Caterpillar marine engines Tier III, a consolidated reality, which now concerns Caterpillar’s full line for commercial applications and yachts (Baglietto Shipyards, for instance) as well.

Caterpillar marine engines Tier III

Caterpillar marine engines Tier III. Listening the words of Ryan Darnell

For instance, both 3516E and C32 Diesel engines use SCR to get the emissions rules compliance. Ryan Darnell, Marine Product Value engineer within Caterpillar’s Large Power Systems Division says: «What’s not so widely acknowledged is that SCR delivers the lowest total cost of ownership in the marine sector. One of the main reasons why is because the relationship between engine-out NOx and fuel consumption is inversely proportional; this means SCR maximizes engine efficiency. The amount of diesel fuel required to run a Tier 4 Final engine from Caterpillar with an SCR  can be up to 9% lower than that required for a Tier 2 or Tier 3».

SCR compared to EGR

Comparing SCR with EGR, Darnell said: «while the approach may promise compliance, it depends on complex interactions of mechanical, electrical, and fluid processes working together in perfect unison» and that «The SCR option is not about redesigning the engine. Meeting Tier 4 Final using solely EGR has implications for engine efficiency and durability. Dramatic technological countermeasures can soften the impacts, but not eliminate them. The EGR option cannot claim validation in the harsh environments that engines face in marine applications. We’re very comfortable that we have not developed our Tier 4 Final marine solution around a technology that’s untried in its market which could compromise customer uptime».

The naval architects’ feedback

«The feedback we got from naval architects on this one was ‘make it as flexible to install as possible’, and that has been our guiding principle. The Caterpillar marine solution is also the most efficient SCR system on the market due to achieved lower overall fluid and fuel consumption for improved TCO, minimal new engine content for greater reliability and establishment of common designs and processes across the platform which reduces variability».

C32, 3500E, C280

The final statements of Ryan Darnell concern «EPA Tier 4 Final-compliant C32, 3500E, and C280 series marine engines are being offered with SCR because this technology offers not only compliance, but ease of installation, increased performance, and the lowest TCO. As a company, Caterpillar has advanced competencies in both SCR and EGR technologies; our position is based on selecting the right technology for the applications.»

Highlights

Cummins at Agritechnica: go with hydrogen!

In Hannover Cummins confirmed its commitment to the Destination Zero strategy, especially in the part dedicated to hydrogen, which is now a protagonist not only in agnostic engines, but also in production and supply phases. For agricultural OEMs, the direction is increasingly towards the “tailor-mad...

AS Labruna at METS 2023

AS Labruna is at home at the RAI of Amsterdam, the 2023 edition of METS is the 10th successive attendance

Related articles

MAN Energy Solutions: a new paper about decarbonization in shipping

MAN Energy Solutions has released a new paper to coincide with the holding of COP28 in Dubai. Entitled “Decarbonization technologies in merchant shipping”, the publication evaluates energy-saving devices for greenhouse-gas compliance and propulsion technologies for abatement potential and cost....

AS Labruna at METS 2023

AS Labruna is at home at the RAI of Amsterdam, the 2023 edition of METS is the 10th successive attendance

MAN Energy Solutions signs MoU with Doen WaterJets

MAN Energy Solutions and Doen WaterJets have agreed to join forces to offer a fully integrated propulsion system solution to the Australian Army’s LAND 8710 Littoral Manoeuvre Vessel Phase 1A (LMV-M) programme to acquire a medium landing craft suitable for a range of missions in Australia’s northern...