Turbocharger Cut-off System

Tuesday, July 21, 2009

To meet the growing demand for running large container vessels on varying loads, MAN Diesel has developed a turbocharger cut-out system that improves main-engine performance during low-load operation.

MAN Diesel’s Turbocharger Cut-Out System lowers main-engine fuel-oil consumption and improves performance during low-load operation. The system includes two, pneumatically operated cut-out valves placed at the turbine inlet and compressor outlet.

Installation of the Turbocharger Cut-out system requires little time and MAN Diesel PrimeServ reports that with the right planning, off-hire can be avoided. Installation during voyages can be carried out by a MAN PrimeServ installation team.

On engines with three turbochargers, one turbocharger cut-out enables operation at loads from 20% to 66% MCR, delivering:
•    an expected SFOC reduction of 5g/kWh and a 0.25 bar increase in scavenge-air pressure at 25% power
•    an expected SFOC reduction of 3g/kWh and a 0.52 bar increase in scavenge air pressure at 50% power
•    turbine-out temperature drops of up to 30 degrees.

Engines with four turbochargers and one turbocharger cut-out enables operation at loads from 20% to 74% MCR, delivering:
•    an SFOC reduction of 6g/kWh per 0.15 bar increase in scavenge-air pressure at 25% power
•    an SFOC reduction of 5g/kWh per 0.41 bar increase in scavenge-air pressure at 50% power
•    turbine-out temperature drop of up to 50 degrees

For engines with less than three turbochargers, MAN Diesel PrimeServ recommends a solution with variable turbine inlets.

Maritime Reporter October 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

Chevron Cylinder Oil Gains NOL from Wärtsilä

Chevron Marine Lubricants’ 100BN cylinder oil, Taro Special HT 100 has received approval for its use in another engine range – products made by Winterthur Gas & Diesel Ltd.

Volvo Penta Doubles Service Interval

Volvo Penta today announced a new extended service interval for its commercial marine diesel engines.   Under the new program, owners can double the maximum oil change interval to 1,

Wärtsilä 31 Engine for Aker ARC 124 Icebreaker

The recently introduced Wärtsilä 31 engine, which has been acknowledged by Guinness World Records as being the world's most efficient four-stroke diesel engine,

Maritime Security Maritime Standards Navigation Pipelines Pod Propulsion Port Authority Salvage Ship Electronics Ship Repair Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0747 sec (13 req/sec)