Stage V Emissions Regulations for NRMM Machinery and Power Generation

The European Commission are to introduce the world’s toughest emission standards for non-road mobile machinery (NRMM) for Construction Machinery/Power Generation Equipment, Rail-Road Engines and Inland Waterway Vessels. The Stage V standards adopted by the EU Parliament in July 2016 which is now coming into force will tighten restrictions on non-road engines and equipment and set stricter limits on emissions of particulate matter (PM) and NOx (NO/NO2). The implementation of Stage V effectively mandates the use of a “Wall-Flow DPF” in the aftertreatment system to reduce both “Particulate Mass” and “Particulate Number (PN)” for diesel engines between 19KW and 560KW as it is almost impossible to achieve Stage V emissions without the wall-flow filter. The most common aftertreatment arrangement for Stage V is likely to be a DOC upstream of a DPF followed by an SCR and ammonia slip catalyst (ASC). Some of the concerns in the adoption of Stage V are: The Space Envelope available in which to install the after-treatment The strategy for DPF regeneration. Proposed Stage V equivalent Retrofit Solution from IMS IMSeco are developing a combined DPF+ SCR/ASC Reactor with an upstream DOC that can be retrofitted to existing Stage IIIA engines to reduce all legislated emissions in-line with Stage V equivalent levels. The system will utilise Hydrocarbon Injection in front of the DOC to “Actively” elevate the exhaust gas temperatures in order to continuously regenerate the soot captured within the Wall-Flow DPFs to eliminate any concern over potential filter blockages at low loads/low exhaust gas temperatures.

For more information on Stage V Emissions Regulations for NRMM Machinery and Power Generation talk to Industrial and Marine Silencers Ltd