MAN B&W radial turbochargers after 32000 hours of HFO operation
In late 1990, the first three of 36 reengined 6L28/32H gen-sets built by MAN B&W Diesel A/S in Holeby, Denmark, were delivered for the Atlantic-class container vessel MV OOCL Inspiration (ex. Ile de France), owned by Sea-Land Service. One of the determining factors for the re-engining contract was the expected 2O000 hour interval between overhauls. The gen-sets are optimized for an output of 1260 kW at 720 r/min (bmep = 17.8 bar), and are supercharged by high-efficiency, water-free MAN B&W model NR20/R turbochargers. The supercharging principle is constant-pressure turbocharging. The service rating of these gen-sets normally is 80% (sea load), with part-load operation down to 30% load not uncommon. Unrestricted part-load operation in spite of the lower air excess ratio as compared to pulse-pressure turbocharging is one of the preconditions for real heavy-fuel oil capability, and the MAN B&W turbochargers play a significant part in achieving this. The result of the inspection was that both compressor and turbine were clean and without detectable deposits, as were the diffuser and the nozzle ring, where hardly any erosion marks and no blade shortening due to erosion could be found.
- OSTI ID:
- 159724
- Journal Information:
- Diesel and Gas Turbine Worldwide, Vol. 27, Issue 9; Other Information: PBD: Nov 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fuel consumption reduction for diesel power generator sets through the application of an advanced turbocharger operating at constant speed. Final report 30 Mar-8 Oct 1982
Turbocharging systems with control interventation for medium speed four-stroke diesel engines