Rolls-Royce 1004227 - Manual (Page 51)

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A-1
A
KNOWN ISSUES
Table A-1
Listing of Known Issues for Rolls-Royce Units
Issue Symptom Comments
Ancillary Package
Design Numerous Deficiencies Cooper Bessemer, now part of Rolls-Royce,
packaged the unit as a Coberra 6256 and
then, with the higher powered machines, the
Coberra 6562 unit. The troublesome Lube
Oil skid problems have now been resolved.
Westinghouse also offered a package design
known as the EconoPac concept. While the
turbine performed very well, there were
problems with some aspects of the initial
package design, which were corrected by
RR.
Digital Control
System Upgrade Software and card
problems The new Entronics, (now part of Rolls-
Royce), control system required software
and card changes with introductory units (as
with any new product introduction that has
not yet been widely tested)
DLE Combustion Acoustics Initially the DLE technology produced
unacceptable acoustic problem within the
DLE combustion system. Modifications and
testing are being introduced to eliminate
these problems.
DLE Combustion -
Trent NOx Emissions The Trent DLE has had difficulty meeting 25
ppm NO
x
emissions guarantees. A new DLE
design is expected in 2003 to resolve the
issue.
Combustor
Module Casing -
Trent Gas Leakage –
Maximum Power
Derating A revised casing for the Trent DLE
combustor module is expected in 2003 to
resolve this issue. Until then the maximum
pressure ratio during cold day operation is
limited.
General - Trent Numerous Deficiencies Numerous problems occurring on the lead
machine (Whitby Cogen) in 1996-1999 –
resolutions indicated. Details unknown.