Besides high efficiency,
the most important
factors are service
life, availability and
operational reliability.
During the past three
decades, increasing
power station unit
output resulted in a
considerable rise in
feed pump energy
consumption.
Additionally although
most of these plants
were designed for base
load operation, the feed
pumps were subject to
cyclic operation during
their lifetimes. To
solve feed pump problems
in existing power
stations is a highly
complex process.
Experience shows that
while a pump in one
power station operates
satisfactory, whereas a
machine of the same
design causes permanent
trouble in another.
Power station boiler
feed pumps operate only
as well as their design
is matched to all system
requirements. Thus,
knowledge of system
parameters and operating
conditions is the major
prerequisite to analyze
pump problems. Simply
replacing a non-running
pump by a new one, even
of a different make, is
not always the best
technical and economic
solution.
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