boundaries for smarter solutions to reduce emissions and improve efficiency.

Ensuring continuous improvement of X-DF technology through reductions to both fuel consumption and methane slip in gas mode, WinGD has launched X-DF2.0 technology with the introduction of iCER – Intelligent Control by Exhaust Recycling. iCER technology delivers enhanced combustion control through the use of inert gas and offers the following benefits:

  • 3% energy consumption reduction in gas mode
  • Up to 5% fuel consumption reduction in diesel mode
  • Up to 50% reduction of methane slip.

Recirculating exhaust gas through a low-pressure path

The iCER is designed to cool and recirculate part of the exhaust gas through a low-pressure path during operation in gas mode. Compared to a high-pressure path, the main benefit is the ability to use the full turbocharger capacity. It is possible to recirculate exhaust gas up to a maximum rate of 50% mass flow. This is handled through a system adjacent to the engine that circulates part of the exhaust gas after the turbine through a Cascade Exhaust gas Cooler (CEC) to the compressor inlet. The exhaust gas and the fresh air are mixed before entering the compressor wheel of the turbocharger.

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Arrangement and process flow of CEC, circulation water and drain

The image above shows a simplified process flow diagram of the iCER system. The cooling process reduces the temperature of the exhaust gas to below its dew point of ~40°C. Below the dew point water starts to condense out of the exhaust gas which leads to excess water in the system. This helps to avoid an increase of acidity in the recirculated water.

The water for cooling the exhaust gas is recirculated fresh water stored in a circulation tank. The recirculated fresh water used in the CEC is cooled by sea water via a plate heat exchanger.

Further information

For more information on our X-DF2.0 technology, view our press release

View press release

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X-DF series engines

Designed to meet emission requirements far below the IMO Tier III limits

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WinGD X-DF2.0

X-DF2.0 engine technology in action. View our animated video here.

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