Graphical making of a MALE B&W 5G70ME-GA engine with EGR system
MALE Energy Solutions is to supply its exclusive EGR (Exhaust Gas Recirculation) system as a discharges service for its brand-new, low-speed ME-GA engine, the Otto- cycle variation of its well-known ME-GI dual-fuel engine.
The high performance, low-pressure, two-stroke, dual-fuel MALE B&W ME-GA engine is being created at the firm’sResearch Center Copenhagen The engine supplies a reduced CAPEX service targeted at particular vessel kinds and also applications– such as LNG service providers– that have the ability to utilize boil-off gas as a resource of gas, or smaller sized ships where reduced resources expense is a top priority.
Based on the well-proven MALE B&W dual-fuel layout with marginal installment demands, the MALE B&W ME-GA utilizes a reliable ignition idea and also a special gas-admission system that supplies risk-free and also dependable procedure.
The firm anticipates to supply the very first industrial ME-GA low-pressure dual-fuel engine by end-2021 and also prepares to make the EGR alternative offered from late 2021, simultaneous with the intro of the engine.
MALE Energy Solutions claims that, along with making it possible for the engine to satisfy Tier III demands in both gas oil and also gas small, EGR will certainly help in reducing the ME-GA’s methane slip by 30 to 50%, while reducing details gas usage by around 3% and also details fuel-oil usage in diesel setting by 5%. EGR will certainly additionally fix the problem of pre-ignition on Otto- cycle engines.
MALE has lengthy experience with the innovation and also reserved its very first order for an EGR system in 2011 when it was totally incorporated within the MALE B&W 6S80ME-C9 primary engine of a 4,500 TEU containership newbuilding. Since after that it has actually obtained orders for over 241 engines with EGR, with greater than 33 devices currently in solution.
“Nine years have passed since our very first EGR system passed its Factory Acceptance Test, and the knowledge we have subsequently gained in the field has led to today’s fully-mature solution,” stated Thomas S. Hansen, Head of Promotion and also Customer Support, MALEEnergy Solutions “Our EGR system not only achieves NOx-compliance, but also delivers a performance upgrade for both conventional and now ME-GA engines.”
The ME-GA EGR service is a high-pressure system, which can be incorporated right into existing engine-room styles, and also the EGR device itself does not transform the engine impact. Its design-similarity to that of ME-C engines’ EGR systems will certainly reduce its rate factor, considering that the supply chain and also elements are currently grown.
The EGR system resolves attracting around 30 to 50% of the engine’s exhaust gas right into the EGR receiver, where it travels through a pre spray to reduce its temperature level, prior to travelling through a cooler spray. After travelling through a water-mist catcher, the gas after that experiences a blower to enhance stress back up to scavenging atmospheric pressure, prior to being fed back right into the compressor and also the engine.
The quantity demands of the ME-GA EGR system are substantially reduced with, as an example, much less pipework needed than for low-pressure EGR remedies.
Introducing an EGR service additionally boosts the security of the burning procedure, claims MALE Energy Solutions, which is presently investigating exactly how much it can reduce methane slip while keeping a great balance with recirculation.
