Operate the plant with the minimum variation in
speeds, pressures, and temperatures consistent with
operational commitments. A variation in the output of a
single component can upset the steam cycle balance and
require adjustments on stations throughout the plant.
You can see the truth of this when you compare fuel
consumption during economy trials with that during
normal operations. Teamwork among watch personnel
and competition between watches can improve fuel
economy and overall plant performance and reliability.
The following pages contain brief descriptions of the
general procedures common to most engineering plants.
Follow prescribed acceleration procedures.
Built-in safety factors will protect the equipment if you
accelerate rapidly only in emergencies, but routine
abuse will overload the plant and reduce reliability.
Correct use of the acceleration tables saves fuel and
extends machinery life. It also provides a time standard
the engine-room and fireroom watches and the officer
of the deck (OOD), can use to develop into a smoothly
. Combatant ships frequently operate below
maximum speed, and they use only a fraction of the main
turbines power at those speeds. Determine the most
economical speed and boiler combination for any
operating condition that might arise. In doing so, follow
the type commanders directives but allow for any
contingencies that may override the need for economy.
. Keep accurate records of boiler feedwater and
potable water consumption. Determine the ships
normal consumption and post it in tabular form at main
engine control, where it will serve as a ready reference.
Any unexplained or marked increase over the normal
means a leak or faulty operation of the engineering plant,
and you should correct the problem immediately. You can
hold feedwater losses to a minimum if you take the
Be sure the engineering crew is trained in the
procedures used to transfer condensate and
Be sure watch personnel keep a close watch on
pump shaft glands, valve glands, drain collecting
tanks, atmospheric exhaust, and all other possible
sources of leakage.
Be sure operating personnel consult the watch in
the spaces concerned before they take on
make-up feed, run water down from deaerating
feed tanks (DFT), or shift feedwater suctions.
. Keep boilers clean, inside and out. Soot and scale
are efficient insulators that prevent optimum heat
transfer and require a progressively increasing
combusiton rate to maintain a steady steaming rate. The
engineer officer should give this need his personal
attention. He may delegate preliminary inspections, but
he must make the final inspection.
. The use of distillate fuel reduces the need for
fireside cleaning and maintenance, and it improves
reliability. If the condition of refractory at 1800 hours is
satisfactory with little or no deposit, and if you make
periodic inspections, you often delay fireside cleaning
. You will nearly always have clean boilers if you
follow the Naval Ships Technical Manual (NSTM)
instructions that are summarized in the following
Inspect boiler firesides every 1800 hours of
steaming or more often if needed. Inspect and
clean watersides between 1800 and 2000 hours
of steaming or more often if needed.
Blow tubes before entering and after leaving
port, and at least once each week underway.
(Always get the OODs permission before
Blow down boilers as needed to maintain the
specified water analysis and avoid high
concentrations of scale-forming salts. Surface
blow steaming boilers as needed.
After you secure a steaming boiler and allow
enough time to reduce circulation caused by
generation, give the boiler a series of bottom
blows to remove suspended impurities and
Take all possible measures to prevent oil
contamination of the feed system and boilers. Be
sure all engineering operating personnel
understand the seriousness of oil contamination
of boiler water, its possible causes, and the
Dirty atomizers, contaminated fuel, and fuel at
improper temperature may require excess air to
maintain acceptable stack conditions. You must watch
the condition of the fire (it should be yellow-orange or
golden yellow in shade), as well as the condition of the