Table 17-5. 500 KW DOD Generator Set Radiator data

Figure 17-15. Remote Radiator Application "C"

Table 17-6. Fuel Consumption for 500 KW DOD Generator Set

TM-5-6115-593-34 Generator Set Diesel Engine Driven Tactical Skid Mtd. 600 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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TM 5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 required (see figure 17-15). The hot-well tank protects the cooling system component seals against the pressure produced by the column of water whose vertical distance is the height of the radiator above the engine. 17-56. The tank is divided into two sections by a partial baffle separating the hot side (engine outlet) from the cold side (engine inlet). Engine connections to the hot- well tank must be below the radiator connections to prevent aeration of the engine. The bottom of the hot- well tank must be a minimum of 12 inches (30.5 cm) above the engine coolant outlet. The engine driven water pump supplies heated coolant from the engine to the hot side of the tank. The tank provides a quiet area of low flow velocity with a large surface area to permit entrained air to dissipate and escape through the vent. The auxiliary water pump draws water from the hot side of the tank and pumps it through the radiator and back to the cold side of the tank where it is tempered to prevent too low an inlet of the engine driven water pump. 17-57. The hot-well tank must be capable of containing 60 percent of the coolant system capacity when the unit is not in operation. The 60 percent figure includes the radiator and its piping to the tank, an additional 130 percent of the radiator piping capacity must be allowed for expansion and surge damping. See table 17-5 for radiator data. 17-58. When the unit is shut down, the radiator coolant drains into the hot-well tank, whose hot and cold sides are interconnected by a small opening, thereby reducing the head of pressure on the engine later pump seals. A 10 psi (7031 kg/m²) maximum external static pressure at the water pump is held to be the upper limit to provide for satisfactory water pump seal operation. Static pressures exceeding this limit may cause fact-type, spring-loaded seals to lift causing engine coolant leakage. 17-59. The hot-well tank should be vented and mounted within 10 feet (3 m) of the engine. To prevent aeration of the cooling system, the auxiliary pump connected to the tank must be below normal water level in the tank. Table 17-5. 500 KW DOD Generator Set Radiator data Section VII. FUEL SYSTEM 17-60. Since diesel fuel is less volatile than gas or gasoline, it may be considered a safer fuel from the standpoint of storage and handling. This is often reflected in less stringent regulations for placement of tanks. In some locations, fuel tanks of considerable size are permitted inside the building or enclosure; however, planning the installation. 17-61. The very fact that diesel fuel is a safe fuel can lead to careless installation practices which can result in poor performance of the engine and generator set. Diesel fuel may not leak out of an improperly tightened fitting; however, air can be drawn in through this loose fitting when the engine is operating. 17-19

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