rooms at 100 psig. It is distributed for the follow-
pump for each SSDG is interlocked to start
ing equipment and usage:
automatically whenever the SSDG starts.
Emergency cooling water from the firemain
FO system service heaters, service tank
system is piped directly to each diesel generator
heating coils (when used), and transfer
cooling system at a point downstream of the
heaters
duplex strainer. The firemain interface has a
motor-operated emergency cooling valve and a
LO system purifier heaters and settling
pressure-regulating valve. The motor-operated
tank heaters
valve is electrically connected to the generator
output and opens on start-up and closes upon
Seawater suction sea chest steam out
securing the diesel. The pressure-regulating valve
controls firemain flow and pressure by opening
Hot water heating system
whenever the normal cooling water system
Mk 26 GMLS anti-icing system
pressure drops below 35 psig. The two SSDGs in
AMR2 are provided with one common emergency
Distilling plant steam air ejectors and feed-
firemain cooling water supply. The SSDGs in
water heating through a 100/50 psig
AMR1 and AMR3 have their own emergency
reducing station
firemain cooling water supplies.
Galley equipment, steam kettles, dish-
Auxiliary Cooling System
washers, the dough proofer, and the
garbage disposal area through a 100/50
The firemain also provides direct seawater
psig reducing station
cooling to various nonpropulsion auxiliary equip-
ment. Such equipment includes the LP and
Filter cleaning room
HP air compressors, air-conditioning plants,
Laundry dryer and presses
refrigeration plants, and some electronic cooling
water systems. The firemain in the engine room
Antisubmarine rocket (ASROC) heating
provides cooling water to the propulsion gas
and cooling system (where applicable)
turbine, the bleed air cooler, the prairie air cooler,
and the gas turbine starting/motoring air cooler.
Heating, ventilation, and air conditioning
The firemain in AMR3 provides filtered seawater
(HVAC) system preheaters and reheaters
for cooling, lubricating, and flushing the stern
(where applicable)
tube shaft seal and the stern tube bearing.
FFG WASTE HEAT
DISTRIBUTION SYSTEM
STEAM AND WASTE
HEAT SYSTEMS
Each SSDG is supported by two jacket water
heat exchangers. One heat exchanger cools the
On the CG-, and DD-class ships, steam
jacket water using seawater as a cooling medium
is generated by three WHBs using the hot exhaust
and the other cools the jacket water with the waste
gas from the GTGSs as the heat source. This
heat circulating system. The waste heat circulating
steam is used for numerous support system
system is a pressurized closed loop hot-water
functions, which will be described in the next
system. It provides heating to the following
paragraph. On the FFG-class ship, these same
services:
functions are performed by the waste heat
circulating system. The primary purpose of the
Distilling plants Nos. 1 and 2
waste heat circulating system is to conserve the
Potable water heater
ship's expenditure of energy. This is accomplished
by using waste heat from the SSDGs.
Hot potable water accumulator
CG, AND DD STEAM
LO purifier heater
DISTRIBUTION SYSTEM
FO service heaters Nos. 1A and 1B
Steam from the WHBs is piped to the port and
FO transfer heaters Nos. 1 and 2
starboard steam mains and auxiliary machinery
4-26
