The new V28/33D engine has the highest power density in its class while maintaining full compliance with IMO-II and EPA Tier-II legislation. Its compact design is tailored for three main segments: multiple propulsion applications, including all types of fast ferry, naval ships, super-yachts, an STC edition; and as GenSets for offshore applications.
Additional design features include the new, in-house-developed, engine-mounted SaCoSone safety and control system, and the new, TCA33 turbocharger, which has been especially tuned for the V28/33D engine as it is a light, high-efficiency turbocharger with a compact design.
Other, major design optimizations include:
• a one-part air-manifold of symmetrical design
• an optimized crankshaft design with reduced stresses and improved lubrication an oil sump with increased volume to accommodate inclination requirement. A rolling dynamic of 22° and pitching static of 5° are allowed with an additional dynamic of +/- 7.5°
• an improved connection rod with a straight-cut design gives high reliability, better balance and lower engine vibrations
The Emission Tier II package includes:
• an optimised injection system
• a combustion chamber
• Miller cycling
• a high-efficiency charge-air cooler
• an improved NOx/SFC/soot trade-off
The new engine is available in an STC (Sequential Turbocharging) version that offers optimal engine-turbocharger matching. For naval applications in particular, this gives the engine an extended torque envelope that offers economical operating modes and improved engine-acceleration characteristics. The MAN Diesel STC system consists of two identical, standard turbochargers, one providing copious charge-air at low- and medium-speed, with the second cutting in at higher speeds.
MAN Diesel is simultaneously introducing GenSet versions of the V28/33D engine to the market, tailor-made for the offshore segment, with the following, alternative characteristics:
• 405 kW/cyl @ 900 rpm (10% overload for regulation)
• 455 kW/cyl @ 1000 rpm (10% overload for regulation)
• Fast starting possibility
• High loading step
• Integrated design with reduced interface
• High dynamic load response
• Lightweight GenSet with compact foot print
• Low vibration / low structure-borne noise
• Inclination up to 25° – all directions
• EPA Tier-II compliant
The 28/33D GenSet version is, by nature, easy to install owing to several factors:
prepared as one unit (common frame, attached pumps, valves, coolers etc)
• compact (high output, low weight)
• double, elastic-mounted engine
• simple customer connections (easy installation)
• integrated combi-cooler for fuel and LT/HT water with easy access and low weight
• closed and integrated, pressurised cooling water system (easy installation)
• integrated alternator cooling
• three-point, base-frame installation (easy installation)
(www.mandiesel.com)