Tier III NOx

The IMO Tier III regulations require the reduction of nitrogen-oxide emissions (NOx) by approximately 76% in comparison to a Tier II engine. The IMO NOx-emission limits apply to all engines and depend on an engine’s maximum operating speed (n, rpm). Tier I and Tier II are global requirements, whereas Tier III standards only apply to current existing Emission Control Areas (ECAs) for NOx.

For WinGD X-DF engines, a low-pressure dual-fuel engine technology breakthrough has been realized. By applying the low-pressure gas concept, the investment in an expensive high pressure gas system is avoided, and no NOX reduction system is needed for operating in NOx emission control areas. To meet the low Tier III NOx emission limits, diesel engines necessitate an investment in NOX reducing technologies. For WinGD’s low-speed engines, SCR technology is offered with two solutions:

a) The high-pressure SCR (HP SCR) installed between the exhaust receiver and the turbocharger takes the least amount of space but requires being placed in the engine room.

b) The low-pressure SCR (LP SCR) solution allows installation of the SCR reactor after the turbocharger outside of the engine room or in the stack.

WinGD Compliance Solutions

Learn more about how WinGD engines are compliant with Tier III NOx regulations.

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