Patriot State was the training ship of the Massachusetts Maritime Academy from 1986 to 1998.
The fresh water and reserve feed system includes five tanks. Three are for potable water and two are for boiler reserve feed.
Potable Water Tank Capacity 1 Stbd 15311 gal. 56.9 ton 2 Port 15311 gal 56.9 ton 3 Centerline 161.657 gal. 600.2 ton Boiler Reserve Feed Capacity 1 Stbd 8352 gal. 31 ton 2 Port 8334 gal. 30.9 ton
The feed water system consists of two reserve feed tanks. The reserve feed tanks hold distilled water ready to be added in the steaming cycle. The tanks receive water from the distilling plant, the deck fill connections (shore water), or the emergency filling connection from the potable water system. This water must pass through a locked, closed valve, and an open funnel to prevent backflow to the potable water tanks. Water can also be added through a manually controlled dump line or a manually controlled recirculating line spill valve.
The tank introduces make-up feed into the main or auxiliary condensers by vacuum dragging. There is also a connection through the pump suction manifold to the port feed pump.
The potable water system consists of three tanks located in three hold.
The distilling plant distillate pumps discharge distilled water to the three potable water tanks located in three hold. This distillate can be directed via a funnel piped to the reserve feed tanks. The tanks can be filled through deck connections, port and starboard, located on B deck, when in port.
There are two separate potable water systems. The original system feeds the house and the new system feeds the barthing area in three hold.
The original potable water system consists of two potable water pumps which take suction from the potable water tanks and discharge to the potable water hydropneumatic and the main which feeds the hot water storage heater, ice water coolers, and supplying potable water to the galley and quarters. Either pump has the capacity to supply the ship's services.
The potable water hydropneumatic tank has a capacity of 500 gallons and is arranged to start the pump when the pressure falls to 50 psig and stop the pump at 75 psig. A relief valve set at 90 psig is installed on the tank and relief valves set at 80 psig on the discharge side of each pump.
The hot water heater is an instantaneous type providing hot water on demand. The steam comes from the 35 psig contaminated steam system. Steam drains flow to the contaminated drain and inspection tank. Water outlet temperature is maintained at 140° F. by a thermostatically operated steam supply regulator.
There are also two hot water recirculating pumps installed. The original pumps are horizontal single stage, centrifugal pumps with capacity to circulate 25 gpm. These pumps take suction from the hot water loop circuit and discharge to the hot water heater and the storage tank.
The new potable water system consists of two potable water pumps which take suction from the potable tanks and discharge to the hydropneumatic tank, the hot water heater and the potable main to three hold. A hot water recirculating pump constantly circulates the hot water. Either potable pump has the capacity to supply the system.
Direct comments to William Haynes whaynes@maritime.edu
Mon, Jul 1, 1996
TSPS Engineering Manual ©1995 Massachusetts Maritime Academy